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The Effect Of Plastic Deformation On The Strain Energy Release Rate In A Centrally Notched Plate Subjected To Uniaxial Tension

Report Number: AFFDL TR 65-186
Author(s): Forman, Royce G.
Corporate Author: Air Force Flight Dynamics Laboratory
Laboratory: AF Flight Dynamics Laboratory
Date of Publication: 1966-01
Pages: 36
Contract: Laboratory Research - No Contract
Project: 1467
Task: 146704
AD Number: AD0632454

Abstract:
By using the Dugdale model for a crack in a plate, an improved formula was derived for the strain energy release rate, G. The formula has the same form as the solution for a linear elastic plate, except a correction factor is used which corrects for both the effect of yielding and the finite width of the plate. Curves are presented giving the values of the correction factor, and they indicate that the nominal stress to yield stress ratio has a pronounced effect on the strain energy release rate.

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