Effects of residual stress on fracture toughness and subcritical growth of indented cracks in glasses

被引：0
|
作者：
Yoda, M
Ogawa, N
Ikeda, N
Kubota, A
机构：
来源：
ECF 11 - MECHANISMS AND MECHANICS OF DAMAGE AND FAILURE, VOLS I-III | 1996年
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中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fracture and subcritical crack growth were investigated using indented cracks in soda-lime glass, aluminosilicate glass and; borosilicate glass. The effect of residual stress was experimentally determined by obtaining the fracture toughnesses for cracks of various lengths. Extended cracks of various lengths-were produced at the same indentation load. From the results, dimensionless indenter-material constants chi(r) were determined for the surface crack and depth crack of semi-elliptical shape. Subcritical crack growth data for the as-indented short cracks show anomalous behavior, i.e. negative dependence of crack velocity on the stress intensity factor during small crack growth. This decrease in the crack velocity for the as-indented short crack can be explained by taking account of the residual stress.
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页码：727 / 732
页数：6
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