纤维增强树脂基复合材料的疲劳剩余刚度研究进展

A SURVEY ON STIFFNESS REDUCTION MODELS OF FIBER REINFORCED PLASTICS UNDER CYCLIC LOADING

回顾了过去二十年来公开发表的复合材料刚度退化的主要模型，对这些模型做了分类和讨论．按照模型的理论基础及研究方法将它们分为了理论模型、半经验模型和经验模型二类．理论模型是指那些完全依赖于力学分析而得到的模型，这类模型建立了材料的微观损伤机理与宏观刚度退化之间的关系．经验模型通常不需要过多的力学分析，仅对大量实验数据进行经验性拟合，一般具有简单易用的形式．半经验模型是理论与经验模型的结合──在力学分析基础上的经验处理．

Stiffness reduction models of fiber reinforced polymer composite laminates published in recent two decades were reviewed in the present paper. According to their methodologies, these models were classified as theoretical models, semi-empirical models and empirical models. The theoretical models are those entirely based on the mechanical analysis and include mainly shear- lag models, fracture models, elasticity mechanics models and etc. Theoretical models establish the relationships between micro damage mechanism and macro stiffness reduction of the laminates. The empirical models were established based on experimental data, so an empirical model is often simple and easy to understand and to apply. The semi-empirical models are those between the theoretical and the empirical ones.