Abstract
AbstractA calculation procedure for plates with semi‐elliptical surface cracks under tension and bending with aspect ratios of a/c ≤ 0.2 and arbitrary relative crack depths a/t is presented. For the computation an improved line spring model is used. K1‐values are calculated along the crack contour.For the deepest point of a surface crack the K1‐values are terminated by two well known threshold curves: The upper bound curve is identical with the solution for the edge crack (a/c = 0). The lower bound is described by the results after Newman and Raju for a/c = 0.2. The present K1‐values are in good agreement with both curves.For high a/t‐ratios the maximum K1‐value is found between the deepest and the surface edge point (Q′ and Q″) of the crack. This result could explain among others that crack growth does not conserve the semi‐elliptical shape sometimes.
Published Version
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