首页|Linear-Elastic and Elastoplastic Mode II and III Crack Tip Stress-Strain Fields in Cylindrical Specimens with Circumferential Crack
Linear-Elastic and Elastoplastic Mode II and III Crack Tip Stress-Strain Fields in Cylindrical Specimens with Circumferential Crack
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A numerical analysis by means of the ANSYS code was performed in order to identify the ratio of both stress intensity factors and crack tip opening displacements for a cylindrical specimen with circumferential V-notch loaded by remote pure shear stress. This kind of loading produces pure mode II and III loading in four points on the circumferential crack front while the mix-mode II+III exists in all other crack front points. In the linear-elastic range, the ratio of maximum values of mode III and mode II stress intensity factors was found to be K_(max.III)/K_(max),II = 1.37. On the other hand, the ratio of crack tip opening displacements in the elastoplastic range approaches δ _(t max)/δ_(t max) = 2.7. These results can be used for the constructionof fatigue crack growth rate curves in austenitic and ferritic steels measured in the near-threshold and near-fracture regions by means of a special testing device.
mode IImode IIIstress intensity factorcrack tip opening displacement
Jana Hornikova、Pavel Sandera、Jaroslav Pokluda
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Brno University of Technology, Technicka 2, 616 69 Brno, Czech Republic
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