Article
Engineering, Geological
Shi-Feng Lu, Shi-Jin Feng, Qi-Teng Zheng, Zhen-Bai Bai
Summary: This paper introduces a numerical model based on the theories of mass, momentum, and energy conservation for describing the long-term behavior of landfilled municipal solid waste. The model was validated through comparisons between experimental results and simulations, demonstrating its effectiveness in capturing the complex processes involved in MSW degradation.
Article
Engineering, Mechanical
Bin Li, Yi Cui, Shuo Liu, Rining Huang, Yan Fu, Zhanming Ding
Summary: A coupled plasticity-damage model is developed for predicting the burst speed and failure displacement of turbine materials under different stress states and operating temperatures. Experimental validation demonstrates that the proposed model performs better than traditional constitutive models in terms of prediction accuracy.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Optics
Akifumi Ogiwara, Hiroshi Kakiuchida
Summary: The study demonstrates that using speckle patterns can provide a simple fabrication method of PDLC diffusers with controllable scattering properties, which are suitable for smart window solar-ray control applications.
Article
Geochemistry & Geophysics
Jian Yang, Li-Yun Fu, Bo-Ye Fu, Zhiwei Wang, Wanting Hou
Summary: This study investigates the thermally coupled constitutive relations for elastic moduli and material constants of geologic materials using axisymmetric fields, and formulates thermoelastic equivalent constitutive equations under the generalized Hooke's law. The study reveals that thermal stresses, internal moisture evaporation, and internal rock compositions significantly affect the experimental results of solid rocks exposed to high temperatures.
JOURNAL OF GEOPHYSICS AND ENGINEERING
(2021)
Article
Engineering, Aerospace
Zhenyu Yuan, Wenwen Zhao, Zhongzheng Jiang, Weifang Chen
Summary: Efforts have been made to develop computational models for predicting non-equilibrium flow in hypersonic flows. A generalized hydrodynamic equations (GHE) and a nonlinear coupled constitutive relations (NCCR) model have been proposed for this purpose. The NCCR model shows better accuracy in predicting non-equilibrium phenomena compared to the Navier-Stokes equation, especially in the near continuum region. The importance of the chemical reaction source term in the NCCR model is also demonstrated through comparisons with different gas models.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Vit Prusa, Kumbakonam Ramamani Rajagopal, Alan Wineman
Summary: We investigate the pure bending of an elastic prismatic beam, considering density-dependent material parameters. The derived formulae allow for a quick assessment of the impact of density-dependent material parameters on predicted deformation, enabling a decision on their importance in the given setting.
MATHEMATICS AND MECHANICS OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
K. R. Rajagopal
Summary: In this note, a constitutive relation linear in both the Cauchy stress and linearized strain is developed by linearizing implicit constitutive relations between stress and deformation gradient. The developed constitutive relations include classic linearized elastic constitutive approximation and some classes implying limiting strain in tension, as special subclasses, with material moduli dependent on density. This allows for the description of responses in porous materials undergoing small deformations, such as porous metals, bone, rocks, and concrete.
MATHEMATICS AND MECHANICS OF SOLIDS
(2021)
Article
Engineering, Electrical & Electronic
Shengjia Wang, Yingjie Feng, Shuai Gao, Pengyuan Shi, Jianxuan Xiong, Pengfei Huang, Jiabin Wang, Zhan Gao, Sijin Wu, Weimin Sun
Summary: Proposal of a mechanical quantity sensing framework based on fiber-coupled common-path shearography for simultaneous measurement of deformation and slope. Optical fiber is used to generate holograms without breaking the common-path structure. Features include zero-approaching shear amount, separate control of spatial carriers, and scrambled reference wave. Single-shot phase measurement scheme is implemented by the spatial carrier method. Fiber scrambling is used to enhance the phase map quality. Physical principle demonstrated, and preliminary experiments verify the feasibility and functionality of the framework.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Geological
Feixiang Zhao, Shichun Chi
Summary: By studying the breakage characteristics of rockfill particles, a gradation evolution model was proposed to predict the evolution of the gradation curve, and an elastoplastic constitutive model incorporating the gradation evolution model was developed to predict the stress-strain behavior and gradation evolution of limestone rockfill triaxial specimens.
Article
Construction & Building Technology
Jose Luis Gomez-Royuela, Almudena Majano-Majano, Antonio Jose Lara-Bocanegra, Thomas P. S. Reynolds
Summary: This study comprehensively characterized European beech subjected to three different intensities of heat treatments, revealing that the heat treatment influenced the elastic behavior of the material with non-uniform trends among the elastic components.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Samarjeet Kumar, Vishesh Ranjan Kar
Summary: This study focuses on the nonlinear fully-coupled thermoelastic solutions of bidirectional porous functionally graded doubly-curved panels. The effects of curvature ratio, power-law, and porosity indices on the deflections and temperature-profile are demonstrated. Mixed hardening/softening nonlinearity behaviors are observed for the coupled thermoelastic responses of bidirectional FGM curved panels.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Chemical
Jia-Yu Liang, Yue-Ming Li, Erich Bauer
Summary: The paper presents a macro-microscopic coupled constitutive model for fluid-saturated porous media, taking into account the compressibility of the solid skeleton, real solid material, and fluid phase. The model is derived based on porous media theory and is consistent with the second law of thermodynamics. Two sets of independent variables are introduced to describe the coupled behavior between the compressibility of the solid skeleton and real solid material. The proposed model utilizes five independent variables and the linearized version is compared with other models, showing that Biot's model can be derived from it.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Engineering, Aerospace
Shuhua Zeng, Zhiqiang He, Wenwen Zhao, Weifang Chen
Summary: In this paper, a computational strategy for the NCCR model under the unstructured FVM-CFD framework is proposed. By adding the time derivatives of non-conserved variables to the NCCR model, the efficiency of the model for engineering applications is improved. Numerical tests show that the newly-developed NCCR solution has better accuracy and computational performance compared to existing solutions. The results indicate that this computational strategy has the potential to be a promising engineering tool for modeling rarefied non-equilibrium flows.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Bicheng Guo, Feng Jiang, Lan Yan, Ningchang Wang, Hui Huang, Fuzeng Wang, Hong Xie
Summary: This study established a material constitutive model for 42CrMo quenched and tempered steel, predicting the types of chips under different cutting conditions by considering the balance of strain strengthening and temperature softening.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Multidisciplinary
Ivan Sergeichev, Boris Fedulov, Alexey Fedorenko, Konstantin Zershchikov, Evgeny Lomakin, Iskander Akhatov
Summary: This study proposes the use of short-fiber thermoplastic polymer composite to produce equipment for the transportation of chemicals and dangerous goods. A constitutive material model was developed to describe the nonlinear elastic and elastoplastic behavior of the material. The model was verified through standard tests and additional stress state test data, and implemented in the ABAQUS finite element solver for practical usage.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Materials Science, Multidisciplinary
Baihong Chen, Changyue Liu, Zengting Xu, Zhijian Wang, Rui Xiao
Summary: In this study, both polydomain and monodomain liquid crystal elastomers (LCEs) were synthesized and their shape change with temperature under a certain stress level was characterized. A thermo-order-mechanical coupling model was developed to predict the shape change of LCEs, showing good consistency with experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Peng Wang, Fei Xu, Yiding Wang, Jun Song, Cheng Chen
Summary: This study investigates the interplay of super-screw dislocations and coherent twin boundary (CTB) in Ni3Al using molecular dynamics simulations and dislocation continuum theory. Various interaction mechanisms are observed depending on the stress and dislocation gliding pathways. A continuum model framework is developed to evaluate the critical shear stress required for CTB to accommodate dislocations along different pathways, considering the effects of anti-phase boundary (APB) and Complex Stacking Fault (CSF). The study suggests that the resistant force of CTB against all gliding dislocations is a more appropriate metric for quantifying its strength.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Chenyu Du, Haitao Cui, Hongjian Zhang, Zhibin Cai, Weikuo Zhai
Summary: A thermal-elastoplastic phase field model was developed to simulate thermal fatigue crack growth. The accuracy and availability of the model were verified through typical examples. The results indicate that the proposed model effectively simulates the process of thermal fatigue crack propagation in elastoplastic solids. The appropriate regularization length needs to be determined based on experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
J. Carlsson, A. Kuswoyo, A. Shaikeea, N. A. Fleck
Summary: The sensitivity of the compressive strength of a polymeric Kelvin lattice to the presence of an epoxy core is investigated both experimentally and numerically. The study shows that the epoxy core prevents the formation of crush bands in the lattice and changes its deformation mode. At finite strain, the strength of the lattice is degraded by bending failure and cracking of the struts and adjacent core, leading to the formation of vertical fissures.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Saptarshi Paul, Anurag Gupta
Summary: In this study, we investigate the geometry and mechanics of the buckled orthotropic von Karman elastic plate with free boundary condition, in the presence of an isolated positive or negative disclination. The shape of the buckled plate is cone-like for a positive disclination and saddle-like for a negative disclination. With increasing orthotropy, the shape of the buckled plate becomes more tent-like and the Gaussian curvature spreads along the ridge of the tent. The stress fields are focused in the neighborhood of the defect point and the ridge, indicating that most of the stretching energy is accommodated in these singular regions.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Antu Acharya, Vikram Muthkani, Anirvan DasGupta, Atul Jain
Summary: This study proposes filler-based and infill-based strategies for creating auxetic lattices with enhanced stiffness. The elastic properties of the sinusoidal re-entrant honeycomb lattice are developed and validated using finite element models. Parametric studies are conducted to find combinations leading to enhanced stiffness with minor loss in auxeticity. The results demonstrate the possibility of achieving a significant increment in stiffness while retaining significant auxeticity. The proposed approaches outperform existing approaches in terms of stiffness and auxeticity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Biswajit Pal, Ananth Ramaswamy
Summary: This study presents a multi-scale approach to simulate the shrinkage and creep of concrete, addressing the limitations of existing macroscopic prediction models due to the heterogeneous nature of concrete. The model is validated with experimental data and compared to national codes and macroscopic models, demonstrating its effectiveness in overcoming the gaps in existing models.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Akash Kumar Behera, Mohammad Masiur Rahaman, Debasish Roy
Summary: Ceramics have attractive properties but low fracture toughness is a major drawback. There is interest in improving the mechanical performance of ceramics by tailoring residual stresses. However, there is a lack of computational models that can accurately predict crack paths and quantify the improved fracture toughness.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bineet Kumar, Sandeep Kumar Dubey, Sonalisa Ray
Summary: This study aims to develop an energy-based theoretical formulation for predicting the evolution of the fracture process zone in concrete under fatigue loading. Experimental results and calibrations indicate that the specimen size and aggregate size affect the fracture behavior and process zone length of concrete.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zheliang Wang, Hao Sheng, Xinyi Lin, Yifan Rao, Jia Liu, Nanshu Lu
Summary: In this study, an analytical framework is proposed for investigating the behavior of laminated beams with any number of layers under various bending conditions, and the theory is validated through finite element analysis. It was found that the number of layers, applied deformation, layer properties, and layer aspect ratio have an impact on the equivalent flexural rigidity.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Michael Schwaighofer, Markus Konigsberger, Luis Zelaya-Lainez, Markus Lukacevic, Sebastian Serna-Loaiza, Michael Harasek, Florian Zikeli, Anton Friedl, Josef Fussl
Summary: In this study, nanoindentation relaxation tests were re-evaluated on five industrial lignins extracted from different feedstocks. It was found that the viscoelastic properties of all tested lignins were practically identical and independent of the feedstock and the extraction processes.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tian Han, Dandan Qi, Jia Ma, Chaoyang Sun
Summary: In this study, a generative design method was used to propose new modified lattice structures suitable for tensile and compressive loading conditions. By conducting experimental and finite element analyses, it was confirmed that the derived structures have improved load-bearing capacity and energy absorption compared to the original structures. The effects of shape parameters on mechanical properties were also discussed.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wenbin Zheng, Jay Airao, Ramin Aghababaei
Summary: Spinodal decomposition of Ti1-xAlxN crystal structure significantly affects their physical properties. This study uses three-dimensional molecular dynamics simulations to investigate the phase transformation mechanism and surface finish during material removal in TiAlN. The simulations reveal that the aluminum content and cutting depth have a significant influence on the phase transformation process through spinodal decomposition.
MECHANICS OF MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Atasi Ghosh
Summary: The micro-mechanism of low cycle fatigue deformation behavior has been summarized and the recent development in the approach of numerical simulation of cyclic stress-strain behavior of polycrystalline metallic materials at multi-scale has been discussed.
MECHANICS OF MATERIALS
(2024)
