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Consistent Meta-modelling approach for a less-conservative Reliability based Design of Shells against Buckling Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-11 Rohan Majumder, Sudib K. Mishra
Knock Down Factors (KDFs) are used to predict the drastic post-critical load drop in shells due to nonlinear modal interactions under geometric imperfections. However, the KDFs are over-conservative due to their lower bound estimation form the experimental dataset. Economic design should reconcile such deficit by nonlinear analysis of shells, aided with reliability, accounting random imperfections
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Enhanced multi-strategy bottlenose dolphin optimizer for UAVs path planning Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-11 Gang Hu, Feiyang Huang, Amir Seyyedabbasi, Guo Wei
The path planning of unmanned aerial vehicle is a complex practical optimization problem, which is an important part of unmanned aerial vehicle technology. For constrained path planning problem, the traditional path planning methods can not deal with the complex constraint conditions well, and the classical nature-inspired algorithms will find the local optimal solution due to the lack of optimization
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Exact solution for hygro-thermo-mechanical creep and recovery of viscoelastic laminated beam Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-10 Peng Wu, Jie Wang, Ding Zhou, Xiaolong Li, Kong Yue
In order to predict the creep and recovery behaviors of for viscoelastic laminated beam in hygro-thermo-mechanical (HTM) coupled condition, an exact analytical solution is proposed. This solution considers two effect mechanisms: temperature and humidity, including the expansion difference and the variation of viscoelastic properties. In the analytical model, the stresses and displacements of each lamina
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Global dynamics of a periodic brucellosis model with time delay and environmental factors Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-08 Xia Ma, Gui-Quan Sun
In China, brucellosis has always been a significant public health issue, especially in the pastoral regions of northern provinces where animal husbandry is well-developed. However, the impact of control measures, breeding characteristics and temperature fluctuations on the transmission dynamics of brucellosis outbreaks remains unclear. We construct a periodic mechanism-driven dynamic model with latent
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Exploring the impact of biocontrol and temperature variations on the population dynamics of Paracoccus marginatus Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-08 Martin Dountio, A. Nana Yakam, Samuel Bowong
The mealybug () is one of the most important pests of papaya (Carica papaya L.). The high potential damage of this pest threatens papaya production. The objective of this paper is to explore the impact of biocontrol and temperature variations on the population dynamics of . We propose a mathematical model for the dynamics of within a papaya field. This model consists of a time-delayed non-autonomous
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A thermo-chemo-mechanically coupled peridynamics for investigating crack behavior in solids Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-08 Yu Xiang, Bao Qin, Zhenjun Jiao, Zheng Zhong
In engineering applications, the phenomenon of cracking is often accompanied by a coupled multiphysics effect. Peridynamics (PD) is an effective approach for solving cracking problems, but currently, no general PD model accounts for the coupling of multiple physical fields. In this work, we develop a PD model of coupled deformation, heat conduction, species diffusion, and chemical reactions. First
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Statics and dynamics of pulley-driven tensegrity structures with sliding cable modeling Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-07 Shuo Ma, Muhao Chen, Yongcan Dong, Xingfei Yuan, Robert E. Skelton
This article introduces the concept of Pulley-Driven Clustered Tensegrity Structures (PD-CTS) and develops non-linear and linearized static and dynamic equations using the Lagrangian method. The generalized coordinates utilized in this framework comprise the nodal coordinates of the tensegrity structure and the string sliding distances. The governing equations are specifically constructed, considering
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A novel damped conformable fractional grey Bernoulli model and its applications in energy prediction with uncertainties Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-06 Nailu Li, Eto Sultanan Razia, Haonan Ba
Energy resources, such as oil, coal are important to people's life and the development of the economy. Predicting the energy consumption and production with uncertainties can help the government and policymakers make the reasonable energy strategy and give constructive guidance. In this paper, a novel damped conformable fractional accumulation operator with two parameters are proposed to have control
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Enriched nonlinear grey compositional model for analyzing multi-trend mixed data and practical applications Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-06 Hui Li, Naiming Xie, Kailing Li
The compositional data are interrelated, and analyzing the evolution of each component is crucial for understanding population dynamics. However, the complex structure and tedious process of modeling pose challenges to the reasonable construction of grey compositional models for analyzing multi-trend mixed data. To address this, a novel enriched nonlinear grey compositional model with global multi-parameter
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Condition monitoring of wind turbine faults: Modeling and savings Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-06 Henrik Hviid Hansen, Neil MacDougall, Christopher Dam Jensen, Murat Kulahci, Bo Friis Nielsen
This paper presents a case study on condition monitoring of power generators at offshore wind turbines. Two fault detection models are proposed for detecting sudden changes in the sensed value of metallic debris at the generator. The first model uses an exponentially weighted moving average, while the second monitors first-order derivatives using a fixed threshold. This is expected to improve the maintenance
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A hybrid smoothed-particle hydrodynamics model of oxide skins on molten aluminum Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-05 Joel T. Clemmer, Flint Pierce, Thomas C. O'Connor, Thomas D. Nevins, Elizabeth M.C. Jones, Jeremy B. Lechman, John Tencer
A computational model of aluminum melting is proposed which captures both the thermal fluid-solid phase transition and the mechanical effects of oxidation. The model hybridizes ideas from smoothed particle hydrodynamics and bonded particle models to simulate both hydrodynamic flows and solid elasticity. Oxidation is represented by dynamically adding and deleting spring-like bonds between surface fluid
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Image restoration based on transformed total variation and deep image prior Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-05 Limei Huo, Wengu Chen, Huanmin Ge
Most supervised learning methods require observation data and ground truth pairs as data sets to train the network. However, it is difficult and time-consuming to obtain a large number of high quality data sets, because ground truth is not available in some practical settings, such as medical imaging, dynamic scenes. Deep image prior (DIP) only uses one degraded image for image recovery tasks, which
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A bi-variant variational model for diffeomorphic image registration with relaxed Jacobian determinant constraints Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-05 Yanyan Li, Ke Chen, Chong Chen, Jianping Zhang
Diffeomorphic registration is a widely used technique for finding a smooth and invertible transformation between two coordinate systems, which are measured using template and reference images. The point-wise volume-preserving constraint is effective in some cases, but may be too restrictive in others, especially when local deformations are relatively large. This can result in poor matching when enforcing
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Reliability sensitivity analysis for water hammer-induced stress failure of fluid-conveying pipe Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-05 Congyi Zha, Chenrong Pan, Zhili Sun, Qin Liu
The water hammer, resulting from sudden valve closures or similar operations, is a primary cause of leakage and damage in fluid-conveying pipe systems. This work aims to investigate the reliability sensitivity of fluid-conveying pipes under the water hammer. A reliability model for the fluid-conveying straight pipe, involving uncertainty and fluid-structure interaction, is developed based on the stress-strength
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Modified score functions for von Mises regressions Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-04 Artur J. Lemonte
We derive and evaluate a novel estimation approach for the von Mises regression model based on a modified score function whose solution ensures an estimator with a smaller asymptotic bias than the original maximum likelihood estimator. We consider Monte Carlo simulation experiments to show that the new estimation approach yields nearly unbiased estimates. An application to real data is also considered
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Constructing of n-dimensional non-degenerate chaotic maps and its application for robust image encryption Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-02 Xilin Liu, Xiaojun Tong, Miao Zhang, Zhu Wang
Due to the limited hardware equipment resources, existing chaotic systems generally exhibit degradation, low complexity, and randomness, as well as simplifying biological coding regulations applied to encryption, bringing security flaws to encryption algorithms. To address these issues, a general method for constructing n-dimensional (ND) non-degenerate chaotic maps with any expected Lyapunov exponent
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Numerical analysis of thermal and mechanical characteristics with property maps in complex semiconductor package designs Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-03-02 Jeong-Hyeon Park, Hwanjoo Park, Taehwan Kim, Jaechoon Kim, Eun-Ho Lee
As semiconductor performance improves through advanced package designs, it becomes important to consider both thermal and mechanical properties. Better understanding their relationship enhances system design and optimization. This study has introduced a numerical method that takes into account both thermal and mechanical fluxes to construct thermal and mechanical property maps for practical application
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Contact analysis between a thermoelectric half-plane and a rigid solid with periodic surface Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-29 Yali Zhang, Yueting Zhou, Shenghu Ding
The solution of the contact problem with multiple contact areas between a thermoelectric device and a surface is crucial for the design and optimization of thermoelectric devices. This study focuses on the contact problem of a thermoelectric half-plane and a rigid solid with periodic wavy surfaces. The interface profile is represented by a periodic function, which is likely more accurate when addressing
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Aerothermoelastic flutter analysis of variable angle tow composite laminated plates in supersonic flow Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-28 Junqing Gong, Chuanzeng Zhang, Fengxian Xin
A theoretical model is developed to investigate the aerothermoelastic flutter behavior of variable angle tow (VAT) composite laminated plates on elastic foundation in supersonic flow with general boundary conditions. The equations of motion of the VAT composite laminated plate are established by adopting the first-order shear deformation theory and the supersonic piston theory. The composite laminated
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Topology optimization for flow machine rotor design considering resonance and low mass density flows Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-23 Diego Hayashi Alonso, Renato Picelli, Julio Romano Meneghini, Emílio Carlos Nelli Silva
When designing structures that take part in rotating fluid flow machines, one important effect that may be taken into account is resonance, which is evaluated through the modal analysis. Under rotating conditions, the formulation and behavior of the structure changes, requiring a new formulation. Thus, this work formulates the fluid flow topology optimization for rotating resonance, while also considering
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Efficient semi-analytic method for single tooth contact analysis of loaded spiral bevel gears Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-23 Peng Chen, Sanmin Wang, Haoran Zou
Accurately and fast calculation of single tooth load contact state of a gear pair is the basis for accurate calculation of multi-tooth load contact analysis. Therefore, this study proposed a semi-analytical quick single tooth load tooth contact analysis(Q-SLTCA) method. First, the ease-off tooth contact analysis(ease-off TCA) method was established, and a numerically stable initial contact stress distribution
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A closed-form expression of a ductile Fracture Limit Surface (FLS) for general plane stress deformation paths Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-23 Eun-Ho Lee, M.B. Rubin, Jae-Hyuk Lim, Namsu Park
Ductile fracture in metals is a complex phenomenon caused by the nucleation, growth, and aggregation of micron-sized voids. Existing theoretical models for fracture use experimentally determined Fracture Limit Curves (FLCs) in two-dimensional strain space, which require multiple curves to account for anisotropic effects. This paper proposes a practical closed-form analytical function for a Fracture
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Neural network models for the quaternion singular value decompositions Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-23 Baohua Huang, Wen Li
We develop two neural network models for computing the quaternion singular value decomposition (QSVD), which can be shown to arise as gradient flows or Riemannian-gradient flows on the product of Stiefel manifold over the quaternion skew-field and their geometric and dynamical properties are investigated. Numerical experiments including color image compression indicate the feasibility and effectiveness
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Multi-period reverse logistics network design for water resource management in hydraulic fracturing Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-22 Hao Li, Sibel A. Alumur
This paper addresses the effective management of water resources during the hydraulic fracturing process used for natural gas extraction. With increasing demand and scrutiny on shale gas production due to economic, environmental, and social factors, effective water management strategies are needed to address the challenges of flow-back water usage during hydraulic fracturing. This research contributes
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Modeling and analysis for coupled multi-zone flow of frac hits in shale reservoirs Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-22 Wendong Wang, Qian Zhang, Wenfeng Yu, Yuliang Su, Lei Li, Yongmao Hao
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A Fourier neural operator-based lightweight machine learning framework for topology optimization Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-22 Kaixian Liang, Dachang Zhu, Fangyi Li
The combination of machine learning and topology optimization has preliminarily mitigated the enormous computational costs incurred during optimization processes. Its powerful design capabilities are warmly welcomed by many scholars, but this strategy still faces many problems, such as unclear structural boundaries and high dependence on big data. Here, we propose a new machine learning topology optimization
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Singular integral based closed-form solutions for modified EMPS models in semipermeable magneto-electro-elastic materials Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-22 Ashish Kumar, Kuldeep Sharma, Tinh Quoc Bui
The singular integral equation method is applied to present analytical solutions for modified electric-magnetic-polarization saturation (EMPS) models subjected to semipermeable center cracked magneto-electro-elastic (MEE) materials. A generalized methodology is presented to explicitly solve the EMPS model under any arbitrary saturated electric and magnetic conditions using the distributed dislocation
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Calendar-time-based and age-based maintenance policies with different repair assumptions Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-21 Peng Liu, Guanjun Wang, Zhong-Heng Tan
Traditional maintenance models usually assume that the time duration required for conducting corrective repairs is negligible for mathematical tractability. In this paper, we propose two new preventive maintenance policies that take non-negligible repair time into consideration: One is a calendar-time-based maintenance policy in which a system should be preventively replaced at either of two predetermined
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Nonlinear analysis of flexoelectric acoustic energy harvesters with Helmholtz resonator Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-20 Z. Cao, K.F. Wang, B.L. Wang
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Phase-field method combined with optimality criteria approach for topology optimization Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-20 Yulong Wang, Tiantang Yu, Sundararajan Natarajan, Tinh Quoc Bui
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Economic order/production (EOQ/EPQ) quantity models with product recovery: A review of mathematical modelling (1967-2022) Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-20 M.Y. Jaber, J. Peltokorpi
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Analysis of size-dependent response of surface excited functionally graded layer with consideration of couple-stress effects Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-20 Tosporn Prasertsri, Wipavee Wongviboonsin, Jaroon Rungamornrat
This paper focuses on a theoretical examination of the mechanical behavior of elastic layers made of functionally graded (FG) materials. It particularly highlights the impact of material microstructures by utilizing the couple stress theory to introduce FG characteristics of the coating material across the thickness direction, along with size effects. The study distinctively addresses both surface
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An isoparametric inclusion model for determining the thermo-elastic fields produced by varying Eigen-temperature gradients Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-18 Pu Li, Jinran Li, Feodor Borodich, Dongfeng Li, Xiaoqing Jin
The existence of inclusions or inhomogeneities may disrupt heat flow, resulting in increased stresses and temperature fluctuations at the material interface. Analyzing the thermo-elastic fields surrounding such microstructures is crucial for unveiling the intricate failure mechanisms within materials. Based on the method of Green's function and contour integral, this work presents a complete set of
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Unified modeling for clay and sand with a hybrid-driven fabric evolution law Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-17 Kai Cui, Xiao-Wen Wang, Ran Yuan
This paper presents a novel critical state model for both clay and sand considering the inherent and induced anisotropy, named as CASM-h. The CASM-h model is developed based on the well-calibrated CASM model and incorporates the concepts of subloading surface and fabric anisotropy. To describe the induced anisotropy, a hybrid-driven fabric evolution law is proposed, defining fabric evolution as driven
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Rotation effects on propagation of shear horizontal surface waves in piezomagnetic-piezoelectric semiconductor layered structures Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-17 Lei Yang, Enrico Zappino, Erasmo Carrera, Jianke Du
In this work, the propagation characteristics of shear horizontal waves in a piezomagnetic and piezoelectric semiconductor layered structure with rotation are studied. The dispersion equation of shear horizontal waves in the rotating multiferroic composite semiconductor is obtained in the framework of coupled field theory including Coriolis and centrifugal forces. By solving the dispersion equation
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Symplectic solutions of the plane annular sectors in micropolar elasticity Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-16 Qiong Wu, Qiang Gao
The symplectic approach is utilized to derive the solutions of the plane annular sector in micropolar elasticity. According to the Hellinger-Reissner variational principle, the Hamiltonian canonical equations are obtained for the plane problem in an annular sectorial region. Through the method of separation of variables, we obtain an eigenvalue equation of the Hamiltonian operator matrix which is a
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Error approximation and bias correction in dynamic problems using a recurrent neural network/finite element hybrid model Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-15 Moritz von Tresckow, Herbert De Gersem, Dimitrios Loukrezis
This work proposes a hybrid modeling framework based on recurrent neural networks (RNNs) and the finite element (FE) method to approximate model discrepancies in time-dependent, multi-fidelity problems, and use the trained hybrid models to perform bias correction of the low-fidelity models. The hybrid model uses FE basis functions as a spatial basis and RNNs for the approximation of the time dependencies
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Method of Characteristics for transient, cylindrically-radial flows Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-10 Alan E. Vardy, Sjoerd W Rienstra, Honglin Wang
Cylindrical radiation of individual pulses is studied and strong differences from spherical radiation are highlighted. Prior to this study, the class of available analytical solutions for cylindrical radiation was rather limited. It included (i) a well-known solution for a steady-state, time-harmonic line source and (ii) the solution for a delta-pulse line source. The first of these has no analytical
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Application of perturbation-variation method in large deformation bimodular cylindrical shells: A comparative study of bending theory and membrane theory Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-10 Xiao-Ting He, Xiao-Guang Wang, Jun-Yi Sun
A bimodular material is a kind of material that presents two elastic moduli in tension and compression. In the existing researches, the bimodular effect of materials is rarely considered due to its complexity in analysis. In this study, the large deformation problem of bimodular cylindrical shells is analytically and numerically investigated, in which the typical issue in cylindrical shells, using
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The effects of Casimir, van der Waals and electrostatic forces on the response of nanosensor beams Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-10 Mehmet Akif Koç, İsmail Esen, Mustafa Eroğlu
The governing equations of the nanosensor beams have been modified to account for the non-local strain gradient effect, which considers the impact of material microstructure to capture the size-dependent behavior of the beams accurately. Additionally, surface and Casimir forces, which result from the interaction between the nanosensor beam and its environment, are deemed to be a precise representation
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Analysis on lubrication contact characteristics of imperfect transversely isotropic coating Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-09 Xin Pei, Wanyou Yang, Qinghua Zhou, Yutang Li, Shuang Liu
Lubricated contact characteristics of transversely isotropic coating considering imperfect interface is of great importance in engineering to provide guidance on tribological design and optimization of tribo-pairs. The current investigation reports an elastohydrodynamic lubrication (EHL) contact model for transversely isotropic coating of imperfect interface. The interface is described by dislocation-like
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Semi-analytical study on elastic field of two joined dissimilar materials with interfacial cracks under prescribed loading Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-09 Wanyou Yang, Qinghua Zhou, Jiaxu Wang, Boo Cheong Khoo, Nhan Phan-Thien
Existing interfacial cracks in two joined dissimilar materials play a crucial role in determining the stress concentration and its further propagation, which severely affects the interfacial strength of the bi-materials, even leading to its debonding failure under external loading. This study proposes a semi-analytical method (SAM) to analyze the elastic field of two joined dissimilar materials with
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Policy design of government subsidy for end-of-life solar panel recycling Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-08 Tiantong Xu, Diyi Liu, Lipo Mo
Solar photovoltaic systems can reduce carbon emissions by harnessing green energy from the sunlight, however, tremendous end-of-life solar panels may pose a threat to the local environment in the coming decades. What's worse, fewer regulations have been mandated to deal with the disposal of solar waste. To address this issue, this paper investigates a game-based, government-subsidized solar recycling
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An embedding approach to multilayer diffusion problems with time-dependent boundaries on bounded and unbounded domains Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-07 M. Rodrigo
A general multilayer diffusion problem subject to inhomogeneous boundary conditions with time-dependent boundaries is considered. The embedding method is used to find the analytical solution, which is expressed in terms of time-dependent functions that satisfy a system of linear Volterra integral equations of the first kind. A boundary element method is developed to numerically solve the integral equations
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Numerical simulation of the distributed-order time-space fractional Bloch-Torrey equation with variable coefficients Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-06 Mengchen Zhang, Fawang Liu, Ian W. Turner, Vo V. Anh
The purpose of this research is to establish the generalised fractional Bloch-Torrey equation for better simulating anomalous diffusion in heterogeneous biological tissues. The introduction of the distributed-order time fractional derivative allows for an improved interpretation of the complex diffusion behaviours with multi-scale effects. The use of variable coefficients in the model increases its
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Theoretical and experimental study on dynamic characteristics of L-shaped fluid-conveying pipes Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-05 Yuchen Guo, Hu Ding
In this study of fluid-conveying pipe dynamics, it is usually assumed that the shape of the pipe is straight. This paper establishes a flow-induced vibration model of an L-shaped pipe based on the absolute nodal coordinate formulation (ANCF), and mainly studies the effects of fluid velocity, structural parameters, and boundary conditions on the vibration characteristics of the pipe. The results show
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Solution and analysis of a continuum model of sonic black hole for duct terminations Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-05 Jie Deng, Oriol Guasch, Davide Ghilardi
The standard configuration of a sonic black hole (SBH) is a discrete set of rings with back cavities at a duct termination, whose inner radii decrease according to a power-law. Although several practical realizations of this type of slow-sound waveguide have been investigated, the continuous problem in which the number of ring/cavity sets goes to infinity has not been analyzed in depth. Understanding
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Understanding the impact of feedback regulations on blood cell production and leukemia dynamics using model analysis and simulation of clinically relevant scenarios Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-04 Rohit Kumar, Sapna Ratan Shah, Thomas Stiehl
Acute myeloid leukemia (AML) is a paradigmatic example of a stem cell-driven cancer. AML belongs to the most aggressive malignancies and has a poor prognosis. A hallmark of AML is the expansion of malignant cells in the bone marrow and the out-competition of healthy blood-forming (hematopoietic) cells. In the present study, we develop a nonlinear ordinary differential equation model to study the impact
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A unified bond–based peridynamic model without limitation of Poisson's ratio Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-01-29 Jinwei Guan, Li Guo
The issue of fixed Poisson's ratio is a critical problem plaguing bond–based peridynamic (BB–PD) models. The popular approach of introducing the bond's tangential stiffness cannot completely remove Poisson's ratio limitation, but instead leads to some additional troubles, such as negative tangential stiffness and bond force density misalignment in finite rigid body rotation problems. To address the
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The implicit stabilized dual-horizon peridynamics-based strain gradient damage model Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-01-28 Yehui Bie, Yueguang Wei, Timon Rabczuk, Huilong Ren
In this paper, we propose the implicit stabilized dual-horizon peridynamics-based strain gradient damage model (GDH-PD) to describe the cross-scale fracture behavior of materials. To this end, firstly, the strain energy density function of GDH-PD is reformulated by considering the energy compensation to eliminate zero-energy modes of the traditional higher-order peridynamics. And then, the constitutive
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ECDM: Enhanced edge based coupled deformable model for image segmentation in the presence of speckle noise and severe intensity inhomogeneity Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-01-30 Ankit Kumar, Subit K. Jain
Image segmentation is a crucial process in the field of computer vision, and deformable models for image segmentation have demonstrated remarkable efficacy among various techniques. These models have gained significant attention due to their ability to generate closed and smooth contours of target boundaries. Nevertheless, the conventional deformable models exhibit undesirable performance when confronted
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Adaptive predefined time neural filtered control design for an uncertain nonlinear system and application to flight control Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-02 Fang Wang, Chao Zhou, Changchun Hua
The paper studies the control problem of an uncertain nonlinear system with tracking error constraint, unknown nonlinear functions and unknown control input gains. An asymmetric barrier Lyapunov function composed with predefined time prescribed performance function is constructed to ensure tracking error enters into the predefined asymmetric constraint in a given time. Then radial basis function neural
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A fully coupled thermal–hydro–mechanical–chemical model for simulating gas hydrate dissociation Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-01 Li Zhang, Bisheng Wu, Qingping Li, Qingshuo Hao, Haitao Zhang, Yuanxun Nie
Due to high energy density and huge reserves, many trial projects worldwide have been conducted to exploit natural gas hydrates (NGH). However, most of them did not meet the commercialization requirements because of submarine hazards, low gas production and sand production. Therefore, it is important to investigate the NGH dissociation process. In this paper, a fully coupled multiphase, strongly nonlinear
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Nonlinear dynamic of the rod-fastening combined rotor system with rub-impact based on the Stribeck friction model Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-01 Chongyang Wang, Kai Wang, Zihang Li, Lihua Yang
This paper aims to analyze the dynamic behavior of the rod-fastening combined rotor(RFCR) system in a rub-impact state and proposes a rod-fastening rotor dynamics model based on the Stribeck friction model. This model offers advantages such as generating frictional forces based on relative velocities and considering the coupling effects of rub-impact under complex excitations, providing greater flexibility
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Cavitation effects near a sacrificial coating subjected to underwater explosion Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-01 Zeyu Jin, Haiting Yu, Xiangshao Kong, Caiyu Yin
The load resulting from cavitation collapse is a major threat to structures exposed to underwater explosions. Protective structures for warships, such as sacrificial coatings, which are sandwich structures attached to the wet face of the ship hull. They have energy absorbing cores made of cellular or composite materials that can significantly influence the effects of cavitation. In this study, a physical
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Semi-analytical solution for axisymmetric rheological consolidation under free strain conditions Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-02-01 Xudong Zhao, Nanning Guo, Wenzhao Cao, Yang Liu
Existing solutions for axisymmetric consolidation of viscoelastic soil are derived based on equal strain assumptions, which cannot account for soil deformation along the radial direction. This study develops a general solution for axisymmetric consolidation of viscoelastic soil under free strain conditions. The fractional‐derivative Merchant model is introduced into the governing equations to account
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Forced vibration analysis of beams with frictional clamps Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-01-26 Mertol Tüfekci, John P. Dear, Loïc Salles
This study investigates the vibration characteristics of rectangular cross-sectioned and straight beams with imperfect supports, focusing on the role of dry friction at the contact interfaces. The contact interactions are reduced to resultant point loads, and the friction at the contact interfaces is modelled using the Jenkins friction model, introducing nonlinearity into the system. These nonlinear
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Brezinski inverse and geometric product-based Steffensen's methods for a semi-blind image reverse filtering model Appl. Mathmat. Model. (IF 5.0) Pub Date : 2024-01-27 Guang Deng
This work develops extensions of Steffensen's method to provide new tools for solving the semi-blind image reverse filtering problem. Two extensions are presented: a parametric Steffensen's method for accelerating the Mann iteration, and a family of 12 Steffensen's methods for vector variables. The development is based on the notion of vector inverse defined by Brezinski and the geometric product.