Article
Materials Science, Multidisciplinary
Antonios Bouzakis, Georgios Skordaris, Konstantinos-Dionysios Bouzakis, Mehmet-Gokhan Gokcen, Apostolos Boumpakis, Ahmet-Ugur Batuk, Suleyman Sisman
Summary: This paper presents a new method for obtaining stress-strain and strain-rate curves of cemented carbide materials, which are widely used in tool manufacturing processes. The data obtained is relevant for various applications, including calculating stress and strain fields in cemented carbide tools under impact loads at different conditions.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Kai Yao, Xiaohua Min
Summary: This study systematically clarifies the instantaneous strain rate sensitivity (ISRS) and strain rate sensitivity of strain hardening (SRSS) in the {332} < 113 > Ti-15Mo alloy exhibiting TWIP effect. The results show that ISRS is positively correlated with the change in the dislocation activation volume, while SRSS is negatively correlated with the evolution of deformation microstructures.
Article
Geosciences, Multidisciplinary
Zhoujie Gu, Rongxi Shen, Zhentang Liu, Xin Zhou, Xiaoliang Li, Zesheng Zang, Li Zhang, Wei Liu, Xi Wang
Summary: By using the split Hopkinson bar system, the mechanical behavior and energy change of coal were analyzed, and it was found that cracks were produced along the axial direction of coal samples under dynamic loading. The damage degree of coal samples intensified gradually within a certain range of strain rate. A dynamic mechanical constitutive model considering the influence of strain rate was established, and the damage changes of coal samples were analyzed.
NATURAL RESOURCES RESEARCH
(2023)
Article
Polymer Science
Yu Chen, Hui Guo, Minqian Sun, Xiao Lv
Summary: Two types of polyurea materials were prepared and tested for their tensile properties under different strain rates. The mechanical behavior of the materials under dynamic and quasi-static loading was analyzed, and a dynamic visco-hyperelastic constitutive model was established. The research results showed that the tensile properties of polyurea were strain rate sensitive and exhibited different mechanical behaviors under different loading conditions.
Article
Polymer Science
Zhiying Zhao, Xiaodong Li, Hao Jiang, Xing Su, Xudong Zhang, Meishuai Zou
Summary: This study systematically investigates the compressive responses of polyurethane microcellular elastomers (PUME) with different densities (800 kg/m(3), 600 kg/m(3), and 400 kg/m(3)) under various strain rates. The compressive properties of PUME with different densities under compressive impact load are described, and it is found that PUME with a density of 600 kg/m(3) exhibits better performance. A visco-hyperelasticity-air constitutive model is established to describe the large deformation response of PUME at high strain rates. The constitutive model parameters are obtained and validated through experimental results, and it can provide data support for the simulation analysis and application of PUME as energy absorbing protective facilities.
Article
Materials Science, Multidisciplinary
Jason Allen, Hamid Garmestani
Summary: The Mechanical Threshold Stress (MTS) model is effective in predicting the material constitutive response for a wide temperature and strain rate range. However, it fails to capture the rapidly increasing yield stress at high strain rates and over predicts the flow stress behavior at yield and post yield. To address these issues, an alternative approach to fitting portions of the MTS model is explored and mathematical models are developed. The results show that with appropriate experimental data, the MTS model can be modified to accurately extend its applicability to high strain rate behavior and improve the modeling of initial flow stress behavior without changing its core functions.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Hui Zhu, Hengan Ou, Atanas Popov
Summary: A new phenomenological constitutive model is proposed to predict the mechanical behavior of thermoplastics, showing favorable predictions for different phases of flow stress behavior. It demonstrates improved accuracy compared to other existing models in representing the mechanical behavior of thermoplastics under a wide range of deformation conditions.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Physical
Luxin Guo, Rongxin Guo, Yong Yan, Yubo Zhang, Zhenhui Wang, Yifan Mu
Summary: This study investigated the dynamic compression mechanical properties of POM-fiber-reinforced concrete (PFRC) and the effect of fiber length on these properties. The results showed that POM fiber effectively improved the deformation ability and impact toughness of concrete. The fiber length had an influence on the dynamic compressive strength and toughness of PFRC, but had a minimal effect on the dynamic increase factor. The established damage dynamic constitutive model accurately described the dynamic characteristics of PFRC. This study provides valuable insights for the application of POM fibers in engineering structures subjected to impact loading.
Article
Chemistry, Physical
Shuling Gao, Guanhua Hu
Summary: An improved hydraulic servo structure testing machine was used to conduct biaxial dynamic compression tests on engineered cementitious composites (ECC). Both lateral pressure levels and strain rates were found to affect the failure strength and toughness index of ECC, with lateral pressure having a greater impact. The results also showed that the failure morphology of ECC was not significantly affected by strain rate.
Article
Construction & Building Technology
Ke Ma, Fuqiang Ren, Hailong Huang, Xiaohui Yang, Fasheng Zhang
Summary: This study investigates the dynamic mechanical properties and energy absorption mechanism of foam concrete (FC) through laboratory tests and analyses. The results show that peak stresses in FC have a linear relationship with strain rate, while density affects the dynamic mechanical properties and fluctuations of FC. Energy absorption is primarily achieved through compaction and expansion of pores, with the smallest density yielding the highest energy absorption rate (EAR). Axial pre-stress can enhance the EAR of FC, but excessive pre-stress leads to energy release.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Manufacturing
Erdong Wang, Jiahui Zhou, Xiao Guo, Man Gu, Huiran Wang, Wei Zhai
Summary: This study systematically investigates the mechanical behavior of metallic lattice structures based on triply periodic minimum surfaces under various loading rates. The results show that the lattice structures exhibit better densification strain resistance and enhanced energy absorption capabilities under dynamic compression. The rate-dependence of the lattice base material dominates at medium strain rates, while the inertia effect becomes notable at higher strain rates. An empirical formula is introduced to predict the shock stress responses, and constitutive models with strain-rates are proposed for uniform and graded lattices.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Construction & Building Technology
Jia-Bao Yan, Yiteng Geng, Peng Xie, Jian Xie
Summary: This paper investigates the mechanical behaviors of SS 316L at different low temperatures through tension tests. The results show that the stress-strain curves at low temperatures behave differently, and the material's ductility is reduced. Empirical models were developed to estimate the strength and hardness of SS 316L at low temperatures, and their validity was validated.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Lan Rao, Ling Wang, Yun Zheng
Summary: This paper experimentally investigated the mechanical properties of coral concrete with different strength and different polyvinyl alcohol (PVA) fiber content under compression. The results showed that adding an appropriate amount of PVA fiber could improve the mechanical properties of coral concrete, especially its toughness. A piecewise function model was selected to describe the stress-strain relationship of coral concrete, which was consistent with the experimental curve and its characteristic points. Experimental validations confirmed the accuracy of the selected constitutive model.
Article
Thermodynamics
Xin Wang, Tao Jiang, Chong Ji, Changxiao Zhao, Yuting Wang, Zhenru Gao
Summary: The stress-strain relationship of 6063-T5 aluminum alloy was investigated at different temperatures and strain rates. Quasi-static tensile tests and high temperature split Hopkinson pressure bar (SHPB) tests were conducted, and the effects of temperature and strain rate on the mechanical properties of the alloy were discussed. It was found that the alloy exhibited temperature softening and strain rate hardening effects, with strain rate softening effects occurring under certain temperature conditions. Fracture morphology and metallographic structure analysis were carried out, and a modified Johnson-Cook constitutive model was obtained to accurately predict the mechanical behavior of the alloy under high temperature and dynamic conditions.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2023)
Article
Engineering, Mechanical
Wenning Chen, Sijia Li, Krishna Singh Bhandari, Shahid Aziz, Xuewen Chen, Dong Won Jung
Summary: As an intelligent global optimization method, the genetic algorithm has high potential for improving flow behavior modeling and analysis. A phenomenological model named Arrhenius-type (A-T) was established to describe the flow behavior of Al-Mg AA5005 alloy, and a genetic optimized A-T (GA-T) model with higher precision was obtained. A genetic optimized BP-ANN (GBP-ANN) model was designed to reduce computing power consumption and achieve high accuracy flow behavior description.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Z. He, W. Qiu, Y. -N. Fan, Q. -N. Han, H. -J. Shi, X. Ma
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2018)
Article
Engineering, Mechanical
Shao-Shi Rui, Yi-Bo Shang, Yue Su, Wenhui Qiu, Li-Sha Niu, Hui-Ji Shi, Shunsaku Matsumoto, Yasuharu Chuman
INTERNATIONAL JOURNAL OF FATIGUE
(2018)
Article
Nanoscience & Nanotechnology
Shao-Shi Rui, Yi-Bo Shang, Ya-Nan Fan, Qi-Nan Han, Li-Sha Niu, Hui-Ji Shi, Keita Hashimoto, Nobuyoshi Komai
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Engineering, Mechanical
Qi-Nan Han, Wenhui Qiu, Zhiwu He, Yue Su, Xianfeng Ma, Hui-Ji Shi
TRIBOLOGY INTERNATIONAL
(2018)
Article
Physics, Applied
Xiaoxiong Song, Lisha Niu
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Engineering, Mechanical
Xiao-Xiong Song, Yi-Bo Shang, Hui-Ji Shi, Li-Sha Niu, Zhao-Xi Wang
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2019)
Article
Engineering, Mechanical
Yue Su, Qi-Nan Han, Cheng-Cheng Zhang, Hui-Ji Shi, Li-Sha Niu, Guo-Jian Deng, Shao-Shi Rui
TRIBOLOGY INTERNATIONAL
(2019)
Article
Energy & Fuels
Zhihao Shang, Liang Dong, Lisha Niu, Huiji Shi
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)
