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An Indentation Method for Determining the Elastic Modulus, Hardness and Film Thickness of a Tri-Layer Materials Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-14 Siwei Zhao, Yuanxin Li, Jianwei Zhang, Bingbing Wang, Minghao Zhao, Chunsheng Lu
Multilayer materials have found extensive application within the aerospace industry due to their notable mechanical attributes. The operational longevity and dependability of such materials are substantially influenced by the performance characteristics of individual layers. In this study, an indentation method was established for employing a weighting function to simultaneously characterize the elastic
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A Semi-Analytical Solution for the Stress Field and Stress Intensity Factor of Hole-Edge Cracks Using Improved Muskhelishvili Method Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-11 Haibiao Gao, Yixiao Qin, Linhao Wang
A semi-analytical solution is provided to obtain the stress intensity factors (SIFs) of hole-edge cracks with different configurations and the stress fields along the crack propagation direction in an infinite isotropic plane. The complicated solution procedure while using the Muskhelishvili method is improved by expanding an irrational mapping function into an approximate rational function so that
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Effects of the Temperature-Dependent Behavior of the Gap-Filling PDMS on the Response of a Capacitive MEMS to the Electrostatic Actuation Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-07 Samira Valizadeh, Mohammad Fathalilou, Ghader Rezazadeh
In recent years, researchers have shown interest in using elastomers with high dielectric constant and good elasticity in capacitive MEMS. This paper aims to investigate how the performance of capacitive sensors/actuators is affected by the temperature-dependent behavior of gap-filling Polydimethylsiloxane (PDMS). As a case study, a model is created, consisting of a proof mass with two attached flexible
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Nonlinear Dynamic Analysis for a Jeffcott Rotor Considering Varying Connection Stiffness of Bolted Joint Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-07 Xuefei Zhang, Yuefang Wang, Dzianis Marmysh
Bolted joints have been widely used in rotor assemblies of aircraft engines. A typical bolt joint is composed of two metal parts connected mechanically with pre-tensioned bolts. During operations, the bolting pretensions can vary with the changing contacting relationship between the parts, which makes the connection stiffness of the joint nonlinear on the macroscopic scale. The fundamental problems
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Nonlinear Deflection Characteristics of Weakly Bonded Curved Composite Structure Under Hygro-Thermo-Mechanical Loadings Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-07 Chetan Kumar Hirwani, Ravi Kumar, Erukala Kalyan Kumar, Subrata Kumar Panda
A customized MATLAB algorithm is developed for internally separated laminated composite panels experiencing large geometric deformations. The algorithm is designed to calculate nonlinear deflection responses under the effect of combined hygro-thermo-mechanical (HTM) loading. The hygrothermal (HT) load on the panel is in-plane, whereas the mechanical load acts upon the structure transversely. The analysis
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Effects of Temperature and Layer Thickness on the Static and Dynamic Behaviors of Biocomposite Materials with Interleaved Viscoelastic Layers Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-07 Firas Meddeb, Abderrahim El Mahi, Jean-Luc Rebiere, Hajer Daoud, Mohamed Amine Ben Souf, Mohamed Haddar
This study investigated the influence of temperature variations on the mechanical and dynamic behaviors of biobased composites incorporating a passive control layer. These composites, which include an external layer made up of Flax/polylactic acid (PLA) and an internal layer of rubber, were manufactured using 3D printing technique. To better understand their mechanical characteristics, bending tests
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Thermal–Elastic–Magnetic Coupling-Induced Rubbing Behaviors of a Bladed Thin-Walled Rotor with Distributed Magnetic Actuators Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-07 Haijiang Kou, Yang Cao, Heow Pueh Lee, Yuxiang Shi, Jiaojiao Du
A bladed thin-walled rotor with magnetic bearings in gas turbines has minimal wear to improve the service life. Especially, the rotor system can actively suppress vibrations. Yet, thermal–elastic–magnetic coupling-induced rubbing features of a bladed thin-walled rotor with magnetic bearings are not clear, and blade rubbing behaviors induced by high temperatures always occur in this kind of rotor. This
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Multiscale Simulation of the Coupled Chemo-Mechanical Behavior of Porous Electrode Materials by Direct FE2 Method Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-03-02 Yizhou Lan, Lianhua Ma, Xiyan Du, Wei Zhou
Application of porous electrode materials has sparked significant interest as a strategy to mitigate traditional electrode mechanical failure arising from its intercalation-induced large volume change. In this work, a thermal analogy method is employed for implementing the coupled chemo-mechanical model into the finite element (FE) package ABAQUS via user subroutines UMATHT and UMAT, which is used
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Modeling the Stimulus-Responsive Behaviors of Fiber-Reinforced Soft Materials Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-29 Lu Dai, Junwei Xu, Rui Xiao
Hydrogels can change their size upon swelling. The swelling ratio is the same for all directions in the stress-free state. Dielectric elastomers can reduce their thickness and expand the area upon an electric field. Similarly, the expansion ratio in the plane is also the same for different directions. This isotropic shape change effect limits the function of these soft materials in certain circumstances
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A New Method for Calculating the Load Shared by the Primary Support of Deep-Buried Rheological Soft Rock Tunnels by Considering the Flexible Primary Support Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-23 Jian Zhou, Xinan Yang, Mingjie Ma
The gap between the theoretical solution of the load and the field measurement is too large to guide the support design while the primary support of deep-buried soft rock tunnels shares a large surrounding rock load. In this study, the flexible support effect of the primary support and the rheological effect of the surrounding rock were considered. The calculation procedure of load shared by the primary
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A Novel Tri-Magnet Levitating Bistable Electromagnetic Energy Harvester with Variable Potential Wells to Promote Snap-Through Behavior Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-23 Junjie Xu, Xukun Su, Xiaoyu Chen, Yonggang Leng, Shuailing Sun
To achieve broadband energy harvesting under weak excitations, this paper comprehensively investigates a novel tri-magnet levitating bistable electromagnetic energy harvester with variable potential wells (BEEH-VP). The bistable nonlinear mechanism is realized using the single-sided bipolarity of the ring magnets. Auxiliary springs are integrated into the ring magnets to dynamically self-adjust the
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Transient Structural Thermo-Mechanical Response of Multi-Layered Viscoelastic Composite Laminates with Non-Idealized Interfacial Conditions Based on New Fractional Derivatives Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-21 Chenlin Li, Suan Cao, Tianhu He
Multi-Layered viscoelastic composite laminates are commonly designed as damping structures in non-isothermal environments to avoid unnecessary vibration and ensure the safety of structures working in vibration engineering, such as reducing the unwanted vibration and noise of aircraft structures and vehicles. In recent years, there have been extensive research works that contributed to evaluate and
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Series NESs for Suppressing Strongly Forced Vibration Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-14 Ting-Kai Du, Hu Ding, Dong-Sheng Zhang, Li-Qun Chen
Improving the ability of nonlinear energy sink (NES) to suppress large vibrations under strong excitation has been widely concerned. Moreover, distributing NES to suppress multimodal resonances is also an issue that deserves more attention. This paper investigates the distribution strategy of the series NES in suppressing the vibration of a two-degree-of-freedom (2-DOF) system. Dynamic models are developed
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Modeling Long-Term Creep and Physical Aging Behavior of Carbon/Epoxy Composites Based on Coupling Model Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-09 Jiangyan Yang, Xiaofei Ma, Hui Wang, Fulin Shang, Demen Hou
Our previous study observed a non-monotonic time-dependent deformation from the long-term isothermal tensile creep tests, indicating the significant influence of physical aging on viscoelastic behavior. In this work, a new physical mechanism-based thermo-rheological complex constitutive relation that combines Ngai’s coupling model and Schapery’s nonlinear viscoelastic framework is established. A piecewise
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An Investigation on an SMA Valve in Micro-Channel Through FSI Approach Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-06 Saed Beshkoofe, Mostafa Baghani, Majid Baniassadi, Hamid Shahsavari
Micro-channels with built-in shape memory alloys (SMAs) can respond intelligently to channel temperature variations without applying an external force and control the flow rate. In this work, a 2D micro-channel with a shape memory alloy (SMA) valve is designed and studied using fluid–structure interaction (FSI) conditions. The behavior of the SMA valve, which includes bending under the effect of force
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A Novel Weak-Form Space Quadrature Element Method and Application in Analysis of Non-Homogeneous Truss Structure Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-06 Kai Wang, Chuang Feng, Ding Zhou
This work proposes an improved weak-form quadrature element (IWQE) method for analyzing non-homogeneous space truss structures. The present method combines the high accuracy of the traditional WQE method with the universality of the standard finite element (FE) method. In the analysis, the structure is divided into a series of non-homogeneous elements with large sizes, and discrete function values
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Dynamic Response of a Rotating Beam with Elastic Restraints in Forward Flight Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-05 Feiyu Wang, Zhu Su, Lifeng Wang
This paper presents the dynamic response of a rotating beam with elastic restraints in forward flight. The motion equations of the system are established by Hamilton’s principle. The structure model is established by Euler-Bernoulli beam theory. The influence of elastic restraints and centrifugal force is considered in the form of potential energy. The aerodynamic model is established by Greenberg
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Nonlinear Forced Vibration of Curved Beam with Nonlinear Viscoelastic Ends Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-05 N. Mohamed, S. A. Mohamed, M. A. Eltaher
This article develops a mathematical formulation to investigate the nonlinear forced vibration of curved viscoelastic beam with nonlinear viscoelastic boundary conditions around buckled position numerically, for the first time. The nonlinear integro-differential equation of buckling problem and the corresponding nonlinear nonhomogeneous boundary conditions are discretized by the differential integral
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Dynamic Modeling and Analysis of Soft Dielectric Elastomer Balloon Actuator with Polymer Chains Crosslinks, Entanglements and Finite Extensibility Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-05 Akhil Pratap Singh, Atul Kumar Sharma
Soft dielectric elastomers (SDEs) represent a category of intelligent electroactive materials utilized in electro-mechanical actuation technology. The dynamic performance of these materials during actuation is notably affected by intrinsic factors like crosslinks, entanglements and the limited extensibility of polymer chains. In this paper, we provide a theoretical framework for modeling the dynamic
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Nonlinear Analysis of an Extended Heterogeneous Lattice Hydrodynamic Model Considering on/off-Ramps Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-02-01 Rongjun Cheng, Xudong An, Yumin Cheng
To study the impact of on/off-ramps on traffic stability in heterogeneous traffic flow, a novel lattice hydrodynamic model was presented. The new model’s stability condition was determined using the linear stability analysis method. The theoretical results reveal that traffic flow stability is influenced by the proportion of vehicles with different maximum speeds and safe headway, as well as the presence
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Fracture Criteria and Crack Initiation Mechanism of Material Based on Configurational Stress Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-01-29 Chao Wang, Jili Feng
This study aims to build a new bridge between configurational stress/force and material fracture. The migrating control volume and thermodynamics are used to develop the Eshelby relation, and the relationship between the conservative integral in fracture mechanics and configurational stress/force for elastic or elastic-plastic materials is further clarified. Additionally, the configurational stresses
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Modeling and Analysis of a Thermo-Electro-Magneto-Viscoelastic Actuator Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-01-12 Asesh Kumar Patra, Aman Khurana, Deepak Kumar
This study examines the dynamics of a smart actuator known as a thermo-electro-magneto-viscoelastic plate. This type of actuator is made of an electro-magneto-active polymer filled with suitably added fillers, which enhance its performance. An energy-based dynamic model is derived to analyze the behavior of the actuator, taking into account thermal, electrical, and mechanical factors. The study uses
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Acoustic Characteristics of a Plate Silencer with a Flexible Back Cavity Under Arbitrary Boundary Conditions Int. J. Appl. Mech. (IF 3.5) Pub Date : 2024-01-05 S. W. Yuan, J. X. Hou, H. C. Zhu, J. L. Liao
The flexible back cavity (FBC) plate silencer is composed of an FBC and a flexible inner plate. Through the coupling of the sound field with the flexible inner and outer plates, the transmitted sound energy of the downstream is reduced, and it has a good broadband muffling effect at low frequencies. In order to obtain the transmission loss (TL) of the FBC plate silencer under arbitrary boundary conditions
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An Enhanced Circumferential Winkler Contact Force Model for Cylindrical Clearance Joints Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-21 Huaibo Yao, Lei Liang, Wenlai Ma, Huibo Zhang, Yang Zhao
In deployable space structures, the clearance size of joints is small, and the contact between the journal and bearing should sometimes be treated as a conformal contact, resulting in the imprecision of the contact force models in evaluating contact forces. This study proposes an enhanced hybrid theoretical and numerical contact force model to calculate the clearance joints’ contact force. Firstly
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Fractional-Order Rate-Dependent Piezoelectric Thermoelasticity Theory Based on New Fractional Derivatives and its Application in Structural Transient Response Analysis of Smart Piezoelectric Composite Laminates Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-15 Huili Guo, Fulin Shang, Tianhu He
Ultrafast heating technology (e.g., high-energy pulse-burst laser, laser-aided material processing, etc.) has been extensively used in micro-machining and manufacturing of piezoelectric devices (e.g., piezoelectric resonator, piezoelectric generators, etc.), and the related thermo-electromechanical coupling analysis becomes more significantly important. In recent years, although rate-dependent piezoelectric
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An Investigation of Free Vibration Characteristics of a DFG-CNTRC Thin Laminated Shell in Thermal Environment Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-14 Chaofeng Li, Xueyang Miao, Yuchen Pan, Kang Yang
A dynamic model of dual-functional gradient carbon nanotube-reinforced composite (DFG-CNTRC) laminated shell in a thermal gradient environment is established. The carbon nanotubes (CNTs) are supposed to be FG distribution in the functionally graded material (FGM) consisting of metal and ceramic components, and its traveling wave vibration in thermal gradient environment environments is studied. The
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Seismogram Synthesis of Multi-Scale Layered Transversely Isotropic Saturated Half-Space Using a Revised Stiffness Matrix Method Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-13 Zhenning Ba, Jiaqi Niu, Jianwen Liang, Ji Zhang, Zhanyuan Fu
Seismogram synthesis for a multi-scale transversely isotropic (TI) saturated layered half-space subjected to seismic dislocation source is studied by a revised stiffness matrix method in this paper. First, based on Biot’s theory of wave propagation in a fluid-saturated porous solid, the governing equations of motion in TI saturated medium are transformed by Fourier–Hankel integral transform. Next,
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A Crystal Plasticity Finite Element—Machine Learning Combined Approach for Phase Transformation Prediction in High Entropy Alloy Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-09 Mehrzad Soltani, Sanjida Ferdousi, Ravi Sankar Haridas, Rajiv S. Mishra, Yijie Jiang
The mechanical properties of an alloy depend on its microstructure. The strength-ductility trade-off is a paradigm that existed for a long time. Advanced alloys, such as high entropy alloys (HEAs), utilize a dual-phase strengthening mechanism, which originates from the microstructural phenomena consisting of twinning and phase transformation, to significantly improve their mechanical properties. To
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Investigation of Ductile Point-Contact Yield Strength and Bilinear Reinforced Elastic–Plastic Mechanical Behavior Model Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-07 Zhifeng He, Haibin Zhu, Shaopeng Ma
Ductile point-contact structures are widely used in engineering applications, with their yield strength and mechanical behavior directly related to the application safety of relevant engineering structures. The Hertz elastic contact theory can effectively express the mechanical behavior of a point-contact structure at the initial stage of load bearing. However, it cannot be applied when the structure
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Thermodynamic Constitutive Model of the Gas Hydrate-Bearing Sediments Considering Anisotropy Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-12-02 Lei Liu, Bo Zhou, Xiuxing Zhu, Haijing Wang, Yun Huang
Gas hydrate-bearing sediments (GHBS) are considered a significant potential energy source. However, the decomposition of hydrates can lead to various geological hazards. Therefore, a comprehensive investigation into the mechanical properties of GHBS is essential to ensure the safe extraction of gas hydrate. This paper presents a constitutive model for GHBS that incorporates anisotropy, based on the
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A New Analytical Approach for Nonlinear Global Buckling of Axially Compressed and Tensiled Sandwich Toroidal Shell Segments with CNTRC Coatings and Corrugated Core in Thermal Environment Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-27 Vu Hoai Nam, Do Thi Kieu My, Vu Minh Duc, Nguyen Thi Giang, Pham Thanh Hieu, Nguyen Thi Phuong
In this paper, the nonlinear global buckling and postbuckling responses of axially compressed and tensiled sandwich toroidal shell segments with functionally graded carbon nanotube-reinforced composite (FG-CNTRC) coatings and corrugated core in the thermal environment are investigated. Three distributed types of FG-CNTRC coatings with two geometrical types of corrugated core, and three shell types
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Optimization-Oriented EPC Approach for Analyzing the Stochastic Nonlinear Oscillators with Displacement-Multiplicative and Additive Excitations Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-16 Guo-Peng Bai, Guo-Kang Er, Vai Pan Iu, Chi Chiu Lam
This paper presents a new approach named optimization-oriented exponential–polynomial-closure (OEPC) to study the behavior of stochastic nonlinear oscillators under both displacement-multiplicative and additive excitations that are Gaussian white noise. In addition to the original projection exponential–polynomial-closure (PEPC) solution procedure, the OEPC method provides an alternative procedure
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An Explicit Modeling for the Pseudoelastic Response of Porous SMA Thick-Walled Cylinders under Internal and External Pressure Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-08 Nahid Enteshari, Seyed Ahmad Tajalli
Shape-memory alloy (SMA) structures, either dense or porous, are widely used because of their functional characteristics arising from shape-memory effect and pseudoelasticity. Hence, the precise modeling of these materials is essential due to design issues. In this study, the solution algorithm based on an explicit phenomenological constitutive model is investigated to analyze pressurized cylinders
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An Integral-Generalized Finite Difference Method for Interface Problems in Solid Mechanics Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-07 Huiling Ci, Wei Wang, Lu Shi, Bing Bai, Lei Wang, Jianfeng Liu, Yun Jia
Interface problems exist widely in various engineering problems and their high-precision simulation is of great importance. A new computational approach for dealing with interface problems is proposed based on the recently developed integral-generalized finite difference (IGFD) scheme. In this method, the research domain is divided into several subdomains by interfaces, and discretization schemes are
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Curved Electrostatic Nanobeams Incorporating Surface Energy Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-01 Mahmoud E. Khater
In this work, a study on curved electrostatically-actuated nanobeams incorporating surface energy is presented. The beam is modeled according to Euler–Bernoulli beam theory and the Gurtin–Murdoch theory of surface stress is used to incorporate surface energy effects in beam modeling. To verify the accuracy of the model, its predictions were compared to numerical results reported in previous literature
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An Epigenetic Bi-stability of Structural Metamaterials Undergoing Dual Matching Shape-memory Effects Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-01 Yuheng Liu, Haibao Lu, Dong-Wei Shu, Wei Min Huang, Ran Tao
With the development of structural metamaterials and 3D printing technology, the polymorphic shape-memory metamaterials have attracted extensive attention. This study aims to design a structural 3D printed shape-memory metamaterial, of which the epigenetic bi-stability of shape-fixity and recovery behaviors have been achieved by means of the dual matching nominal moduli and geometrical size optimization
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A Thermodynamic Strength Theoretical Model to Explain and Predict Pseudo-Ductility Behavior of SiCf/SiC Composite Material Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-11-01 Ze Xu, Yulan Liu, Biao Wang
In order to explain and predict the pseudo-ductility behavior and mechanical properties of SiCf/SiC composite material, a thermodynamic strength theoretical model based on fracture mechanics and thermodynamic method has been established. Compared with other theoretical models, the model proposed in this investigation unifies different cracks and defects based on energy method. Meanwhile, the stress–strain
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Vibration Investigation of Circular Graphene Sheet with Geometrical Defect Considering Two-Phase Local/Nonlocal Theory Exposed to the Magnetic Field Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-10-21 Pejman Ayoubi, Habib Ahmadi
In this work, the mixed local/nonlocal elasticity theory is developed for the investigation of the vibration of a circular graphene sheet with a structural defect located in a magnetic field. When graphene is placed in a magnetic field, the Lorentz force is applied to it, which is calculated using Maxwell’s equations. The insufficiency of Eringen’s nonlocal theory (ENT) caused some authors to employ
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A Rate-Temperature-Dependent Visco-Hyperelastic Constitutive Model for UD CF/PEEK Prepregs During a One-Step Hot Stamping Forming Process Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-10-19 Yan Lu, Yibo Li, Qiang Yue, Jingsong Liu, Yong Zhang, Lei Dong
An anisotropic visco-hyperelastic constitutive model for rate-temperature-dependent deformation during one-step hot stamping forming simulation of unidirectional (UD) CF/PEEK prepregs is presented. This constitutive model is based on strain energy decomposition and a multiplicative decomposition of the deformation gradient. Two simple Maxwell models are used to characterize the viscoelastic behavior
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Robust Topology Optimization of Coated Structures with Surface Layer Thickness Uncertainty Considered Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-10-14 Ran Li, Jingyu Hu, Shutian Liu
The rapid development of additive manufacturing has made coated structures an innovative configuration with high design flexibility. However, poor forming accuracy and surface roughness during manufacturing will cause uncertainty in surface layer thickness, which results in structure performance deviation and failure to achieve the expected goals. This paper proposes a robust topology optimization
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Vibration Instability of a Rotor in Axial-Field Permanent Magnet Motors with a Foundation Movement Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-10-14 Chunhua Xia, Shiyu Wang, Jixiang Wang, Zhenhang Wei
This paper investigates the effects of a foundation movement on the vibration instability of axial-field permanent magnet motors (AFPMM). Different from previous studies focusing on the effects of the rotor’s rotation on its vibration instability, this paper introduces a revolution around a space axis as the foundation movement and investigates its effect on the vibration characteristics of the rotor
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Peridynamics–FEM Coupling for Interfacial Delamination Effected by Vertical Crack Density in Thermal Barrier Coatings Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-10-14 Han Dong, Han Wang, Zhenwei Cai, Weizhe Wang, Yingzheng Liu
A coupling model of peridynamics and finite element method is proposed to study the interfacial delamination influenced by vertical crack density in thermal barrier coating (TBC) systems. Specifically, the progressive failure progress under static and fatigue loads in TBCs, including vertical cracks propagation, the evolution of vertical cracks to interfacial cracks, and interfacial delamination, is
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Stress and Deformation of a Functionally Graded Piezoelectric Rotating Disk with Variable Thickness Subjected to Magneto-Thermo-Mechanical Loads Including Convection and Radiation Heat Transfer Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-09-30 Mahdi Saadatfar, Mohammad Amin Babazadeh, Mojtaba Babaelahi
The stresses and deformations of a functionally graded piezoelectric material (FGPM) non-uniform thickness rotating disc under magneto-thermo-mechanical loads including convection and radiation heat transfer were examined in this paper. The material constants were considered to be a power-law function of radius. Also, the heat convection coefficient and heat conduction coefficient are functions of
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An Anisotropy Honeycomb Structure with Reinforced Deformability and Stiffness Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-09-30 Ning Feng, Shangbin Wang, Yuanhao Tie, Andras Biczo, Chongfu Huang, Weibo Xie
In this work, by breaking the structural six-fold symmetry and isotropy, we propose a simple design to drastically improve the elastic deformability and stiffness of gardenia-shaped honeycomb (GSH) structures, with a lower structural relative density. In the developed structural design, the enhancement of the mechanical response is achieved by locally shortening the beams that caused the intracellular
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Semi-Analytical Results for the Linear Nonaging Viscoelastic Contact Behaviors Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-08-22 Tuan Nguyen-Sy, Minh-Quan Thai, Ngoc-Minh Vu
This paper investigates the importance of creep and relaxation functions in modeling the Hertzian contact problem between linear nonaging viscoelastic materials and viscoelastic rough surfaces. We provide novel analytical and semi-analytical solutions to these functions for various materials, including Generalized Maxwell, Generalized Kelvin, and Burgers’ rheological materials. Closed-form and semi-analytical
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Impact Response Analysis on Orthogrid Stiffened Composite Sandwich Plates Embedded with Viscoelastic Material Considering Temperature and Moisture Effects Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-08-17 Wanbiao Fu, Fenfei Hua, Qingquan You, Xiaoqiang Zhou
In this work, a new composite sandwich plate including a viscoelastic material (VEM) filling orthogrid core is proposed. Taking temperature and moisture effects into consideration, the dynamic ‘analysis for impact responses of this structure is presented. The equivalent material properties of the composite core layer are calculated using the Halpin–Tsai model. In order to model the impact force between
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The Effect of Intrafibrillar Post-Yield Behavior on Fracture of Mineralized Collagen Fibril Arrays Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-08-17 Min Xu, Bingbing An, Dongsheng Zhang
Mineralized collagen fibrils (MCFs) are important building blocks of bone at the submicroscale, and the mechanical performance of MCF arrays has a great influence on fracture resistance of bone at large length scales. In this study, we carry out the analyses of fracture process in MCF arrays under tensile loading. The plastic deformation of extrafibrillar matrix (EFM), post-yield behavior of MCFs,
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3D Printing Holey-Column Metamaterial Structure Undergoing Tailorable Buckling Deformation of Local Instability Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-08-17 Yuheng Liu, Dong-Wei Shu, Haibao Lu, Ran Tao
3D printing metamaterial structures have attracted extensive attentions, due to their multifunctional, programmable and tailorable mechanical behaviors. Currently, the buckling behaviors of irregular and non-uniform metamaterial structures have become a prominent challenge due to their unstable deformations. In this study, we designed a 3D printed metamaterial structure with tailorable buckling behaviors
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New Fatigue Life Prediction Model for Composite Materials Considering Load Interaction Effects Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-08-08 Zihao Feng, Qiang Ma, Zongwen An, Huidong Ma, Xuezong Bai
Damage to composite structures can accumulate over time and lead to fatigue failure in their actual use environment. Therefore, it is critical to establish a suitable fatigue life prediction model. This work developed an improved fatigue life prediction model based on the effects of equivalent damage and load interactions. Validation and comparison of the improved fatigue life prediction model were
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Differential-Growth-Induced Center Wave Buckling Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-07-19 Zilu Wang, Cong Wang, Yingjie Wei
Morphogenesis is a result of complex biological, chemical, and physical processes in which differential growth in biological systems is a common phenomenon, especially notable in plant organs such as petals and leaves. Mechanisms of these biologic structures have been studied in recent years with a growing focus from the mechanics point of view. However, understanding differential-growth-induced shape
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Merging Acoustic Black Holes and Local Resonators to Enhance Vibration Attenuation in Periodic Metamaterial Beams Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-07-17 Xiaosong Zhu, Xiang Yu, Yongzhen Mi, Hui Zheng
This paper studies the bandgap properties and wave attenuation mechanisms of periodic beams embedded with a combination of acoustic black holes (ABHs) and local resonators (LRs). ABH refers to a retarding structure with a decreasing, power-lawed thickness profile, which gradually reduces the local phase velocity of incoming bending waves and thus traps the structural vibration energy within a confined
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A Pseudo-Lower Bound Solution of Structural Bearing Capacity by Bézier Extraction-Based Isogeometric Analysis Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-07-12 Hien V. Do, Phuc L. H. Ho, Canh V. Le, H. Nguyen-Xuan
This study proposes a pseudo-lower bound method for direct limit analysis of two-dimensional structures and safety evaluation based on isogeometric analysis integrated through Bézier extraction. The key idea in this approach is that the stress field is separated into two parts: fictitious elastic and residual, and then the equilibrium conditions are recast by the weak form. Being different from the
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Nonlinear Interaction Between an Elastic Wave and Charge Carriers in a Piezoelectric Semiconductor Rod Aroused by a Dynamic Axial Force at an Endpoint Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-07-10 Wanli Yang, Yuantai Hu
Wave-particle drag effect (WPDE) induced by the interaction between an elastic wave and the carriers in a piezoelectric semiconductor (PS) structure has already become a current hot issue in the field of acoustoelectric conversion. Most related studies are based on the linearized assumption that carrier concentrations are limited to present very small variations such that the nonlinear drift current
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Cohesive Zone Model to Investigate Complex Soft Adhesive Failure: State-of-the-Art Review Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-30 Zhuoran Yang, Yan Xia, Zhongmeng Zhu, Chengbin Yao, Han Jiang
Soft adhesives are widely used in soft robotics, biomedicine, flexible electronics and other fields. In practical applications, soft adhesives are frequently subjected to monotonic loading, static loading and cyclic loading. It is extremely important but challenging to analyze the failure behavior of soft adhesives due to their complicated mechanical properties and failure mechanisms, as well as the
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A Variational Formulation of Physics-Informed Neural Network for the Applications of Homogeneous and Heterogeneous Material Properties Identification Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-29 Chuang Liu, Heng An Wu
A new approach for solving computational mechanics problems using physics-informed neural networks (PINNs) is proposed. Variational forms of residuals for the governing equations of solid mechanics are utilized, and the residual is evaluated over the entire computational domain by employing domain decomposition and polynomials test functions. A parameter network is introduced and initial and boundary
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Moving Load Analysis of Laminated Porous Micro Beams Resting on Elastic Foundation Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-29 Şeref Doğuşcan Akbaş
This research highlights dynamic displacements of laminated porous micro beams resting on elastic foundation under moving load. In the constituted equation of laminated micro scaled beam, the modified coupled stress theory is used in order to determine the size effect. Each layer is considered as identical and porosity distribution and assumed as uniform. Lagrange technique is applied in achieving
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A Composite Analogy to Study the Linear Elasticity of a Pressurized Latex Tube with Application to a Mechanical Vocal Fold Replica Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-29 Annemie Van Hirtum, Mohammad Ahmad, Raphal Chottin, Xavier Pelorson
Mechanical deformable vocal fold replicas are an inherent part of physical studies of the fluid–structure interaction underlying vocal folds auto-oscillation during voiced speech sound production. In this context, the current work considers the linear stress–strain characterization of a pressurized latex tube vocal fold replica. An imaging approach is developed to measure the effective low-strain linear
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The Improved Irwin’s Model for Crack Problems in Power-Law Hardening Materials Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-21 Yufeng Huang, Hua Wang, Fenglin Guo
In this paper, an improved Irwin’s model for power-law hardening materials is established through the static equivalence between the linear elastic stress solution and the stress redistribution in the plasticity-affected zone (PAZ) under small-scale yielding (SSY) conditions. HRR solution is adopted to describe the stress field within the crack-tip plastic zone (CTPZ). Analytical expressions of the
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Modal-Based Analysis for Aiding 3D Elastic Metastructure Design Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-16 Minghui Zhang, Yi Xiao, Qing-Hua Qin
The engineered topological structures of the unit cell endow elastic metamaterials (EMMs) with the extraordinary capability to attenuate elastic waves. In real-life scenarios, a practical EMM (i.e., metastructure), consisting of a limited number of unit cells, is the truncation of the infinite EMM, which may detriment seriously the attenuation capability. To understand the mechanism behind the detriment
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A Deformation–Diffusion-Coupled Constitutive Theory for Hydrogels by Considering the Preparation Conditions Int. J. Appl. Mech. (IF 3.5) Pub Date : 2023-06-16 Shuai Xu, Zishun Liu
Hydrogels are excellent soft materials that can absorb large amounts of water and have applications ranging from biocompatible sensors to soft robots. Experiments have demonstrated that the equilibrium swelling state of hydrogels strongly depends on their preparation and external conditions, such as the as-prepared water content, cross-linking density, and temperature. However, traditional theories