摘要
本文对典型铺设的［０２／±４５２／９０２］ｓ碳／环氧复合材料层板中的典型损伤状态进行了实验观察，测定出损伤对层板刚度引起的下降率。建立了横向裂纹扩展、分层伴以横向裂纹扩展的三维有限元分析模型，计算出对层板刚度引起的下降率，并与实验值进行了比较。结果表明，横向裂纹和分层是层板的主要损伤型式，分层损伤扩展是一个主导性的稳定的损伤扩展过程，是导致刚度下降的主要因素。
Typical damage states in unnotched[02/±452/902]s composite laminate were studied by experimental observation,and the stiffness reduction rate caused by damages was measured in the laminate.Two 3-D mechanical models in which transverse crack and delamination with transverse crack developing are put forward,and the stiffness reduction of the laminate is calculated by the models and is in agreement with the experiment.The results show that the transverse crack and delamination are the major damage modes of the laminate,and the damage development of delamination is a main and stable process,and markedly leads to the decrease in stiffness of the laminate.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1996年第2期124-130,共7页
Acta Materiae Compositae Sinica
关键词
复合材料
刚度
分层
横向裂纹
composite laminate,stiffness,delamination,transverse crack
