Constitutive model and failure criterion for orthotropic ceramic matrix composites under macroscopic plane stress
Constitutive model and failure criterion for orthotropic ceramic matrix composites under macroscopic plane stress
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宏观平面应力下正交各向异性陶瓷基复合材料本构模型及失效准则
DOI：
10.1111/jace.17487
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发表时间：
2021-02
影响因子：
3.9
通讯作者：
Jiao Guiqiong
中科院分区：
文献类型：
--
作者：
Yang Chengpeng;Jia Fei;Wang Bo;Huang Tao;Jiao Guiqiong
为了预测正交各向异性陶瓷基复合材料（CMCs）在宏观平面应力下的非线性应力应变行为和断裂强度，在连续损伤力学（CDM）框架下建立了一个简明的基于损伤的力学理论，包括一个新的本构模型和两种失效准则.采用应变分割和损伤解耦方法建立了损伤本构模型。同时，为了将CMC的破坏特性与损伤驱动力联系起来，提出了基于损伤能量释放率（DERR）的CMC破坏准则，并提出了最大DERR准则和交互DERR准则。为了进行模型评估，将该理论应用于具有可损伤和非线性行为的典型CMC，即2D-C/SiC。研究了轴上和轴外沿着递增循环拉伸下的损伤演化规律、应变响应和断裂强度。理论预测与实验数据的比较表明，新发展的力学理论能够给出正交各向异性CMC的应力应变响应和破坏特性的合理和准确的结果。
To predict the nonlinear stress‐strain behavior and the rupture strength of orthotropic ceramic matrix composites (CMCs) under macroscopic plane stress, a concise damage‐based mechanical theory including a new constitutive model and two kinds of failure criteria was developed in the framework of continuum damage mechanics (CDM). The damage constitutive model was established using strain partitioning and damage decoupling methods. Meanwhile, the failure criteria were formulated in terms of damage energy release rate (DERR) in order to correlate the failure property of CMCs with damage driving forces, and the maximum DERR criterion and the interactive DERR criterion were suggested simultaneously. For the sake of model evaluation, the theory was applied to a typical CMC with damageable and nonlinear behavior, that is, 2D‐C/SiC. The damage evolution law, strain response and rupture strength under incremental cyclic tension along both on‐axis and off‐axis directions were completely investigated. Comparison between theoretical predictions and experimental data illustrates that the newly developed mechanical theory is potential to give reasonable and accurate results of both stress‐strain response and failure property for orthotropic CMCs.
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影响因子：
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作者：
Yang Qiang;Xu Chenghai;Xie Weihua;Meng Songhe;Jin Hua
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