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Effect of Residual Stress on Fracture Parameters of through Cracks in Welded Plates

✍ Scribed by Rahman Seifi

Publisher
Elsevier
Year
2011
Tongue
English
Weight
269 KB
Volume
10
Category
Article
ISSN
1877-7058

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✦ Synopsis

When there is residual stress in a material, stress intensity factor (SIF) in liner elastic fracture mechanics (LEFM) approach and Jintegral in elastic-plastic fracture mechanics (EPFM) approach have not constant values and are path dependent parameters. In this paper, we used the modified relations for them that take into account the effects of the residual stress. These relations have constant values in existing of residual stress and are independent of the path. In this study, we investigated a butt welded plate with through thickness crack perpendicular to the weld path. The SIF and J-integral were numerically calculated for applied and residual stresses. Results have a good agreement with theoretical values obtained by weight function method. Also it was shown that the modified SIF and J-integral can be used as fracture parameters to obtain other properties of fractured plates and structures.

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