摘要
采用随机临界核理论，结合由剪滞模型得出的应力集中分析结果，对具有层间界面破坏的单向层间混杂叠层复合材料的最终拉伸破坏提出了一种细观统计理论；导出了计及界面剪切强度效应的强度分布函数和破坏准则；得到了最终拉伸强度与界面剪切强度的关系。结果表明，混杂复合材料的最终拉伸强度与界面剪切强度及混杂比存在某种优化匹配关系，而破坏应变则与现有的实验结果较为接近。
This paper proposes a microscopic statistical theory for the ultimate tensile failure of unidirectionally interlaminated hybrid composites with interply interface failure, based on the random critical core theory in conjunction with the results of the stress concentration which are obtained by a shear lag model. A function of the strength distribution and a failure criterion with the effect of interfacial shear strength are derived and a relationship between the ultimate tensile strength and interfacial shear strength is obtained. The results show that the ultimate strength of hybrid composites, interfacial shear strength and hybrid ratio have an optimal match relation, and that the present failure strains are relatively close to the existing experimental value.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1999年第1期99-104,共6页
Acta Materiae Compositae Sinica
基金
广东省自然科学基金
关键词
混杂
复合材料
强度
统计分析
拉伸破坏
hybrid composites, interface damage, strength, random critical core, statistical analysis
