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The influence of crack tip shielding on fatigue crack propagation

Cernescu, Anghel 2017. The influence of crack tip shielding on fatigue crack propagation. Frattura ed Integrità Strutturale 11 (41) , pp. 307-313. 10.3221/IGF-ESIS.41.41

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The fatigue crack propagation is one of the major problems and of the real concern in the evaluation of the structural integrity of components. This is due to the fact that once a fatigue crack has been detected it is also known its effect on the component; respectively it will cause failure at one time. In this situation, the problem is focused on determining the character of propagation of the crack so that it can be estimated and respectively delayed as possible the failure moment. The fatigue crack propagation character is determined by the stress state at the crack tip and the behavior of the material in which the crack is propagates. One of the phenomena with great influence on the fatigue crack propagation character is the crack tip stress shielding phenomena. In this paper the overloading effect is explained in terms of crack tip shielding mechanisms that guide the fatigue crack growth in plastic zone. The results indicate a change of fatigue crack propagation character once its tip enters into a plastic zone.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
ISSN: 1971-8993
Date of First Compliant Deposit: 14 May 2019
Date of Acceptance: 3 May 2017
Last Modified: 17 Mar 2021 03:02

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