Initiation and growth of standing contact fatigue cracks

被引：26
|
作者：
Alfredsson, B [1 ]
Olsson, M [1 ]
机构：
[1] Royal Inst Technol, Dept Solid Mech, SE-10044 Stockholm, Sweden
来源：
ENGINEERING FRACTURE MECHANICS | 2000年 / 65卷 / 01期
关键词：
contact fatigue; surface crack; sub-surface crack; mixed mode fatigue; fatigue crack growth; J-integral;
D O I：
10.1016/S0013-7944(99)00108-3
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In the standing contact fatigue test an indenter subjects a case hardened test specimen to a stationary but pulsating contact load. Two crack types appearing in the test specimen are investigated. The ring/cone cracks are surface cracks that circumvent the contact area, whereas the lateral cracks are horizontal sub-surface cracks. The initial crack lengths are determined for both crack types. Actual crack paths from experiments are evaluated numerically. For each crack tip position, stress intensity factors are determined from J(1) and J(2) integrals. The stress intensity ranges are compared to criteria for fatigue crack propagation rate and direction. As the cracks propagate, they orient in the direction with mode II loading close to zero. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：89 / 106
页数：18
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