Brief review and reconsideration of fatigue crack closure effect in materials

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	Brief review and reconsideration of fatigue crack closure effect in materials
	D. L. Chen; B. Weiss; R. Stickler; Z. G. Wang
	1997
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	13 期号:1 页码:40922
摘要	The state-of-the-art of fatigue crack closure effect, involving the mechanisms, measurements, models, evaluation methods, influencing factors and existing problems is briefly reviewed. Attention is concentrated on a new consideration of closure effect and a re-definition of the effective driving force for the propagation of a fatigue crack. A theoretical basis for measuring the closure effect is established. The proposed closure concept takes into account the role of the tower portion of loading cycle below the opening load. The conventional closure concept is proven to be correct only for some extreme cases which are practically non-existent for engineering materials. A miniature strain gauge technique is developed to measure the crack closure. Stress-ratio-change tests at threshold level clearly indicate the shortcomings of the conventional closure concept, and the validity of the newly-proposed closure concept. The application of the proposed concept can give rise to a new method for the determination of the effective fatigue threshold of materials. If the fatigue threshold is measured at a sufficiently negative stress ratio (R
部门归属	acad sinica,inst met res,state key lab fatigue & fracture mat,shenyang 110015,peoples r china. univ vienna,inst phys chem mat sci,a-1090 vienna,austria.
关键词	Finite-width Stress-ratio Threshold Growth Load Plate
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37939
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. L. Chen,B. Weiss,R. Stickler,et al. Brief review and reconsideration of fatigue crack closure effect in materials[J]. Journal of Materials Science & Technology,1997,13(1):40922.
APA	D. L. Chen,B. Weiss,R. Stickler,&Z. G. Wang.(1997).Brief review and reconsideration of fatigue crack closure effect in materials.Journal of Materials Science & Technology,13(1),40922.
MLA	D. L. Chen,et al."Brief review and reconsideration of fatigue crack closure effect in materials".Journal of Materials Science & Technology 13.1(1997):40922.