Micromechanical modeling of non-linear stress-strain behavior of polycrystalline microcracked materials under tension
Micromechanical modeling of non-linear stress-strain behavior of polycrystalline microcracked materials under tension
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DOI：
10.1016/j.actamat.2018.10.024
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发表时间：
2019-02-01
期刊：
影响因子：
9.4
通讯作者：
Shyam, Amit
中科院分区：
文献类型：
--
作者：
Bruno, Giovanni;Kachanov, Mark;Shyam, Amit
本文讨论了含微裂纹的多晶材料（如陶瓷或岩石）在拉伸、位移控制加载条件下的应力-应变行为。微观力学解释和建模的基本特征，如非线性和滞后的应力-应变曲线，开发，稳定的微裂纹扩展和“粗糙度”的晶间裂纹起着关键作用。实验涉及复杂的加载历史上完成的大和中等晶粒尺寸β-锂霞石陶瓷。该模型再现所观察到的应力-应变曲线的基本特征。(C)2018 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The stress-strain behavior of microcracked polycrystalline materials (such as ceramics or rocks) under conditions of tensile, displacement-controlled, loading is discussed. Micromechanical explanation and modeling of the basic features, such as non-linearity and hysteresis in stress-strain curves, is developed, with stable microcrack propagation and "roughness" of intergranular cracks playing critical roles. Experiments involving complex loading histories were done on large- and medium grain size beta-eucryptite ceramic. The model is shown to reproduce the basic features of the observed stress-strain curves. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.