Article
Engineering, Civil
Marcelo S. Medeiros, Leonardo Goncalves Ribeiro
Summary: Pipe elbows, also known as pipe bends, are crucial in reducing reaction forces and moments within a piping system. This study presents the effect of in-plane bending on the plastic limit loads of Functionally Graded (FG) pipe bends using finite element analysis and a micromechanical constitutive model. The results show that FG elbows exhibit distinct behavior in terms of limit moments and stress distribution compared to homogeneous elbows made of metal. An analytical model to estimate the limit moment of FG elbows is also proposed.
THIN-WALLED STRUCTURES
(2022)
Article
Polymer Science
Mohamed A. Eltaher, Ahmed Wagih, Ammar Melaibari, Ghazi S. Alsoruji, Mohamed A. Attia
Summary: This paper presents computational and empirical indentation models to investigate the elastoplastic response of FG substrate under an indention process with a spherical rigid punch, aiming to explore the applicability of new advanced functionally graded materials (FGMs) in numerous tribological systems. The spatial variation of the ceramic volume fraction and the effective properties of the FGM are evaluated using power law and sigmoid functions and a modified Tamura-Tomota-Ozawa (TTO) model. Bilinear hardening behavior is considered, and a finite element procedure is developed for prediction and analysis. Model validation with experimental works is performed, and numerical studies illustrate the influence of various factors on the contact pressure, stresses, displacements, and permanent plastic deformation. The present model can aid engineers and designers in choosing an optimum gradation function and index for their applications.
Article
Materials Science, Multidisciplinary
Yi Cheng, Kaifu Zhang, Biao Liang, Hui Cheng, Ping Liu
Summary: Based on an incremental sequential homogenization scheme, this paper investigates the elastoplastic behavior of composites with functionally graded interphase. The effective tangent moduli of the composites under infinitesimal strain load are obtained through a multi-coated model and homogenization process. The influences of interphase thickness/yield stress and reinforcement aspect ratio/volume fraction on the elastoplastic behavior of the composite are studied, showing that the interphase and reinforcement enhance the load capacity by changing the elastic and plastic strain distributions within each phase.
MECHANICS OF MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Witold Ogierman
Summary: This study introduces a two-stage hybrid homogenization approach which efficiently provides solutions for materials with arbitrary volume fraction of reinforcement, and is highly beneficial for two-scale modeling of nonlinear functionally graded materials and structures.
ENGINEERING COMPUTATIONS
(2021)
Article
Mathematics, Applied
Zheng Liu, Gaofeng Wei, Shaopeng Qin, Zhiming Wang
Summary: A new meshfree method, RRKPM, based on RBFs and RKPM is proposed for solving elastoplastic problems of FGMs, which offers greater accuracy and convergence advantages. The applicability and reliability of RRKPM are validated through examples and comparison with RKPM and FEM solutions.
APPLIED MATHEMATICS AND COMPUTATION
(2022)
Article
Engineering, Civil
Jun Xie, Pengpeng Shi, Fengjun Li
Summary: This paper presents exact solutions for the elastic, partially plastic, and fully plastic deformation of FG pressure vessels under mechanical loads. The study shows that the elastoplastic response of FG pressure vessels is notably affected by the radial variation of the material properties, and proposes design recommendations to prevent yielding under excessive circumferential stresses.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
S. Lucarini, L. Cobian, A. Voitus, J. Segurado
Summary: An FFT framework suitable for lattice based materials is proposed and evaluated for its performance compared to FEM solutions. The adapted Galerkin approach combined with Voigt surface smoothening was found to be the best FFT framework in terms of accuracy, numerical efficiency, and h-convergence. FFT becomes competitive with FEM in terms of numerical efficiency for cells with relative densities above approximately 7%.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Renan M. Barros, Evandro Parente Jr, Marcelo S. Medeiros Jr
Summary: The objective of this study is to assess the influence of micromechanical homogenization schemes on the critical buckling load of functionally graded plates. The numerical findings show that micromechanical models and kinematic theories have a considerable effect on the critical buckling load of functionally graded plates, in addition to slenderness, gradation, and materials properties。
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Lin Qiu, Ji Lin, Fajie Wang, Qing-Hua Qin, Chein-Shan Liu
Summary: This method proposes a simple and effective way to solve inverse heat source problems in functionally graded materials, eliminating the need for mesh generation, numerical integration, iteration, regularization, and fundamental solutions. The heat source problems are solved directly by calculating a linear matrix system, making it easy to program and implement.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Construction & Building Technology
Ziyan Hang, Yucheng Fan, Jinlong Yang, Chuang Feng, Jie Yang, Shuguang Wang
Summary: This paper investigates the mechanical properties of functionally graded graphene nanoplatelet reinforced cement composites (FG-GNPRCCs). The results show that the flexural strength and maximum compressive load of functionally graded distributions are significantly increased compared to uniform distribution. A parallel triple-inclusion model is developed to predict the Young's modulus of GNPRCCs, considering the effects of GNP dispersion, agglomeration, and pores. The cracking load for FG-GNPRCCs is also evaluated, providing reference for the design and optimization of high-performance cement composites and structures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Rhodel Bengtsson, Mahmoud Mousavi, Reza Afshar, E. Kristofer Gamstedt
Summary: In this study, a numerical multiscale model is used to investigate the effect of softwood's hierarchical structure on its macroscopic viscoelastic properties. The model is validated using creep behavior experiments on Norway spruce and Japanese cypress. The results demonstrate that by assuming that the variability is greater at the microstructural level, it is possible to predict the macroscopic creep behavior based solely on microstructural parameters, saving time and cost compared to characterizing creep in all material directions.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Mechanical
A. M. Eldeeb, Y. M. Shabana, A. Elsawaf
Summary: This paper evaluates the thermo-elastoplastic behaviors of rotating sandwich nonuniform thickness annular discs made of functionally graded materials. The temperature dependency of the constituent materials influences the disc behaviors significantly. Increasing the number of layers and/or decreasing the angular speed can enhance the disc performance.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Kemal Arslan, Recep Gunes, M. Kemal Apalak, J. N. Reddy
Summary: The geometrically nonlinear and elastoplastic behavior of a circular FGM plate subjected to mechanical loading-unloading conditions is investigated using a three-dimensional finite element method. The study examines the influences of nonlinearity, load parameter, thickness-to-radius ratio, and material composition on the mechanical behavior of the FGM plate. The results show that a combination of geometrical and material nonlinearities significantly affects the nonlinear mechanical behavior of the FGM plate under plastic deformation.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mathematics, Applied
Lin Qiu, Minghui Zhang, Qing-Hua Qin
Summary: This paper introduces a scheme derived from the homogenization function for solving the time-fractional inverse heat conduction problem in three-dimensional functionally graded materials. The method is validated for accuracy, efficiency, and convergence through two examples, demonstrating its effectiveness without the need for traditional meshing, integration, and regularization techniques.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Chemistry, Physical
Dan Chen, Lisheng Liu, Liangliang Chu, Qiwen Liu
Summary: This work examines a general mathematical model for functionally graded heterogeneous equilibrium boundary value problems, and presents a methodology for finding the local problems and effective properties of functionally graded materials using the asymptotic homogenization method. The research is of great reference significance for future material optimization design.
Article
Energy & Fuels
Qiliang Lin, Yi-Chung Chen, Fangliang Chen, Tejav DeGanyar, Huiming Yin
Summary: The platform achieves self-powered sensing in building envelopes through thermoelectric energy harvesting and optimizing energy consumption, maximizing harvested energy from building envelopes and optimizing energy consumption of the wireless sensing unit.
Article
Engineering, Multidisciplinary
Chunlin Wu, Liangliang Zhang, Gan Song, Huiming Yin
Summary: This paper extends previous work to evaluate elastic fields and effective modulus of composites with arbitrarily shaped inhomogeneities. The proposed method uses Eshelby's equivalent inclusion method and domain discretization to handle singularities, and achieves high accuracy through closed-form integrals. It is particularly suitable for cross scale modeling and virtual experiments.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Engineering, Mechanical
Huiming Yin
Summary: The continuum particle model correlates the interatomic potential of a crystal lattice with the elastic moduli of the solid by modeling discrete atoms using continuum particles. This model simplifies the calculation process and provides effective elasticity results. It can be applied to various lattices and extended to polycrystals using orientational averaging, providing a clear physical and mechanical correlation from interatomic potential to elasticity.
JOURNAL OF ENGINEERING MECHANICS
(2022)
Article
Construction & Building Technology
Xiaokong Yu, Mehdi Zadshir, Jessie Ruixuan Yan, Huiming Yin
Summary: This study investigates the effects of adding additives such as carbon nanotubes and graphene nanoplatelets to asphalt binders/concrete on their thermal-physical and rheological properties. A method to evaluate the distribution of these additives in asphalt materials is developed.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Chunlin Wu, Liangliang Zhang, Junhe Cui, Huiming Yin
Summary: The boundary element method is enhanced by introducing the three dimensional fundamental solution of bi-materials, allowing for efficient analysis of elastic properties in bi-material systems. The method avoids the need to solve multi-domain problems and establishes boundary integral equations for finite bi-layered materials with a plane interface. The single domain BEM saves computational effort, predicts interface singularities analytically, and is particularly useful for simulating layered materials in various applications.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Construction & Building Technology
Mehdi Zadshir, Fangliang Chen, Xiaokong Yu, Xin He, Irene Nigro, Maddalena Ricciarelli, Filippo Ubertini, Huiming Yin
Summary: This paper investigates the mixing of carbon nanotubes with asphalt binder through a foaming process to produce high-performance warm mix asphalt. The study shows that a small amount of CNTs can effectively enhance bubble stability without significantly increasing the rheological properties of the foamed asphalt. Additionally, the use of CNTs can improve the thermal conductivity of foamed samples.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Engineering, Mechanical
Chunlin Wu, Liangliang Zhang, Huiming Yin
Summary: This paper extends Eshelby's problem of one inhomogeneity embedded in a homogeneous infinite domain to a bimaterial infinite domain. The equivalent inclusion method (EIM) was used to simulate the inhomogeneity of an inclusion with a polynomial eigenstrain. The algorithm is particularly suitable to simulate a defect in thin film-substrate systems or other similar bilayered materials.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Energy & Fuels
Linda G. Teka, Mehdi Zadshir, Huiming Yin
Summary: This paper investigates a new stiffening mechanism for BIPV panels by imposing horizontal constraints along the supporting edges, which aims to reduce the deflection of the panels and improve their structural design.
Article
Mechanics
Chunlin Wu, Huiming Yin
Summary: When a bi-material with two jointed dissimilar half-planes containing an arbitrarily shaped polygonal inclusion is subjected to heat flow, the thermoelastic fields can be derived using the Green's function technique. The dual equivalent inclusion method (DEIM) is applied to handle the material mismatch, and the full thermoelastic fields can be obtained by integrating over the heat exchanger. The method can be used for a thin film containing a heat exchanger of arbitrary shape as either a heat sink or source.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Huiming Yin
Summary: The recently developed singum model was extended to predict the effective elasticity of lattice metamaterials and composites. The equilibrium of singums and the relation between averaged stress and strain variations were considered to evaluate the elasticity. It was found that the stiffness of any unit cells is the same as that of the primitive cell. A generalized formulation was developed to accurately calculate the effective elasticity, and a honeycomb lattice displayed a negative Poisson's ratio under a pre-tension.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Engineering, Mechanical
Huiming Yin
Summary: The recently published simplified singum model has been improved by using the thermodynamics-based equation of state (EOS) of solids to derive a new interatomic potential based on elastic constants. The finite deformation formulation under hydrostatic load has been used to evaluate the pressure-volume (p-v) relationship for the EOS of a solid. The improved singum model shows higher accuracy in predicting elastic properties and can be extended to other types of lattices with better accuracy.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Chunlin Wu, Tengxiang Wang, Huiming Yin
Summary: This paper applies the bi-material thermoelastic fundamental solution to analyze the elastic and thermal problems of spherical heat storage tanks. It solves the issue of stress transfer between the tanks and soil, which may cause deformation and destruction of the tanks. It also proposes a dual equivalent inclusion method to simulate material mismatch and uses analytical domain integrals to handle inhomogeneities without meshing.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Multidisciplinary Sciences
C. L. Wu, L. L. Zhang, H. M. Yin
Summary: This paper investigates the mechanical behaviour of a bi-layered panel containing many particles and demonstrates the size effect of particles on the deflection. The inclusion-based boundary element method (iBEM) is used to consider a fully bounded bi-material system. The study uses the fundamental solution for two-jointed half spaces to obtain the elastic fields resulting from source fields over inclusions and performs boundary-avoiding multi-domain integral along the interface. The paper also applies Eshelby's equivalent inclusion method to simulate the material mismatch with a continuously distributed eigenstrain field over the equivalent inclusion. The eigenstrain is expanded at the centre of the inclusion, providing adjustable accuracy based on the order of the polynomial of the eigenstrain. The iBEM algorithm used in this research is particularly suitable for conducting virtual experiments on bi-layered composites with defects or reinforcements, for both local analysis and homogenization purposes. The study explores the maximum deflection of solar panel coupons under uniform vertical loading, considering inhomogeneities of different material properties, dimensions, and volume fractions. It highlights the significant role played by the size of defects or reinforcements in the deflection of the panel, especially for thin substrates.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Civil
Linda Teka, Liming Li, Huiming Yin
Summary: Controlling the deflection of the PRT structure is crucial for riding comfort and energy efficiency. This study presents a new mechanism of stiffening the structure using horizontal support through nonlinear elastic analysis. The effect of the tensile axial force in mitigating overall deflection is highlighted, especially for thin, long beams. Experimental results showed that applying horizontal constraints or axial forces reduced the maximum deflection by 38% to 87% under elastic load range. The developed Green's function can be used in structural design to handle arbitrary transverse loads. Additionally, a smart cushion system was invented to provide horizontal support to the guideway of the aerial PRT structure.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Chao Liu, Huiming Yin
Summary: When a cubic lattice packaged by a boundary layer is subjected to a mechanical and temperature load, the force and length change of the bonds are evaluated by the average stress and strain of the unit cell. The variation of stress related to the strain variation provides the effective stiffness of the material at the corresponding configuration. The effective elasticity and thermal expansion coefficient can be tailored by the prestress through the boundary layer, which generates a configurational stress. The design method of lattice-based materials confined in a spherical shell is demonstrated to achieve zero thermal expansion and a positive temperature derivative of elasticity, by controlling the bond length changes with the prestress of the boundary layer.
MATERIALS & DESIGN
(2023)
Article
Mechanics
Zhiqiang Meng, Xu Gao, Hujie Yan, Mingchao Liu, Huijie Cao, Tie Mei, Chang Qing Chen
Summary: This paper presents a cage-shaped, self-folding mechanical metamaterial that exhibits multiple deformation modes and has tunable mechanical properties, providing multifunctional applications in various fields.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hasan Murat Oztemiz, Semsettin Temiz
Summary: Sandwich panel composites have various applications and their mechanical behavior and performance depend on material properties and geometry. The load-carrying capacity of S-core composite sandwich panels increases with the increase of the core wall thickness, but decreases with the increase of the core height.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yang Sun, Wei Zhang, Weipeng Hu, Mabao Liu
Summary: The study presents a novel computational framework to investigate the effect of graphene percolation network on the strength-ductility of graphene/metal composites. It utilizes the Cauchy's probabilistic model, the field fluctuation method, and the irreversible thermodynamics principle.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Elaheh Kazemi-Khasragh, Juan P. Fernandez Blazquez, David Garoz Gomez, Carlos Gonzalez, Maciej Haranczyk
Summary: This study explores group interaction modelling (GIM) and machine learning (ML) approaches for predicting thermal and mechanical properties of polymers. ML approach offers more reliable predictions compared to GIM, which is highly dependent on the accuracy of input parameters.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yafei Yin, Shaotong Dong, Dong Wu, Min Li, Yuhang Li
Summary: This paper investigates a bending-induced instability in sandwiched composite structures, and establishes a phase diagram to predict its characteristics. The results are of great significance in understanding the physical mechanisms of bending instability and providing design guidelines for practical applications.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Dhairya R. Vyas, Sharen J. Cummins, Gary W. Delaney, Murray Rudman, Devang V. Khakhar
Summary: In this study, multiple collisions of granules on a substrate are analyzed using Collisional Smooth Particle Hydrodynamics (CSPH) to understand the influence of impact-induced deformation on subsequent collision dynamics. It is found that the collision dynamics are dependent on the impact location and the deformation caused by preceding impacts. The accuracy of three theoretical models is also evaluated by comparing their predictions with CSPH results, and it is discovered that these models are only useful for predicting collisions at the same location repeatedly.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Xiang-Nan Li, Xiao-Bao Zuo, Liang Li, Jing-Han Liu
Summary: A multiscale mechanical model is proposed to quantitatively describe the macro-mechanical behavior of fiber reinforced concrete (FRC) based on its multiscale material compositions. The model establishes the stiffness and strength equations for each scale of FRC and demonstrates the influence of steel fiber parameters on the mechanical properties of FRC.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Vicente Ramirez-Luis, Hilario Hernandez-Moreno, Orlando Susarrey-Huerta
Summary: In this paper, a Multicell Thin-walled Method is developed for studying the stress distributions in multimaterial beams. This method accurately obtains complex stress fields while reducing the solution time and computational cost. Validation with the finite element method confirms the accuracy of the proposed method.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yanfeng Zheng, Siyuan Li, Jingyao Zhang, Yaozhi Luo
Summary: This study proposes an enhanced simplified model based on finite particle method (FPM) to consider the link cross-sectional size and contact in Bennett linkages. The model introduces virtual beams and contact forces to accurately simulate the real-world behavior of Bennett linkages. The proposed method is effective for dynamic analysis of large-scale deployable Bennett linkages and shows great potential.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Viktoriya Pasternak, Heorhiy Sulym, Iaroslav M. Pasternak
Summary: This paper investigates anisotropic elastic, magnetoelectroelastic, and quasicrystal solids and presents their equations of time-harmonic motion and constitutive relations in a compact and unified form. A matrix approach is proposed to derive the 3D time-harmonic Green's functions for these materials. The effects of phason field dynamics on the phonon oscillations in quasicrystals are studied in detail. The paper provides a strict proof that the eigenvalues of the time-harmonic magnetoelectroelaticity problem are all positive. It also demonstrates the application of the obtained time-harmonic Green's functions in solving boundary value problems for these materials using the derived boundary integral equations.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Jan Tomec, Gordan Jelenic
Summary: This paper investigates the relationship between different formulations and contact-force models in beam-to-beam contact mechanics. It specifically addresses the recently developed mortar method and develops its variant based on the penalty method. The developed elements are tested using the same examples to provide an objective comparison in terms of robustness and computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hanbin Yin, Yinji Ma, Xue Feng
Summary: This paper investigates the peeling behavior of a viscoelastic film bonded to a rigid substrate and establishes a theoretical peeling model. The study reveals three typical relationships between the peeling force and peeling velocity, which depend on the viscous dissipation within the film and the rate-dependent adhesion at the interface. Additionally, factors such as film thickness, interfacial toughness, and interfacial strength are identified as influencing the steady-state peeling force.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Peter Noe Poulsen, John Forbes Olesen
Summary: Finite Element Limit Analysis (FELA) is increasingly used to calculate the ultimate bearing capacity of structures made of ductile materials. This study presents a consistent and general weak formulation based on virtual work for both the lower and upper bound problem, ensuring uniqueness of the optimal solution. A plane element with linear stress variation and quadratic displacement field is introduced, showing good results for load level, stress distribution, and collapse mechanism even for coarse meshes in verification and reinforced concrete examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
