Abstract
The objective of the present paper is to study the fatigue propagation behaviour of two parallel edge-cracks in a finite width sheet. By using the stress intensity factor relation proposed by the authors, experimental data are analysed and the influence of geometry of edge-cracked sheet on crack growth rate is discussed. The applicability of the maximum dilatational strain energy density criterion, T- criterion , as proposed by Theocaris and Andrianopoulos, is investigated for use in a crack propagation angle study.
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