Fracture initiation in elastic-plastic bodies
TL;DR: In this article, the applied energy coupled with the nonlinearity index and slope of the initial portion of the load-displacement record can be successfully used for design purposes when holes are present in structural members.
About: This article is published in Engineering Fracture Mechanics.The article was published on 1992-05-01. It has received None citations till now. The article focuses on the topics: Stress concentration & Fracture mechanics.
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01 Jul 1943
TL;DR: In this paper, a simple formula is suggested for describing the stress-strain curve in terms of three parameters; namely, Young's modulus and two secant yield strengths.
Abstract: A simple formula is suggested for describing the stress-strain curve in terms of three parameters; namely, Young's modulus and two secant yield strengths. Dimensionless charts are derived from this formula for determining the stress-strain curve, the tangent modulus, and the reduced modulus of a material for which these three parameters are given. Comparison with the tensile and compressive data on aluminum-alloy, stainless-steel, and carbon-steel sheet in NACA Technical Note No. 840 indicates that the formula is adequate for most of these materials. The formula does not describe the behavior of alclad sheet, which shows a marked change in slope at low stress. It seems probable that more than three parameters will be necessary to represent such stress-strain curves adequately.
2,473 citations
1,330 citations
01 Jan 1972
TL;DR: In this paper, the critical J value fracture criterion refers to crack initiation under plane strain conditions from essentially elastic to fully plastic behavior, and it can be evaluated experimentally with two steel alloys, one of low and the other of intermediate strength.
Abstract: The path independent J integral, as formulated by Rice, can be viewed as a parameter which is an average measure of the crack tip elastic-plastic fied. This together with the fact that J can be evaluated experimentally, makes a critical J value an attractive elastic-plastic fracture criterion. The critical J value fracture criterion refers to crack initiation under plane strain conditions from essentially elastic to fully plastic behavior. Experiments supporting the validity of a critical J value fracture criterion are presented in this paper. Values of the J integral were determined experimentally for two steel alloys, one of low and the other of intermediate strength. A review is given of the analytical support for the critical J value fracture criterion. The range of applicability of the critical J value concept, its limitations, and its advantages are also discussed. /Author/
460 citations
TL;DR: In this article, the area of the true stress/true strain diagram determined under tensile test conditions is equal to the energy absorbed per unit volume at the point of fracture, where the critical specific fracture energy (W c ) characteristic of the material has been absorbed whereby the proportionality law of notched specimens can then be derived.
145 citations
TL;DR: In this paper, the Neuber stress-concentration relation for notches in an elastic-plastic material subjected to shear loading was generalized for a crack in a finite plate subjected to tensile loading.
116 citations