纤维增强复合材料本构模型研究进展

本文对纤维增强复合材料的本构模型最新研究成果进行简要阐述和归纳,并结合实例进行了相关数值模拟计算。文中阐述的复合材料为纤维增强树脂复合材料、纤维增强金属基复合材料和纤维编织复合材料。目前,关于纤维增强金属基复合材料的研究较少,大多数研究集中在纤维增强树脂复合材料和纤维编织复合材料。许多学者在经典弹性本构模型和连续介质力学基础上,推导出了一些弹塑性、粘弹性和考虑损伤的非线性本构模型。通过实例计算结果表明,考虑损伤导致刚度退化的复合材料弹塑性本构模型计算得到的拉伸应力应变曲线与测试结果基本一致。本文通过对复合材料本构模型的最新研究成果的归纳和数值模拟实例计算,为后续研究工作提供借鉴,推动其在实际工程中的应用。

Research Progress on Constitutive Models for Fiber Reinforced Composites

The recent progress of research regarding the constitutive models for fiber reinforced composites are briefly summarised and classified in this paper. Numerical simulation of a real case was performed taking into account of an appropriate constitutive model. The composite materials described in this paper include fiber reinforced resin composites, fiber reinforced metal matrix composites and fiber woven composites. At present, the study on fiber reinforced metal matrix composites is limited, whereas more research effort is focused on fiber reinforced resin composites and fiber woven composites. The various elastic-plastic, visco-elastic and damage-related nonlinear constitutive models were mostly derived on the basis of classic elastic constitutive models and continuum mechanics by many researchers. Through the results of a real case calculation, it is shown that the stress-strain curve calculated by the composite elasitic-plasitic constitutive model considering the stiffness degradation caused by damage is almost identical with the experimental result. It is therefore the intension of this paper to provide a useful reference and guidance for further research in this area through a systematic review of the latest development in constitutive models for composite materials and to promote their usage in practical engineering applications.