一种预测复合材料棘轮行为的循环塑性-损伤模型  

A cyclic plasticity-damage model for predicting ratcheting behavior of composite materials

作　　者：成磊 肖毅[1] 王杰 薛元德[1] CHENG Lei;XIAO Yi;WANG Jie;XUE Yuande(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China;ABB Power Grids Investment(China)Limited,Beijing 100000,China)

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]ABB电网投资(中国)有限公司,北京100000

出　　处：《复合材料学报》2021年第10期3338-3350,共13页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52078362)。

摘　　要：构建循环塑性本构模型并揭示其微观机制,目前仍然是复合材料力学研究富有挑战性的课题。本文提出了一种循环塑性-损伤模型,用以预测在循环载荷作用下纤维增强复合材料的应力-应变响应。该模型是在作者前期提出的描述非线性滞后行为的弹塑性本构模型的基础上的进一步扩展。它可以预测加载时的非线性响应、卸载和重加载时的迟滞行为及大量循环下的棘轮现象。作为基准问题验证,将Kawai等的实验数据与本文模型的数值预测进行了比较。结果表明,该模型能够模拟碳纤维/环氧树脂单向复合材料在偏轴循环加载下的棘轮行为。It is still a challenging problem to establish a constitutive model for cyclic plasticity and reveal its microscopic mechanism. A cyclic plasticity-damage model was proposed in this study to predict the stress-strain response of fiber reinforced polymer under cyclic loading. This model is a further extension of the elastic-plastic constitutive model to describe the nonlinear hysteresis behavior proposed by the authors. It can predict the nonlinear responses during loading, hysteresis behavior during unloading and reloading and the ratcheting phenomena under a large number of cycles. As a benchmark problem verification, the experimental data by Kawai et al, were compared with the numerical prediction of the model in this paper. The results show that the model can simulate the ratcheting behavior of carbon fiber/epoxy unidirectional composite under off-axis cyclic loading.

关 键 词：纤维增强聚合物复合材料 循环塑性 迟滞行为 棘轮效应 疲劳损伤 

分 类 号：TB330.1[一般工业技术—材料科学与工程]