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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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Journal ArticleDOI
TL;DR: In this article, a characterization protocol based on the electron backscatter diffraction technique has been developed to identify the combination of microstructural features within crack initiation sites and surrounding neighborhoods that leads to the transition from initiation to early small crack growth.

150 citations

Journal ArticleDOI
TL;DR: In this paper, the authors show that finite element analyses using standard fatiguedamage formulations exhibit an extreme sensitivity to the spatialdiscretisation of the problem, which is caused by the fact that the underlying continuum model predicts instantaneous, perfectly brittle crack growth as soon as a crack has been initiated.
Abstract: Continuum damage mechanics can be used to model the initiation and growthof fatigue cracks. However, finite element analyses using standard fatiguedamage formulations exhibit an extreme sensitivity to the spatialdiscretisation of the problem. The mesh sensitivity is caused by the factthat the underlying continuum model predicts instantaneous, perfectlybrittle crack growth as soon as a crack has been initiated. The growth ofdamage localises in a vanishing volume during this instantaneous growth.This localisation is not so much due to loss of ellipticity of theproblem, but is caused by the fact that the damage rate is singular at thecrack tip. The damage rate singularity can be removed by the introductionof higher-order deformation gradients in the constitutive modelling. As aresult, crack growth at a finite rate and with ! a positive amount of energydissipation is predicted. Finite element analyses converge to thissolution and are thus no longer pathologically dependent on the spatialdiscretisation.

149 citations

Journal ArticleDOI
TL;DR: In this paper, strong discontinuities embedded in finite elements are used to model discrete cracking in quasi-brittle materials and a numerical algorithm is introduced to enforce the continuity of the crack path.

149 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental and numerical study has been made of the mechanisms of fatigue crack growth and crack-closure behavior in an αβ titanium alloy Ti-4A1-4Mo-2Sn-0.5Si (IMI 550), following both single and block tensile overloads.

149 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023219
2022536
2021143
2020154
2019172
2018244