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Use of Reissner's Variational Principle in Finite Element Analysis of Crack Problems

Report Number: AFWAL TR 80-4182
Author(s): Jalees Ahmad
Corporate Author: Materials Laboratory
Date of Publication: 1980-12-01
Pages: 24
Contract: Laboratory Research - No Contract
Project: 2307
Task: 2307P1
AD Number: ADA094901

Abstract:
For the purpose of accurately estimating linear elastic fracture parameters by finite element method, the use of Reissner's variational principle as a basis is investigated. Results of two-dimensional analyses performed on three-point bend, compact tension, and ring tension geometries compare well with other solutions available in the literature. Results of three-dimensional analyses of three-point bend and ring geometries are also presented. The method appears to be particularly useful in studying through the thickness variation or Mode I stress intensity factors.

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