## Abstract

Using a finite element method, in conjunction with an equivalent domain integral approach, the elastic-plastic crack-tip J-integral is computed for semielliptical surface flaws in a plate under a remote tensile load. The computed elastic-plastic values of the J-integral are compared to the elastic ones. It is concluded that a linear elastic fracture mechanics approach can be used for semielliptical cracks of relative depth of a/t = 0.25 and aspect ratio of c/a ≦ 3, up to load levels of 0.9δ_{y} with an error of no more than 10% in the (equivalent) elastic-plastic stress intensity factor. A simple empirical equation for evaluating the elastic-plastic J-integral for surface flaws is proposed.

Original language | English |
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Pages (from-to) | 81-87 |

Number of pages | 7 |

Journal | Engineering Fracture Mechanics |

Volume | 29 |

Issue number | 1 |

DOIs | |

State | Published - 1988 |