Article
Metallurgy & Metallurgical Engineering
Xiang-tao Zhang, Yi-zhao Gao, Yu-zhen Yu, Xiang-nan Wang, Zheng-gang Zhan
Summary: Rockfill materials are widely used in various construction projects due to their high density, good compaction performance, strong water permeability, small settlement deformation, and high bearing capacity. Developing a reasonable constitutive model is crucial for engineering computation and analysis, and offers great potential for further development.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Computer Science, Interdisciplinary Applications
Xiang-Nan Wang, Yi-Zhao Gao, Xiang-Tao Zhang, Yu-Zhen Yu, He Lv
Summary: This study developed a reasonable and practical constitutive model for rockfill materials, considering the effects of anisotropy and grain crushing. The stress-strain behaviors of high core rockfill dams were simulated using the developed model and validated with laboratory tests and situ monitoring data. A new anisotropic state parameter was proposed and the elastoplastic model was verified for the first time with situ monitoring data. The results demonstrated the reliability and superiority of the developed model compared to the traditional model.
ENGINEERING COMPUTATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
Vahid Galavi
Summary: This paper presents an elasto-plastic constitutive model within a double hardening framework for predicting the mechanical behavior of sands under various stress and relative density conditions. The model's capability is demonstrated by simulating laboratory tests data of Karlsruhe sand for different loading conditions.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Jialin Cheng, Gang Ma, Guike Zhang, Xiaolin Chang, Wei Zhou
Summary: This study presents a theoretical model for analyzing the deterioration effect on the stress and deformation characteristics of rockfill materials during weathering. By introducing a deterioration coefficient, the stress and strain tensors before and after deterioration can be derived from granular matter mechanics and quantitatively evaluated using the Duncan-Chang EB model. The model predictions were verified through triaxial tests and showed good agreement with experimental results. The model can also predict the deteriorated stress and deformation characteristics after cyclic wetting-drying.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Materials Science, Multidisciplinary
Liping Chen, Shihai Bian, Xiaokai Niu, Yongbo Zhao
Summary: The study investigates the dilatancy behavior of coarse-grained materials under different stress paths and provides a dilatancy equation description and verification method based on the Lade-Kim plastic potential. The research finds that the Lade-Kim plastic potential has difficulty in considering the influence of stress paths, but is suitable for specific stress increment ratio loading experiments. These findings contribute to understanding the stress path dependence of dilatancy behavior in rockfill materials.
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Geological
Vicente Mercado, William Fuentes, Felipe Ochoa-Cornejo
Summary: This work presents the implementation of a simplified three-dimensional Hoek-Brown strength criterion using a multiyield-surface plasticity approach. The adopted three-dimensional simplification takes into account the influence of the intermediate principal stress and maintains simplicity in numerical implementation. The introduction of multiple yield surfaces allows for a smooth definition of the material's nonlinear stress-strain behavior, while a kinematic hardening rule enables a hysteretic and path-dependent stress-strain response.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Chemical
Jinwei Wang, Shichun Chi, Xiaoquan Shao, Xiongxiong Zhou
Summary: The study found that particle crushing and particle arrangement of rockfill materials have an impact on mechanical behavior, with larger specimen sizes resulting in lower mean values and standard deviations of mechanical parameters. The sizes of REV for different mechanical parameters vary, with the REV for the E-B constitutive model parameters being 360 x 720 mm.
Article
Engineering, Mechanical
Nobutada Ohno, Hisashi Nakamoto, Yusuke Morimatsu, Dai Okumura
Summary: In this study, an extended evolution equation for cyclic hardening and a set of evolution equations for plastic strain surface were proposed to properly evaluate the cyclic plastic strain range under pre-loading and ratcheting conditions. These extensions were verified through uniaxial cyclic experiments on 316 stainless steel at 600 degrees C and proved to accurately simulate the experiments without the need for a resetting scheme if the strain range does not significantly decrease with cycles. The extended equations were also used to discuss the effect of maximum plastic strain based on previous experiments.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Suketa Chaudhary, P. J. Guruprasad, Anirban Patra
Summary: A microstructure-sensitive crystal plasticity constitutive framework is proposed for simulating the mechanical behavior of single crystal Ni-based superalloys. The model takes into account factors such as crystal orientation, temperature, and microstructural features to accurately predict the tensile, cyclic, and creep response of the materials.
MECHANICS OF MATERIALS
(2022)
Article
Construction & Building Technology
Bin Zeng, Tao Shuai, Ze-Shen Li, Ke-Shi Zhang
Summary: Cyclic tests were performed on BLY160 low-yield-point steel under different strain ranges. Stable hysteresis loops of constant strain amplitude and multistage strain amplitude were obtained. The material exhibited obvious non-Masing characteristics, with the elastic range of the hysteresis loop varying with strain amplitude and history-dependent loading. A constitutive model was proposed to describe the non-Masing behavior, which reduced the tensor model to a one-dimensional model and introduced historical and current strain amplitudes as internal variables.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Computer Science, Interdisciplinary Applications
Yizhao Gao, Yuzhen Yu, Xiangtao Zhang, Xiangnan Wang, Zhenggang Zhan
Summary: A modified anisotropic generalized plasticity model for rockfills is developed and validated in this study, which improves the accuracy and practicality in describing the mechanical properties of rockfill materials.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Mechanics
Kenji Kaneko
Summary: The study experimentally evaluated the behaviors of metals subjected to biaxial mechanical ratcheting and conducted simulation analysis. The reliability of the proposed plastic constitutive model was verified by comparing numerical results with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
Jean-Briac le Graverend
Summary: A phenomenological model is proposed to predict both monotonic and cyclic softening in Inconel 718 superalloy at 650℃. Crystal-plasticity finite-element simulations are performed to validate the model and gain insights on the ratcheting phenomenon.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
J. Zhang, W. Y. Liu, Q. Z. Zhu, J. F. Shao
Summary: In this work, a novel constitutive model is developed to describe the mechanical behavior of rock-like materials under cyclic loading. The model incorporates the fatigue damage related to micro-structural degradation, creep deformation, and plastic deformation. The proposed model accurately captures the mechanical responses of different rocks under both monotonic and cyclic loading conditions.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Review
Materials Science, Multidisciplinary
Guo-zheng Kang, Hang Li
Summary: This work reviews the progress in the cyclic plasticity of Mg alloys by summarizing existing experimental results and reviewing corresponding constitutive models. Conclusions and recommended topics are provided to boost the further development and application of Mg alloys.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)