Abstract
This paper summarizes results of limit load solutions for plates containing semi-elliptical surface cracks subject to complex loadings, to include biaxial tension and positive cross-thickness bending (crack opening moment). The elastic-plastic J-integral data have been determined from a series of cracked body finite element analyses (FEA) incorporating various plate and crack geometries, loading combinations, and elastic and elastic-plastic material models.The FEA results are used to validate the Lei and Budden limit load solutions, principally via production of R6 Option 3 failure assessment curves (FACs) and comparison with the R6 Option 1 and Option 2 FACs. Comparison with other available limit load solutions in literature has also been carried out. The paper aims to provide some improved guidelines for the safe life assessment margins regarding to structural integrity of aged components in energy industries.
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