Propagation of physically short cracks in a bainitic high strength bearing steel due to fatigue load

被引：12
作者：
Alfredsson, B. [1 ]
Oberg, M. [1 ]
Lai, J. [2 ]
机构：
[1] Royal Inst Technol KTH, Dept Solid Mech, S-10044 Stockholm, Sweden
[2] SKF Engn & Res Ctr, POB 2350, NL-3430 DT Nieuwegein, Netherlands
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 90卷
关键词：
Fatigue crack experiment; Short crack growth; Crack closure; Life prediction; Potential drop; GROWTH; BEHAVIOR; CLOSURE;
D O I：
10.1016/j.ijfatigue.2016.04.031
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Physically short cracks in a bainitic high strength bearing steel were fatigue loaded. The rapid propagation rate of early open short cracks agreed with that of long closure free cracks. After some rapid growth, the short cracks entered a transition period to the rate of growth limited long cracks. Potential drop showed that the short cracks were open to the tip throughout the growth sequence, which excluded crack face closure in the wake as the growth limiting mechanism in this material. Instead the short crack effect was related to residual stresses and other mechanisms at the crack tip. Crack manufacturing procedures were determined for straight long and short start cracks in the present material. LEFM with effective material parameters and limit compensation predicted the short crack lives. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：166 / 180
页数：15
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