Crack Propagation under Compressive Stress Influenced by Crack Face Asperity-Reference-Cited by-同舟云学术

Crack Propagation under Compressive Stress Influenced by Crack Face Asperity

Published:2006-11 Issue: Volume:324-325 Page:125-128
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Saimoto Akihide¹,Toyoda A.¹,Imai Y.¹

Affiliation:

1. Nagasaki University

Abstract

The influence of surface roughness in crack face on the behavior of crack growth is studied. Numerical results derived from two kinds of mechanical models representing the macroscopic and microscopic asperity supposed to exist in the face of an initial crack are compared. In macro-asperity model, the influence of location and size of single-triangular asperity on the stress intensity factor is evaluated. In this model, it is found that the mode-I stress singularity appears in certain circumstances even under overall compression. In micro-asperity model, influence of friction coefficient on the trajectory of crack path is discussed. There exists a tendency that a path of wing crack growth becomes more straight and parallel to axis of compression as the friction coefficient increases.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.324-325.125.pdf

Reference5 articles.

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3. Horii,H. and Nemat-Nasser,S., J. Geophys. Res., 90-B4 , p.3105, (1985).

4. Nisitani, H., Journal of JSME, Vol. 70, No. 580, p.627, 1967. (in Japanese).

5. Saimoto, A., Imai, Y. and Nisitani, H., Proc. of the 3rd European Conf. on Structural Control, eds. R Flesch, H Irschik and M Krommer, S1-83 - S1-86, 2004. initial flaw tip µ=0. 0 µ=0. 25 µ=0. 50 µ=0. 75 µ=0. 99 µ=0. 0 macro-asperity c c Figure 6: Influence of friction coefficient µ on the crack path.