Topic
Crack closure
About: Crack closure is a research topic. Over the lifetime, 28157 publications have been published within this topic receiving 588158 citations.
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TL;DR: In this paper, the qualitative features of the growth of a fatigue crack are discussed and a model is proposed which is based on these features and from which quantitative predictions can be made, concluding that cracks may be formed at an early stage in fatigue and that the growth may occupy a large part of the measured fatigue life.
Abstract: Summary The qualitative features of the growth of a fatigue crack are discussed. A model is proposed whichh as these features and from which quantitative predictions can be made. These are in satisfactory agreement with experimental measurements. It is concluded that cracks may be formed at an early stage in fatigue and that the growth of a crack may occupy a large part of the measured fatigue life.
99 citations
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TL;DR: In this paper, it is shown that the use of conventional fracture mechanics concepts to characterize small cracks results in behavior which differs from that of large cracks, due to a breakdown of underlying continuum mechanics assumptions.
Abstract: It is becoming increasingly evident that an understanding of incipient microcracking and growth of small cracks is essential to the development of improved predictions of the fatigue life of structures. Information on the threshold and kinetic properties of small cracks is reviewed and critically discussed. It is shown that the use of conventional fracture mechanics concepts to characterize small cracks results in behavior which differs from that of large cracks—this difference is due to a breakdown of underlying continuum mechanics assumptions. Methods to incorporate small crack behavior in fatigue life predictions are also considered. In these predictions, the importance of separately treating crack initiation and crack growth and of accounting for small crack behavior and plasticity effects (particularly for notched members) is demonstrated.
99 citations
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TL;DR: In this article, new models for the efficient simulation of discrete crack closure, and fracture mechanics based model for crack propagation, both under transient dynamic conditions, were developed and integrated into an interactive graphics program which was used to analyse Koyna dam.
99 citations
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TL;DR: In this paper, a complete solution is given for a fully or partially bridged straight crack in transversely isotropic elastic materials which may correspond to unidirectionally fiber-reinforced ceramics or other brittle composites.
99 citations
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TL;DR: In this paper, the state of stress in a thin elastic plate which contains through-cracks is studied with a view toward assessing the influence of transverse shear on the crack tip stress and deformation fields.
99 citations