改性聚丙烯材料裂纹扩展速度的研究  

Study on Creep Crack Growth in PPM

作　　者：郭翠芳[1] 谢桂兰[2] 张淳源[1] 

机构地区：[1]湘潭大学建筑工程系,湖南湘潭411105 [2]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2003年第4期131-134,共4页Natural Science Journal of Xiangtan University

基　　金：湖南省教育厅资助项目(02C590)

摘　　要：对改性聚丙烯材料的双悬臂梁试样进行了非线性粘弹性的裂纹扩展实验;得到了裂纹扩展全过程的裂纹长度 与时间关系的数据.将弹性回复对应原理应用到了非线性粘弹性裂纹扩展分析中,得到了改性聚丙烯材料裂纹扩展速度 的理论预测公式,比较发现,理论预测结果和实验数据吻合较好.In this paper,some nonlinear viscoelastic crack growth experiments were done and the data of the relationship between crack length and time in the whole fracture process has been determined. By the application of correspondence principle of elastic recovery to nonlinear viscoelastic crack growth analysis, the theoretical prediction formula for crack growth rate in PPM has been decided. A comparison of the theoretical prediction formula with the experimental results is made and it is found that there is a relative good coincidence between them.

关 键 词：弹性回复对应原理 非线性粘弹性 裂纹尖端 裂纹扩展 

分 类 号：O346.1[理学—固体力学]