Line-spring model for surface cracks in a reissner plate |
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Authors: | F Delale F Erdogan |
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Affiliation: | Lehigh University, Bethlehem, PA 18015, U.S.A. |
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Abstract: | In this paper the line-spring model developed by Rice and Levy for a surface crack in elastic plates is reconsidered. The problem is formulated by using Reissner's plate bending theory. For the plane strain problem of a strip containing an edge crack and subjected to tension and bending new expressions for stress intensity factors are used which are valid up to a depth-to-thickness ratio of 0.8. The stress intensity factors for a semi-elliptic and a rectangular crack are calculated. Considering the simplicity of the technique and the severity of the underlying assumptions, the results compare rather well with the existing finite element solutions. |
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