INTERACTION OF FATIGUE CRACK-GROWTH PROPERTIES AND CRACK SURFACE GEOMETRY IN AL-2024

被引：3
|
作者：
ZUIDEMA, J
MANNESSE, M
机构：
[1] Delft University of Technology, Laboratory of Materials Science, 2628 AL Delft
来源：
ENGINEERING FRACTURE MECHANICS | 1991年 / 40卷 / 01期
关键词：
D O I：
10.1016/0013-7944(91)90131-J
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Fatigue tests with constant DELTA-K and R were performed on specimens of 2024-T351 Al alloy. Fatigue crack growth starts in the tensile mode, but shear lips soon develop if DELTA-K is high enough. Three properties of these shear lips are described: the transverse crack front length, the angle of rotation between the shear lip and the tensile part of the crack, and the shear lip width. These properties will be correlated with the effective DELTA-K, using Schijve's crack closure formula, and with the measured crack growth rates. It is shown that extra closure due to shear lips lags behind the shear lip development. It builds up a few millimetres behind the crack tip.
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页码：105 / 117
页数：13
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