Mode I fatigue crack growth at notches considering crack closure

被引：24
|
作者：
Savaidis, G. [1 ]
Savaidis, A. [2 ]
Zerres, P. [3 ]
Vormwald, M. [3 ]
机构：
[1] Aristotle Univ Thessaloniki, Dept Mech Engn, Thessaloniki 54124, Greece
[2] Sch Pedag & Technol Educ, Dept Mech Engn Educators, Athens 14121, Greece
[3] Tech Univ Darmstadt, Dept Civil Engn, D-64287 Darmstadt, Germany
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2010年 / 32卷 / 10期
关键词：
Fracture mechanics; Crack growth; Crack closure; Notches; Fatigue life prediction;
D O I：
10.1016/j.ijfatigue.2010.02.010
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
An analytical elastic-plastic model is presented describing the fatigue life of arbitrary engineering components with elliptical notches under constant amplitude loading. A Delta J(eff)-based crack growth law is integrated from a starting crack size of micro-structural dimension up to the total fracture of the component. Plasticity-induced crack opening and closure effects are explicitly taken into account. Calculated opening load levels for cracks growing in notch affected areas have been found to be in good agreement with corresponding experimental values determined from notched specimens made of two different metallic materials. Comparison of experimentally determined and calculated crack growth curves for specimens with central notches confirm the satisfactory accuracy of model. The experimental verification of the model's calculation accuracy covers various ductile materials, notch geometries, load amplitudes and mean load effects. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1543 / 1558
页数：16
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