EFFECT OF RESIDUAL-STRESS ON CRACK-PROPAGATION IN MDPE PIPES

被引：23

作者：

CHAOUI, K ^{[1
]}

CHUDNOVSKY, A ^{[1
]}

MOET, A ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV,DEPT MACROMOLEC SCI,CLEVELAND,OH 44106

来源：

JOURNAL OF MATERIALS SCIENCE | 1987年 / 22卷 / 11期

关键词：

FRACTURE MECHANICS - MATERIALS TESTING - Residual Stresses - PIPE; PLASTIC - Crack Propagation - PLASTICS - Creep;

D O I：

10.1007/BF01133334

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crack propagation behavior in single edge notched specimens prepared from medium-density polyethylene (MDPE) pipe is examined under creep condition. The crack grown from an exterior notch (inbound) initiated faster than that grown from an interior notch (outbound). Subsequently, the outbound crack propagated monotonically to ultimate failure. The inbound crack showed anomalous behavior involving two arrest stages prior to ultimate failure. The pipe is found to possess substantial residual stresses. The energy release rate for each case was calculated taking into account the respective residual stress distribution. The fact that the rates of crack propagation are not a unique function of the energy release rate indicates that the fracture is also influenced by morphological gradients imposed by processing conditions.

引用

页码：3873 / 3879

页数：7

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