ISSN:
1460-2695
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract— The J-integral is an elastic-plastic fracture mechanics parameter which can be regarded as a measure of the intensity of the crack tip stress and strain fields, irrespective of the plastic zone size. The value of J at the onset of stable crack extension, JIC, has been suggested as a fracture criterion for both large-and small-scale yielding conditions. In this work the value of JIC for an extruded, medium-strength aluminium alloy, 2024-T351 bar, was determined using; (i) the Hutchinson-Rice-Rosengren crack tip model and experimentally-determined crack tip strain profiles; and (ii) the ASTM standard multiple-specimen technique. Knowing the critical load for initial crack extension from the crack tip strain profile method also enabled JIC to be computed using a finite element-hybrid contour method and a modified linear elastic fracture mechanics approach. Agreement between the JIC values obtained by the various methods was good.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1460-2695.1987.tb00499.x
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