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The characterization of a crack-tip field

โœ Scribed by H.W. Liu; Chen Qi; Sanjiv K. Sinha

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
503 KB
Volume
39
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

The stress intensity factor, K has been successfully used as a measure of fracture toughness, and stress intensity factor range, AK, correlates well with fatigue crack growth rate. This paper gives a deductive logic to demonstrate rigorously that, in the case of small-scale yielding, K and AK are capable of characterizing the elastic-plastic crack-tip field both under a monotonic loading and cyclic fatique loading. This capability to characterize the entire crack-tip field is the underlying reason for the successful application of K and AK to linear fracture mechanics.

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The dislocation field around a mode-II c
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โœ C.R. Chiang ๐Ÿ“‚ Article ๐Ÿ“… 1988 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 437 KB

hvo dimensional distribution of dislocations compatible with slip line theory is used to simulate the plastic flow near the mode II crack tip. On the basis of this model, the critical shear stress 7c is derived from the variational form of the energy principle. In comparison with the critical tensil