Weight functions from multiple reference states and crack profile derivatives


Journal Article

Two modifications for implementation of the weight function method are presented. It is proposed to assume the derivative of crack opening displacements instead of the crack profile in the form of a series, as is commonly done, and to compute the unknown coefficients in the series from one or more known stress intensity factors. The new approach eliminates differentiations and reduces the number of integrations as compared with the commonly used method. The new method is tested by exploring the influence of assumed reference load cases and combinations of reference cases on the accuracy of computed stress intensity factors for a variety of applied loads on an edge crack. Use of two known stress intensity factors is shown to give excellent accuracy of computed weight functions and stress intensity factors, well within 1% for most load cases considered. © 1991.

Full Text

Duke Authors

Cited Authors

  • Ojdrovic, RP; Petroski, HJ

Published Date

  • January 1, 1991

Published In

Volume / Issue

  • 39 / 1

Start / End Page

  • 105 - 111

International Standard Serial Number (ISSN)

  • 0013-7944

Digital Object Identifier (DOI)

  • 10.1016/0013-7944(91)90026-W

Citation Source

  • Scopus