Article
Engineering, Civil
Mohit Gupta, Harpreet Singh, Ashraf Nawaz Khan, Puneet Mahajan, R. T. Durai Prabhakaran, R. Alagirusamy
Summary: A novel ply based non-linear material constitutive model is proposed for mechanical characterization of plain woven composite, with the ability to decouple plasticity and progressive damage effects. The study on basalt plain woven composite plays a crucial role in understanding the material properties through mechanical characterization and experiments.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Chemical
Wenguang Nan, Wei Pin Goh, Mohammad Tarequr Rahman
Summary: An improved linear model for elasto-plastic and adhesive contact is developed, with new correlations proposed and validated for key parameters estimation. The newly proposed contact model is applied to analyze single particle contact behavior upon impact and bulk particle flow behavior, showing a more cohesive behavior when contact plastic deformation is considered.
Article
Engineering, Mechanical
Benjamin C. Cameron, C. Cem Tasan
Summary: This article presents a system of partial differential equations (PDEs) to calculate the full-field stress from an observed kinematic field when the flow rule governing the plastic deformation is unknown. These equations generalize previously proposed equations that assume pure plastic behavior without elasticity. A method to numerically solve these equations is also presented.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Agricultural Engineering
Vadym Chibrikov, Piotr Mariusz Pieczywek, Justyna Cybulska, Artur Zdunek
Summary: This study examines the effect of hemicellulose addition on the elasto-plastic response of BC-hemicellulose composite films. The results show that different types of hemicellulose and their concentrations have opposite effects on the plastic deformation, maximum stress, and maximum strain of the composite films.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Materials Science, Multidisciplinary
Wentan Zhu, Wensheng Liu, Yunzhu Ma, Shangru Meng, Jianning Wang, Youteng Duan, Qingshan Cai
Summary: The impact toughness of W-Ni-Fe alloys with different W content was studied, and the relationship between impact toughness and microstructural parameters was discussed. The results showed that with increasing W content, the elongation decreased, while the tensile strength and yield strength slightly increased. The impact toughness was mainly controlled by crack initiation energy, which decreased with increasing W content, while the crack propagation energy remained relatively low and constant. These findings provide important insights into the impact failure behavior of WHAs.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Jinhui Wang, Lei Zhang, Peipeng Jin, Lijia Chen, Xiaoguang Yuan, Hongbin Ma
Summary: The dynamic mechanical behaviors of the as-extruded Mg-1Al-6Y alloy were investigated using split Hopkinson pressure bar (SHPB). The results revealed that the microstructures and deformation mechanisms of the extruded alloy are sensitive to the strain rates and temperatures. The yield strength and compressive strength of the alloy are improved with increasing strain rate and weakened with increasing temperature. Temperatures have a significant influence on the dynamic mechanical behaviors of Mg-1Al-6Y.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Qiang Lin, Shenghui Jiang, Haidong Tian, Haohao Ding, Wenjian Wang, Jun Guo, Qiyue Liu
Summary: This paper studied the influence of plastic deformation layer and crack of rail roller on Magnetic Barkhausen Noise (MBN) signals. A detection equipment based on MBN signals was built and used to detect and characterize the rail plastic deformation layer and cracks. Experimental results showed that MBN signal decreased with the increase in plastic deformation layer thickness, and the formation of cracks led to an abnormal increase in MBN signal due to the release of residual compressive stress.
Article
Engineering, Multidisciplinary
Jizhong Zhao, Peilin Fu, Xu Zhang, Liucheng Zhou, Ping Wang, Qianhua Kan
Summary: This study proposes an effective calculation method for elastoplastic contact pressure and contact patch size under arbitrary smooth and continuous contact conditions. The accuracy and applicability of the method are evaluated by comparing predicted results with finite element simulations, showing high calculation accuracy and general applicability for different contact materials and body sizes.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Mechanics
Fabio Rollo, Angelo Amorosi
Summary: This paper examines the elastoplastic coupling phenomenon in solids, such as soils and rocks, from a thermodynamic-based constitutive modelling perspective. A new formulation considering isotropic and rotational hardening is proposed to illustrate two forms of isotropic and anisotropic elasto-plastic coupling for clays. The thermodynamic approach allows for a more detailed understanding of the phenomenon, particularly in terms of its effects on the yield domain and flow rules.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Metallurgy & Metallurgical Engineering
Wei Wei, Chao-long Yuan, Ren-dong Wu, Wei Jiao, Ding-chuan Liang
Summary: The constitutive relationship is crucial for optimizing material processing technology and product quality, requiring precise and generalized constitutive models. The constitutive model of 25 steel considers various thermal-mechanical state variables, covering the full strain range, and characterizes the influence of strain on material constants through polynomial fitting.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Physical
Wangyang Zhang, Jian Chen, Chenglong Wang, Di Liu, Linbo Zhu
Summary: This paper investigates the flattening contact behavior of an elastic-perfectly plastic hemisphere pressed by a rigid plane using the finite element method. The study compares and analyzes the behavior influenced by different elastic moduli, Poisson's ratios, and yield strengths in a wide range of interference values. The study proposes a new elastic-plastic constitutive model to predict the contact area and load in the elastic-plastic range and verifies its rationality compared to previous models and experiments.
Article
Engineering, Electrical & Electronic
Yunshuai Chen, Pengyang Li, Jian Sun, Miao Shang, Limin Shao
Summary: In this study, a fractal model of thermal-elastic-plastic contact normal load is established based on fractal theory. The effects of temperature difference on the joint surface properties are investigated through numerical simulations.
Article
Materials Science, Multidisciplinary
Xuli Liu, Yidong Wu, Yansong Wang, Jinbin Chen, Rui Bai, Lei Gao, Zhe Xu, William Yi Wang, Chengwen Tan, Xidong Hui
Summary: This study presents a new type of NiCoFeCrMoW high entropy alloys (HEAs) with enhanced deformability and strength. The phase structure, quasi-static tensile, dynamic compression, and deformation mechanism of these HEAs were systematically investigated. The results show that FCC or FCC + mu dual phases were formed in the HEAs, depending on the content of Mo and W and the annealing temperature. The HEAs exhibited excellent quasi-static tensile and dynamic compression properties, and the dynamic deformation mechanism was attributed to the regulation of stacking fault energy and Peierls barrier, leading to the formation of abundant nanoscale deformation twins and microbands during high strain rate compression. The synergistic microbanding and twinning effectively contributed to the enhanced dynamic deformability and strengthening effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Huang Xing, Liu Quan-sheng, Bo Yin, Liu Bin, Ding Zi-wei, Zhang Quan-tai
Summary: This study establishes an elasto-plastic and viscoplastic damage constitutive model for the short- and long-term dilatancy and fracturing behavior of soft rock squeezing deformation. The model takes into consideration both the transient and time-dependent damage and fracturing and has been validated in a coal mine.
JOURNAL OF MOUNTAIN SCIENCE
(2022)
Article
Engineering, Civil
T. Zeng, Z. B. Liu, C. J. Jia, Y. Yao
Summary: The elasto-plastic behavior of Fontainebleau sandstone is investigated using experimental and numerical methods. A refined continuous strain deviation method is proposed to accurately define the elastic parameters, and other internal state variables are determined accordingly. Important findings include the decrease of Poisson's ratio with increasing confining pressure and the relationship between friction-like coefficient and plastic volumetric strain.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)