Article
Computer Science, Interdisciplinary Applications
Haibo Liu, Tianran Liu, Peixun Yang, Siqi Wang, Xingjian Liu, Yongqing Wang, Te Li
Summary: In this study, the elastic constitutive relation is reestablished based on anharmonic interatomic forces and microscopic finite strain. The explicit expressions of nth-order elastic constants are obtained using the Taylor expansion method. Additionally, an acoustoelastic constitutive model is derived based on the second-order elastic constitutive relation, and its accuracy is verified through molecular dynamics simulations. The results demonstrate that anharmonic interatomic potential is essential for higher-order elastic constitutive relation and acoustoelastic effect.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Mechanics
Eligiusz Postek, Zdzislaw Nowak, Ryszard B. Pecherski
Summary: The study focuses on the deformation of oxygen-free high conductivity copper, investigating the strain rate hardening effect through numerical simulations. It is found that the strain rate hardening effect is essential for the load-carrying capacity of the material under study. The analysis begins with Taylor impact test of a solid cylinder before proceeding to the metallic foam analysis.
Article
Multidisciplinary Sciences
Alexander Kovalev, Alexander E. Filippov, Stanislav N. Gorb
Summary: Biological materials, such as soft tissues, bones, wood, or foam-like medulla in bird feathers, can be considered as cellular materials. A simple 2D numerical model based on Voronoi diagrams is used to investigate how structural parameters influence the physical properties of cellular materials. The preliminary simulations show that increasing wall thickness increases energy dissipation and increasing cell density increases average stress.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Engineering, Mechanical
Shuai Chen, Guotang Zhao, Shuai Liu, Ping Wang, Hengyu Wang
Summary: The difference between the wear mechanism and microstructure evolution of near-surface material at the corrugation peaks and troughs was investigated. The depth of corrugation gradually increased and slowed down at high running cycle numbers. Plastic deformation and changing wear mechanisms were observed near the rail surface. The yield stress and constitutive relation of the material were found to vary with the development of corrugation.
Article
Mechanics
Catalin R. R. Picu, Vineet Negi
Summary: Many engineering materials made from fibers undergo compression during fabrication, leading to stiffening due to the formation of fiber contacts. The relation between stress and fiber volume fraction follows a power law form, with input from the structural evolution of mean segment length. In this study, we redefine mean segment length to be exclusively defined by fiber contacts that transmit load. Numerical simulations of compressed fiber assemblies reveal a relationship of rho similar to 1/l(c)(2) at large strains, contradicting purely geometric considerations of rho similar to 1/l(c). These findings have implications for stress-fiber volume fraction relations, with n=3 when rho similar to 1/l(c) and n=2 for rho similar to 1/l(c)(2) in pre-stressed networks. Experimental data comparisons validate these predictions.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Geological
Dongjie Hua, Qinghui Jiang
Summary: The presence of joints greatly affects the mechanical behavior of rock mass. To address highly fractured jointed rock mass, a continuum approach is commonly adopted. In this study, a general continuum model incorporating a fourth-rank compliance tensor for joints is proposed to describe the mechanical behavior of jointed rock mass. The proposed model takes into account the stiffness, areas, and orientations of joints, and is applicable for joints of arbitrary shape. It is verified by comparisons with in situ tests and numerical simulations.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Geochemistry & Geophysics
A. Sainoki, A. K. Schwartzkopff, L. Jiang, H. S. Mitri
Summary: The study presents a method to simulate the complex stress state inside fractured rock mass in fault damage zones, which can evaluate the severity of seismic activity. The analysis suggests that the discrepancy between local and regional fracture densities is a key factor in producing stress anomalies. Additionally, a parametric study on fracture properties provides insight into abnormal stress states in jointed host rock and fault damage zones.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Review
Mechanics
Qian Guo, Wenjin Yao, Wenbin Li, Nikhil Gupta
Summary: This paper reviews constitutive models used in finite element analysis for assessing the structural performance of composite materials, categorizing them into four groups and discussing their applications. Adaptations to finite element models are necessary for accurate and efficient performance in the complex environments that composites are used in. Recent years have seen progressive development in finite element models for composite materials.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Sandipan Paul, Alan D. Freed
Summary: In this study, a constitutive model for elastic-plastic materials is developed using scalar, conjugate, stress-strain, base pairs in a finite deformation setting. The alternative QR decomposition of the deformation gradient allows for direct measurement of Laplace stretch and its plastic contributions. This model has implications for the construction of constitutive models for a wider class of materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Xiao Jian, Liu Yongning, Li Yong, Qiu Guibao, Liu Jinming
Summary: The Model Equation Method (MEM) is a novel technique for measuring the porosity of porous materials, demonstrating applicability in the production of titanium foams. Results showed high consistency between MEM and traditional methods, with a strong linear correlation between porosity and spacer content. The study establishes mathematical relationships between mechanical properties and spacer content, highlighting the importance of MEM in controlling titanium foam properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Mechanics
Sandipan Paul, Alan D. Freed, Laszlo Szabo
Summary: In this paper, the Eshelby energy-momentum tensor is studied using QR kinematics, which is obtained by upper-triangular decomposition of the deformation gradient. The paper introduces the relationship between driving force attributes and dissipative strain attributes, and proposes a method for constitutive formulation. Furthermore, a classical plasticity model is derived to illustrate the role of driving force attributes.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Shun Meng, Haroon Imtiaz, Bin Liu
Summary: This paper proposes a new method to express the strain energy density functions using ordered principal stretches, which can flexibly match experimental curves without initial guessing. For incompressible materials, a 3D constitutive relation can be obtained from single uniaxial stress-strain experimental curve via interpolation, predicting other experimental curves reasonably well.
EXTREME MECHANICS LETTERS
(2021)
Article
Engineering, Geological
Yao Yang, Quan Jiang, Jian Liu, Hong Zheng, Dingping Xu, Jun Xiong
Summary: A study was conducted on the mechanical response of jointed rock masses, and an equivalent constitutive model was established to analyze their mechanical performance during the excavation period. The model considered the deformation characteristics and connectivity of the joints, and the joint compliance tensor and equivalent elastic compliance matrix were calculated to establish the model for rock masses with multiple joint sets. The proposed model and numerical simulation were used to analyze the unloading failure mechanism of jointed rock masses in the underground caverns of Jinping II hydropower station, based on field investigation and monitoring data.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Review
Chemistry, Physical
Girolamo Costanza, Dinesh Solaiyappan, Maria Elisa Tata, Dominique Baillis
Summary: Cellular solids are materials made up of piled cells with solid edges or faces. They have special characteristics such as being lightweight, insulation, cushioning and energy absorption. Compared to bulk solids, cellular solids have lower density, thermal conductivity, stiffness and compressive strength, offering enormous potential for applications in lightweight and rigid components, thermal insulation and energy absorption.
Article
Materials Science, Multidisciplinary
Feng Zhu, Xinyi Xiao, Min Liu, Chao Zhu, Yu Tian, Sheng Zou
Summary: This paper investigates the influence of cell sizes of cellular substrates on the elastic stretchability of stretchable electronics, finding that the appropriate cell size ratio yields significantly larger elastic stretchability. This finding provides an engineering design regulation for stretchable electronics based on cellular substrates.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
T. Zhang
JOURNAL OF ELECTRONIC MATERIALS
(2015)
Article
Energy & Fuels
T. Zhang
Article
Thermodynamics
T. Zhang
ENERGY CONVERSION AND MANAGEMENT
(2016)
Article
Engineering, Electrical & Electronic
T. Zhang
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Thermodynamics
Tinggang Zhang
Article
Agricultural Engineering
T. Zhang
BIOMASS & BIOENERGY
(2012)
Article
Agricultural Engineering
T. Zhang
BIORESOURCE TECHNOLOGY
(2013)
Article
Chemistry, Physical
T. Zhang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2011)
Article
Chemistry, Physical
T. Zhang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2011)
Article
Chemistry, Physical
T. Zhang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2011)
Article
Biotechnology & Applied Microbiology
T. Zhang
JOURNAL OF BIOTECHNOLOGY
(2013)
Article
Multidisciplinary Sciences
Tinggang Zhang
Summary: This study found an optimal combination of transport properties of thermoelectric materials at low doping concentration, leading to a new thermocouple design with significantly improved efficiency and power output.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Tinggang Zhang
Summary: An electrostatic voltage is proposed to enhance the output power and efficiency of a thermocouple. The numerical simulation shows that this voltage can increase the output power and efficiency up to four times compared to the original design. Furthermore, adjusting the emitter doping density can further improve the performance of the thermocouple.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Tinggang Zhang
Article
Engineering, Multidisciplinary
T. Zhang
COGENT ENGINEERING
(2015)
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)