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Vibration characteristics and optimal design of composite sandwich beam with partially configured hybrid MR-Elastomers Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-03 Rajeshkumar Selvaraj; Mageshwaran Subramani; Manoharan Ramamoorthy
Abstract The free and forced vibration characteristics of a sandwich beam with composite face layers and partially configured carbon nanotubes reinforced magnetorheological elastomer (hybrid MR elastomer) core is presented in this article. Higher order shear deformation theory (HSDT) based on finite element (FE) formulation is employed to derive the governing equations of motion of the partially configured
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Analytical solution approach for nonlinear vibration of shear deformable imperfect FG-GPLR porous nanocomposite cylindrical shells Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-03 Mahdi Salehi; Raheb Gholami; Reza Ansari
Abstract This study presents an analytical solution approach to examine the nonlinear vibration of geometrically imperfect functionally graded porous circular cylindrical shells reinforced with graphene platelets (GPL) surrounded on an elastic foundation. First-order shear deformation theory is employed to formulate the considered problem. Four porosity distributions and four GPLs dispersion patterns
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Geometric/microstructural imperfection sensitivity in the vibration characteristics of geometrically non-uniform functionally graded plates with mixed boundary conditions Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-03 Ankit Gupta; Vijay Krishna; Venkat Boddu; Pavan Vemulapalli; Narendra Unnava; Brahma Nand Agrawal
Abstract In the present article, the vibration response of geometrically imperfect functionally graded material (FGM) plates with geometric discontinuities and microstructural defects have been investigated. The structural kinematics used in the present study is based on logarithmic shear-strain function. A refined generalized porosity model has been developed to encompass even and uneven types of
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Variational principle, uniqueness and reciprocity theorems for higher order time-fractional four-phase-lag generalized thermoelastic diffusion model Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-02 Md Abul Kashim Molla; Sadek Hossain Mallik
Abstract In the present paper, a variational principle is derived for the recently introduced higher order time-fractional four-phase-lag generalized thermoelastic diffusion model for a linear, isotropic and homogeneous thermoelastic diffusive continuum. Then uniqueness of the solution for the governing field equations of the considered model is proved under suitable conditions. Finally a reciprocity
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Vibration control of cantilever beam using poling tuned piezoelectric actuator Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-01 Kamalpreet Singh; Saurav Sharma; Rajeev Kumar; Mohammad Talha
Abstract This paper presents active vibration control of smart cantilever beam using poling tuned piezoelectric actuator. The vibrating response of piezo-laminated cantilever beam is modeled using a lumped parameter approach. The fuzzy logic controller is used to control the vibration and 49 rules have been established to develop the controller. Sensor voltage and derivative of sensor voltage are considered
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Simultaneous improvement of handling and lateral stability via a new robust control system Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-01 Mohammad Amin Saeedi
Abstract This article presents the development of a new combined controller based on an active steering system and an active braking system to increase maneuverability and the directional stability of the vehicle. First, to dominate the uncertainties of the dynamic model, sliding model control (SMC) method has been used. Then, to verify the performance of the proposed controller, a control system has
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On the attitude stabilization of a rigid body under control with distributed delay Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-03-01 A. Yu. Aleksandrov; A. A. Tikhonov
Abstract The problem of attitude stabilization of a rigid body is under consideration. The issue of realizing such a control system of the PID-controller type with distributed delay (integral term) is addressed. A theorem on the asymptotic stability of the stabilized position of the body, which justifies the possibility of constructing the desired control system, has been proven. The effectiveness
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Application of a new semi-analytic method in bending behavior of functionally graded material sandwich beams Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-27 Jun Liu; Congkuan Hao; Wenbin Ye; Quansheng Zang
Abstract In this article, the bending properties of functionally graded material (FGM) sandwich beams are analyzed by using the scaled boundary finite element method (SBFEM) for the first time. The model of FGM sandwhich beams is realized by using high order spectral elements, and only the axial dimension of the beam needs to be discretized. The analytical formula along the thickness direction can
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Memory and dynamic response of a thermoelastic functionally graded nanobeams due to a periodic heat flux Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-25 Ahmed E. Abouelregal; Husam E. Dargail
Abstract This study highlights the introduction of a new mathematical model for functionally graded thermoelastic nanobeams (FGNB) which contains a free choice of the kernel function and time delay. The basic equations that govern the proposed model have been constructed on the basis of Hamilton’s principle, Euler-Bernoulli's assumptions, Eringen’s theory and three-phase-lag memory dependent heat conduction
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Thermal shock response of porous functionally graded sandwich curved beam using a new layerwise theory Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-24 Shashank Pandey; S. Pradyumna
Abstract This paper, for the first time, presents the thermal shock response of porous functionally graded (FG) sandwich curved beams subjected to thermal shocks. The authors have used a higher-order layerwise beam theory developed for the analysis. This new layerwise theory has a higher-order displacement field for the core and a linear displacement field for top and bottom facesheets maintaining
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Analysis of SH wave in hollow piezo-composite cylinder with coupled imperfect interface condition Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-23 Shreeta Kumari; Sanjeev A. Sahu; Kamlesh K. Pankaj
Abstract Present study primarily focuses on interpreting the propagation pattern of Shear horizontal (SH) wave in a piezo-composite layered cylinder. The structure consists of three concentric cylinders composed of hollow fiber-reinforced (FR) cylinder enclosed within piezomagnetic (PM) cylinder along the curved surface area which is similarly superimposed by a piezoelectric (PE) cylinder. The overall
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Post-Yield characteristics of electrorheological fluids in nonlinear vibration analysis of smart sandwich panels Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-23 Reza Aboutalebi; Mehdi Eshaghi; Afshin Taghvaeipour; Firooz Bakhtiari-Nejad
Abstract The present study deals with the nonlinear free vibration analysis of sandwich plates containing electrorheological (ER) fluid as the core layer. Since yield stress of the ER fluid is relatively low, the fluid widely operates in the post-yield region in which the shear stress and shear strain relation is no longer linear. This study employs an equivalent linearized complex shear modulus to
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A new ground motion intensity measure for short period reinforced concrete structures subjected to near-fault pulse-like ground motions Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-18 Cengizhan Durucan; Hümeyra Şahin; Ayşe Ruşen Durucan
Abstract This study is aimed at developing a new ground motion (GM) intensity measure (IM) based on: (i) the shape of the response spectrum and (ii) spectral acceleration at the fundamental elastic period of the structure, Sa(T1). The proposed GM-IM is developed mainly for short period reinforced concrete (RC) structures subjected to near-fault (NF) pulse-like GM records. The main parameter used in
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Free vibration analysis of rotating functionally graded conical shells reinforced by anisogrid lattice structure Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-17 Seyed Masih Banijamali; Ali Asghar Jafari
Abstract This paper investigates the free vibration behavior of a rotating functionally graded conical shell, reinforced by an anisogrid lattice structure. The material properties of the shell are assumed to be graded in the thickness direction. The governing equations have been derived based on classical shell theory and considering the effects of centrifugal and Coriolis accelerations as well as
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A novel nonlocal higher-order strain gradient shell theory for static analysis of CNTRC doubly-curved nanoshells subjected to thermo-mechanical loading Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-15 Dongyin Lai; Kai Zhuang; Qi Wu; Mohammad Hassan Dindarloo
Abstract Up to now, no researches have been yet presented to investigate the static analysis of the carbon nanotube reinforced composite (CNTRC) doubly-curved nanoshells with considering the effect of thickness stretching in thermal environment. In this paper, deflection analysis of the CNTRC doubly-curved nanoshells subjected to thermo-mechanical loading based on nonlocal strain gradient theory is
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Assessment of negative Poisson’s ratio effect on the postbuckling of pressure-loaded FG-CNTRC laminated cylindrical shells Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-15 Hui-Shen Shen; Chong Li; Xu-Hao Huang
Abstract This paper examines the postbuckling behaviors of pressure-loaded laminated cylindrical shells made of carbon nanotube reinforced composite (CNTRC) under thermal environmental conditions. The shell has negative in-plane or out-of-plane effective Poisson’s ratio (EPR). The thermo-mechanical properties of CNTRCs are temperature dependent. The CNT volume fraction of the shell is in a piece-wise
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Vibrational frequencies of FG-GPLRC viscoelastic rectangular plate subjected to different temperature loadings based on higher-order shear deformation theory and utilizing GDQ procedure Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-15 Wenhua Huang; Juan Ren; Ali Forooghi
Abstract In this study, the effect of nonlinear temperature gradient on the natural frequencies of functionally graded graphene platelets reinforced composite (FG-GPLRC) viscoelastic plate embedded in the visco-Pasternak foundation is examined on the basis of higher-order shear deformation theory (HSDT) numerically and analytically. By performing Hamilton’s principle, the governing equations of the
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Adaptive momentum-based optimization to train deep neural network for computer simulation of hygro-thermo-mechanical vibration performance of laminated plates Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-15 Wenbing Wu
Abstract This article explores the vibration response of the hybrid composite structure with the aid of the adaptively tuned deep neural network (DNN). In order to find the features of the design-points, the semi-numerical technique is applied to the governing differential equations of the system acquired on the foundation of the kinematic theory with refined higher order terms. Considering higher
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On a thermoelastic magnetized half-space problem considering presence and absence of rotation in the context of GN (II) model Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-11 S. Abdel-Khalek; S. M. Abo-Dahab; Hammad Alotaibi; M. Aripov; M. Yu Rasulova
Abstract In this paper, having or lacking a rotating, magnetic field, and a time-dependent source of heat on a two-dimensional homogeneous, isotropic, and thermoelastic half-space was illustrated. The governing equations were formulated in the considering Maxwell's stresses. The surface boundary settings were explored considering the thermoelasticity model of Green and Naghdi (type II). The techniques
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Stiffness analysis of a planar parallel manipulator with variable platforms Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-10 Xiaoyong Wu; Yujin Wang; Zhaowei Xiang; Ran Yan; Rulong Tan; Ruizhi Shu
Abstract This work investigates the stiffness characteristics of a planar parallel manipulator with variable platforms. The stiffness model is established with shape variables of the base and mobile platforms based on the Jacobian matrix. By virtue of a nondimensionalization of the inhomogeneous stiffness matrix, two homogeneous submatrices are obtained. Upon which, two kinds of performance indices
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Effect of rotational inertia on building response to earthquakes via a closed-form solution Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-05 Andrés Alonso-Rodríguez; Konstantinos Daniel Tsavdaridis
Abstract In this article, a widely used building model, comprised of uniform coupled flexural and shear beams, herein improved by allowing for the effects of rotational inertia. Closed-form solutions in terms of trigonometric and hyperbolic functions are obtained, allowing for the explicit formulation of period ratios, modal participation factors (MPFs), mode shapes, and mode shape derivatives based
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Numerical assessment of the effects of ADAS yielding metallic dampers on the structural behavior of steel shear walls (SSWs) Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-05 Alireza Houshmand-Sarvestani; Arash Totonchi; Mohammad Amin Shahmohammadi; Hamzeh Salehipour
Abstract This paper aims to investigate the effects of steel-plate added damping and stiffness (ADAS) dampers, as a special kind of passive control device, on the seismic behavior of steel shear walls (SSWs). Various types of metallic dampers can be used to improve the seismic characteristics and hysteretic performance of the structures. However, ADAS dampers can increase ductility of the structures
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Radial vibrations on an elastic medium subjected to rotation and magnetic field Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-03 G. A. Yahya; A. M. Abd-Alla; Sherif El-Bendary
Abstract Based on the one-dimensional elastic theory, the radial vibrations of cylindrical isotropic embedded in an elastic medium are studied in the paper. The effect of the magnetic field of the radial vibrations of an elastic hollow cylinder with rotation is researched as well. The one-dimensional equation of elastodynamic is solved in terms of radial displacement. The frequency equation is obtained
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Snap-through analysis of thermally postbuckled graphene platelet reinforced composite beam Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-02 Haiyang Yu; Feng Liu
Abstract Present investigation deals with the snap-through phenomenon in a thermally pre-buckled or post-buckled reinforced composites beam. Composite laminated beam is reinforced with graphene platelets (GPLs) where the weight fraction of GPLs may vary in each layer. The governing equations of the beam are obtained by means of the first order shear deformation beam theory and the von-Kármán type of
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Size-dependent frequency analysis of the magneto-electro-elastic rotary microdisk by incorporating modified couple stress and higher-order shear deformation theories Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Xiaoze Yu; Xiaojing Fan; Xiaowei Bi
Abstract In this research, critical angular velocity and frequency of a magneto-electro-elastic (MEE) rotary microdisk using modified couple stress theory (MCST) is presented. The computational formulations of the MEE microdisk are obtained by mixing the strain terms of MCST to the microsystem's strain energy. Fore modeling the current microstructure's displacement field, higher-order shear deformation
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Dynamic simulation of a viscoelastic multi-phase nanocomposite reinforced cantilever spinning disk Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Chunling Xin; Zhaofei Zhang
Abstract This research's objective is a theoretical investigation into the frequency characteristics of the rotary multi-hybrid nanocomposite reinforced (MHCR) cantilever disk (MHCRCD). According to the Kelvin-Voight model, the presented structure is modeled as a disk covered by the viscoelastic foundation. Also, due to rotation, the centrifugal and Coriolis influences are investigated. For obtaining
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Numerical and experimental analysis of the effect of elastic membrane on liquid sloshing in partially filled tank vehicles Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Qiong-Yao Wang; Li Jiang; Mu Chai; Hui Huang; Jian-Hua Tang
Abstract A numerical analysis for fluid-membrane interaction is conducted to investigate fluid slosh within a partially filled horizontal cylindrical tank with an elastic membrane restraining the free surface. The fluid-membrane interaction analysis is performed to investigate the effect of membrane on liquid slosh responses in terms of liquid load shifts, slosh forces, moments and slosh frequency
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A fast simulation approach to assess draft gear loads for heavy haul trains during braking Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Jony J. Eckert; Ícaro P. Teodoro; Luis H. Teixeira; Thiago S. Martins; Paulo R. G. Kurka; Auteliano A. Santos
Abstract Train traction and brake dynamics simulations can be used to improve the safety and efficiency of heavy haul transportation. Virtual models can be used to analyze many operational conditions that are expensive or inviable to be measured due to costs and security risks. This paper presents a low computational cost simulation model that encompasses the longitudinal dynamics equations and the
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Effect of rotational inertia on building response to earthquakes via a closed-form solution Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-05 Andrés Alonso-Rodríguez; Konstantinos Daniel Tsavdaridis
Abstract In this article, a widely used building model, comprised of uniform coupled flexural and shear beams, herein improved by allowing for the effects of rotational inertia. Closed-form solutions in terms of trigonometric and hyperbolic functions are obtained, allowing for the explicit formulation of period ratios, modal participation factors (MPFs), mode shapes, and mode shape derivatives based
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Radial vibrations on an elastic medium subjected to rotation and magnetic field Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-03 G. A. Yahya; A. M. Abd-Alla; Sherif El-Bendary
Abstract Based on the one-dimensional elastic theory, the radial vibrations of cylindrical isotropic embedded in an elastic medium are studied in the paper. The effect of the magnetic field of the radial vibrations of an elastic hollow cylinder with rotation is researched as well. The one-dimensional equation of elastodynamic is solved in terms of radial displacement. The frequency equation is obtained
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Snap-through analysis of thermally postbuckled graphene platelet reinforced composite beam Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-02 Haiyang Yu; Feng Liu
Abstract Present investigation deals with the snap-through phenomenon in a thermally pre-buckled or post-buckled reinforced composites beam. Composite laminated beam is reinforced with graphene platelets (GPLs) where the weight fraction of GPLs may vary in each layer. The governing equations of the beam are obtained by means of the first order shear deformation beam theory and the von-Kármán type of
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Dynamic simulation of a viscoelastic multi-phase nanocomposite reinforced cantilever spinning disk Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Chunling Xin; Zhaofei Zhang
Abstract This research's objective is a theoretical investigation into the frequency characteristics of the rotary multi-hybrid nanocomposite reinforced (MHCR) cantilever disk (MHCRCD). According to the Kelvin-Voight model, the presented structure is modeled as a disk covered by the viscoelastic foundation. Also, due to rotation, the centrifugal and Coriolis influences are investigated. For obtaining
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Numerical and experimental analysis of the effect of elastic membrane on liquid sloshing in partially filled tank vehicles Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Qiong-Yao Wang; Li Jiang; Mu Chai; Hui Huang; Jian-Hua Tang
Abstract A numerical analysis for fluid-membrane interaction is conducted to investigate fluid slosh within a partially filled horizontal cylindrical tank with an elastic membrane restraining the free surface. The fluid-membrane interaction analysis is performed to investigate the effect of membrane on liquid slosh responses in terms of liquid load shifts, slosh forces, moments and slosh frequency
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A fast simulation approach to assess draft gear loads for heavy haul trains during braking Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-02-01 Jony J. Eckert; Ícaro P. Teodoro; Luis H. Teixeira; Thiago S. Martins; Paulo R. G. Kurka; Auteliano A. Santos
Abstract Train traction and brake dynamics simulations can be used to improve the safety and efficiency of heavy haul transportation. Virtual models can be used to analyze many operational conditions that are expensive or inviable to be measured due to costs and security risks. This paper presents a low computational cost simulation model that encompasses the longitudinal dynamics equations and the
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On the damping influence on the dynamic analysis of functionally graded beams resting on elastic foundation by Green’s function method Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-29 Mohammad Rezaiee-Pajand; Niloofar Rajabzadeh-Safaei; Seyed Mojtaba Hozhabrossadati
Abstract This paper deals with dynamic analysis of functionally graded beams on elastic foundation considering damping effect. It is assumed that the mechanical properties of the material vary along the beam thickness. The fourth-order differential equation is analytically solved by means Green's function method, and exact answer is achieved. Damping effect, which is an intrinsic property of structures
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Modal truncation damping in reduced modal analysis of piecewise linear continuum structures Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-28 Róbert K. Németh; Borbála B. Geleji
Abstract Modal analysis is an often-used method for the solution of dynamical problems in engineering practice. In the case of continuous systems and discretization methods (e.g., FEM) with a large number of degrees of freedom, the reduced modal analysis is used, where only a selected number of modes are applied, while the higher modes are neglected. A piecewise linear elastic structure has state-dependent
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Hybrid genetic algorithm based smooth global-path planning for a mobile robot Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-25 Phan Gia Luan; Nguyen Truong Thinh
Abstract The goal of the global path planning task is to produce an optimal safe path for robot respect to the given map. There are many global path planning methods that have been studied. In this paper, we propose a novel Hybrid Genetic Algorithm (HGA) that is used to generating smooth paths for differential wheeled robots. The main idea of HGA is to provide the dynamic mutation rate and switchable
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Thermo-electro-mechanical vibration and buckling analysis of quadrilateral and triangular nanoplates with the nonlocal finite strip method Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-25 Hamid Reza Analooei; Mojtaba Azhari; Hamzeh Salehipour
Abstract As a first endeavor, thermo-electro-mechanical analysis of quadrilateral and triangular piezoelectric nanoplates are investigated based on the nonlocal theory and the Kirchhoff plate theory. It is assumed that the piezoelectric nanoplate is subjected to a biaxial force, an external electric voltage, and a uniform temperature rise. Hamilton’s principle is employed to derive the governing equations
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Study of resonance condition of railway bridge subjected to train loads with a four-beam system Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-25 Yuntai Zhang; Lizhong Jiang; Wangbao Zhou; Shaohui Liu; Xiang Liu; Lingxu Wu; Tuo Zhou; Guangqiang Shao
Abstract Herein, an approach for the dynamic response of a four-beam system with arbitrary boundary conditions when subjected to successive moving loads is proposed. Based on the proposed method, the resonance condition of high-speed railway simply-support beam bridge with ballastless track-structure under moving train loads has been studied. Sine-Fourier series is an effective method that can play
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Optimal design of flexspline structure based on approximation model Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-25 Sixin Tang; Nanhai Ye; Zhonghua Huang
Abstract An efficient multi-objective optimization procedure to maximize the fatigue life of a reform flexspline (FS) structure is presented. Improper design of FS structure may cause the malfunctioning of harmonic drives (HD). After a brief introduction of the existing design flaw on the traditional cylinder FS, a new structure with minimal oblique angle in FS cylinder wall is proposed which can improve
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A robust method for the reliability-based design optimization of shape memory alloy actuator Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-22 Ahmed Yaich; Fatma Abid; Tarek Merzouki; Abdelkhalak El Hami; Lassaad Walha; Mohamed Haddar
Abstract This paper aims at finding an optimal design of a shape memory alloy (SMA) actuator that guarantees a required reliability level under uncertainties parameters. The SMA actuator is composed of two NiTi membranes which, at room temperature, are in a martensitic state. They have an initial at shape and are bonded together with an intermediate spacer. The motion of the actuator is caused by the
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Analytical solution for nonlinear forced vibrations of functionally graded micro resonators Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-22 Amin Vahidi-Moghaddam; Mohammad Reza Hairi-Yazdi; Ramin Vatankhah
Abstract The objective of this study is to investigate the size-dependent nonlinear forced vibrations of homogeneous and functionally graded micro resonators with axially immovable ends. According to the power law distribution, for the functionally graded micro resonators, the material properties are changed in the thickness direction. Considering the damping and mid-plane stretching effects, the governing
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Thermo-electro-mechanical buckling of FGP nano shell with considering thickness stretching effect based on size dependent analysis Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-22 Maryam Lori Dehsaraji; Mohammad Arefi; Abbas Loghman
Abstract Buckling analysis of functionally graded piezoelectric nanoshell is studied in this paper based on the higher-order shear and normal deformation theory and accounting thickness stretching effect. The nanoshell is subjected to axial load, applied electric potential and thermal loads. Thickness stretching effect is accounted in the analysis based on higher-order shear and normal deformation
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Effect of boundary position and defect shape on the mechanical properties of ball bearings Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-21 Hongchuan Cheng; Yimin Zhang; Wenjia Lu; Zhou Yang
Abstract This paper presents a mechanical model of angular contact ball bearing with local and extended defects in the outer raceway and the analytical formulations of varying stiffness under combined loads are obtained. The effects of radial load and clearance on variable stiffness of the bearing at the boundary positions are analyzed. Results show that the load distribution is not necessarily continuous
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Effect of a magnetic field and initial stress on the P-waves in a photothermal semiconducting medium with an internal heat source Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-20 F. S. Bayones; A. M. Abd-Alla; S. M. Abo-Dahab; S. M. Ahmed; M. M. Rashid
Abstract The present research paper handles a 2D deformation in a homogeneous thermoelastic photothermal semiconducting medium subjected to a magnetic field and initial stress with an internal heat source. The problem is framed in the dimensionless form and resolved utilizing the normal mode analysis method. Based on a numerical study using the parameters of silicon as a target, the physical data were
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Nonlinear geometry effects investigation on free vibrations of beams using shear deformation theory Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-19 Fatemeh Sohani; H. R. Eipakchi
Abstract This article presents an analytical procedure to predict the beams nonlinear natural frequencies using the first-order shear deformation theory. The nonlinear kinematics assumptions include the moderately large deformation of the mid-plane stretching and transverse deflection that are defined by using the von Kármán relations. The strains are small and Hooke’s law is used as the constitutive
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Mathematical modeling of vibration failure caused by balancing effect in hydraulic turbines Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-16 Gökhan Kahraman; Osman Özdemir
Abstract This article discusses the causes of vibrations depending on unbalanced hydraulic forces in rotating and non-rotating equipment in hydraulic plants within the scope of vibration measurement standards. The radial and axial positions of the turbine shaft, normal operating conditions, the absolute vibration of the signal output velocity during startup and shutdown during unbalance condition of
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A rotational gravitational stressed and voids effect on an electromagnetic photothermal semiconductor medium under three models of thermoelasticity Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-13 F. S. Bayones; A. A. Kilany; Ahmed E. Abouelregal; S. M. Abo-Dahab
Abstract In the current article, the main aim is to investigate a new model on a volume fraction, photothermal, initial stress, electromagnetic field, gravity, and rotation effect on an isotropic homogeneous semiconducting generalized thermoelasticity solid under three thermoelastic models viz: classical dynamical (CD), Lord–Shulman (LS), and dual-phase-lags (DPL). The basic governing equations of
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Unified formulas of constrained Jacobian and Hessian matrices for 3T1R overconstrained parallel mechanisms Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-11 Xing Zhang; Mingxing Yang; Dejun Mu; Hongrui Wang
Abstract The article proposes a general approach for solving the unified formulas of the constrained Jacobian matrix and constrained Hessian matrix of three translational and one rotational (3T1R) parallel manipulators (PMs). First, based on the constraint properties of PMs, the constrained couples of the limbs are divided into two categories: invariable and variable constrained couples. The unified
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Design for energy absorption using snap-through bistable metamaterials Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-11 Andrew Montalbano; Georges M. Fadel; Gang Li
Abstract Hysteretic energy loss occurs in bistable curved beams when they undergo back-and-forth snap-throughs due to cyclic loading. While numerical models and simulations can be employed to calculate the energy loss for a given curve beam or system, the effect of design parameters of the beams on the energy loss behavior remains largely implicit in the calculation. In this work, by using a high-order
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Sealing reliability and reliability sensitivity analysis of the piston–cylinder bore friction pair in a hydraulic pump under incomplete probability information Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-08 Tianxiao Zhang; Xianming Wang
Abstract Incomplete probability information makes it impossible to determine the probability distribution of a random variable accurately. Such a lack of probability information is manifested by the fact that the reliability index of engineering products can only be estimated qualitatively and approximately based on the readily available data. In this paper, the sealing reliability of the piston–cylinder
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Meshfree analysis of functionally graded plates with a novel four-unknown arctangent exponential shear deformation theory Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-08 Tan-Van Vu; Hieu Nguyen-Van; Cung H. Nguyen; Trong-Phuoc Nguyen; Jose L. Curiel-Sosa
Abstract A novel refined arctangent exponential shear deformation theory (RAESDT) is presented for analysis the mechanical behavior of both isotropic and sandwich FGM plates. Material properties are set to be isotropic at each point and varied across the thickness direction obeying to a power-law distribution of the volume fraction gradation with respect to FGM core or skins of the plate. Unlike high-order
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Computer simulation for high-order stability analysis of a multi-layer disk with honeycomb core under residual stress Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-08 Xinyuan Wu; He Liu; Mingjun Yang; Zhongzhi Hu; Yingchun Yue
Abstract Structures in honeycomb shapes have the configuration of a honeycomb to minimize material usage and to reach minimal cost of material and optimized weight. Thereby, this paper investigates the vibrations of sandwich disk which has imperfect honeycomb core with face sheets of graphene nano-platelets reinforced composite (GPLRC). The core of honeycomb is manufactured of aluminum based on to
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Field equations and memory effects in a functionally graded magneto-thermoelastic rod Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-07 Sudip Mondal; Abhik Sur
Abstract The main concern of this article is to deal with the thermoelastic interaction in a functionally graded thermoelastic rod being enlightened by the memory-dependent derivative. This article investigates the transient phenomena due to the influence of an induced magnetic field of constant intensity and due to the presence of a moving heat source of constant velocity in the context of three-phase
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Investigation of the interaction between concrete-gypsum interface and internal notch using experimental test and numerical simulation Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-07 Alireza Bagher Shemirani; Hadi Haeri; Vahab Sarfarazi; Pouyan Ebneabbasi; Mohammad Fatehi Marji
Abstract The experimental and discrete element method was used to investigate the interaction between concrete-gypsum interface and internal notch. Gypsum and concrete semi-circular samples with diameter of 10 cm and height of 10 cm were prepared separately. Then one gypsum sample and one concrete sample was attached to each other with glue. The middle space between gypsum–concrete interface has not
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Penetration characteristics of a penetrator with triangular cross-section impacting semi-infinite targets Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2021-01-06 Chun Guo; Jianping Qian; Wenbin Gu; Jianfeng Xue; Xianchun Ju
Abstract This article examines the characteristics of a penetrator with a triangular cross-section perpendicular impacting a semi-infinite metal target. Experiments and numerical simulations were conducted at an impact velocity of 1600 to 1800 m/s. The model, which was constructed to analyze penetration depth, showed the effect of the nose-shaped structure of the penetrator on penetration characteristics
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Static response and free-vibration analysis of a functionally graded annular elliptical sector plate made of saturated porous material based on 3D finite element method Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2020-12-30 Masoud Babaei; Kamran Asemi; Faraz Kiarasi
Abstract In this work, a numerical 3D finite element method is developed to investigate the natural frequencies and static responses of saturated FG porous annular elliptical sector plate. 3D elasticity theory is utilized to model the problem. Three various porosity patterns are assumed along the thickness direction such as porosity nonlinear symmetric distribution (PNSD), porosity nonlinear nonsymmetric
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Three-dimensional free vibration analysis of rotating sandwich functionally graded truncated conical shells under various boundary conditions Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2020-12-30 Chih-Ping Wu; Li-Yu Chiu
Abstract In this work, the authors develop a Reissner’s mixed variational theorem (RMVT)-based weak formulation for the three-dimensional (3 D) free vibration analysis of sandwich functionally graded (FG) truncated conical shells under various boundary conditions rotating with a constant angular velocity with respect to the central axis of the shells. The material properties of the FG layers constituting
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Effect of the fiber orientation angle on the vibrational behavior of symmetric and antisymmetric VSLC elliptical plates Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2020-12-30 M. Hachemi; A. Guenanou
Abstract This paper presents the vibration analysis of variable stiffness laminated composite (VSLC) elliptical plate by considering the curvilinear fibers. The problem is solved using the first-order shear deformation theory (FSDT) in conjunction with a curved trapezoidal p-element. The elements of the stiffness and mass matrices are determined analytically. The curved edges of the p-element are modeled
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Numerical model of a single stage gearbox under variable regime Mech. Based Des. Struct. Mach. (IF 2.286) Pub Date : 2020-12-29 Mohamed Habib Farhat; Taissir Hentati; Xavier Chiementin; Fabrice Bolaers; Fakher Chaari; Mohamed Haddar
Abstract Condition monitoring of gearboxes running under nonstationary regimes continue to be an important source of interest for industrialists and researchers. Despite the diversity of models in the literature, none allows simulating all cases of machine operations and failures modes in nonstationary regimes. This paper will discuss through a modeling approach how speed and load variations will influence