Damage and plasticity at the interfaces in composite materials and structures
Damage and plasticity at the interfaces in composite materials and structures
复制标题
复合材料和结构界面的损伤和塑性
DOI：
10.1016/j.cma.2009.08.024
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发表时间：
2009
影响因子：
7.2
通讯作者：
P. Rizzo
中科院分区：
文献类型：
--
作者：
A. Spada;G. Giambanco;P. Rizzo
采用一种新的弹塑性损伤解析模型，研究了韧性、脆性和准脆性材料界面处的结构行为。该模型是在一个物理一致性理论的框架内开发的。Helmholtz自由能被写入以预测材料的硬化或软化。考虑了各向同性损伤，并考虑了包括非关联流动规则在内的非线性效应。界面的法律都提出了一个速率和离散增量形式。然后将分析公式实施到有限元代码中，并对两个结构构件进行了研究以验证模型。数值计算结果与文献中的实验数据进行了比较。结果表明，新模型具有较好的通用性，并将连续损伤力学和弹塑性力学作为极限情况。
The structural behavior at the interface between two surfaces of ductile, brittle or quasi-brittle materials is studied by a new analytical elastoplastic damaging model. The model is developed in the framework of a thermodynamically consistent theory. The Helmholtz free energy is written to predict the materials’ hardening or softening. An isotropic damage is considered and the possible effects of dilatancy are taken into account including non-associative flow rules. The interface laws are presented both in a rate and a discrete incremental form. The analytical formulation is then implemented into a finite element code and two structural members are studied to validate the model. The numerical results are compared to experimental data available in literature. It is demonstrated that the new model is general and it includes the continuum damage mechanics and the elastoplasticity as limit cases.