EFFECT OF DAMAGE ON FATIGUE CRACK-PROPAGATION IN POLYSTYRENE

被引：4
|
作者：
CHUDNOVSKY, A
HUANG, WL
KUNIN, B
机构：
[1] Department of Civil Engineering, Mechanics and Metallurgy, University of Illinois at Chicago, Chicago, Illinois
来源：
POLYMER ENGINEERING AND SCIENCE | 1990年 / 30卷 / 20期
关键词：
D O I：
10.1002/pen.760302007
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this paper we examine a conventional approach to correlate the fatigue crack growth rate with fracture mechanics parameters such as stress intensity factor or elastic energy release rate. To simulate a complex loading history we grow a fatigue crack in a vicinity of a hole in a single edge notched specimen under tension‐tension. It is found that the correlation between the crack speed and stress intensity factor, etc. may exist only for limited experimental conditions. In general, fatigue crack growth is inseparable from the evolution of the damage zone preceding the crack, and damage evolution parameters should enter constitutive equations of fatigue crack growth. The essential role of the damage zone in determining the crack trajectory and speed is demonstrated. Copyright © 1990 Society of Plastics Engineers
引用
收藏
页码：1303 / 1308
页数：6
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