ANALYTICAL OPTIMIZATION OF CRACK SIZE MEASUREMENT NUMBER IN R-CURVE STUDY

被引：9
|
作者：
KUMAR, AN
机构：
[1] Univ of Sydney, Sydney, Aust, Univ of Sydney, Sydney, Aust
来源：
ENGINEERING FRACTURE MECHANICS | 1988年 / 29卷 / 05期
关键词：
MEASUREMENT ERRORS - MECHANICAL VARIABLES MEASUREMENT - Optimization;
D O I：
10.1016/0013-7944(88)90183-X
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Differences among various standards with regard to slow crack growth measurement in multispecimen R-curve studies are outlined. An estimation of error in CTOD toughness due to inaccuracy in crack size measurement is given. An analytical approach has been used to optimize the number of measurement for typical curved crack fronts. In the case of relatively smooth crack front, nine point measurements as recommended by ASTM standard are found to be adequate. However, more measurements are necessary when the materials inhomogeneity and tunneling effects contribute to irregular crack fronts. This has been evidenced both from direct measurement and analytical approach.
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页码：599 / 608
页数：10
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