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RESEARCH PAPERS

The Enriched Element for Finite Element Analysis of Three-Dimensional Elastic Crack Problems

[+] Author and Article Information
P. D. Hilton

Materials Technology, Arthur D. Little, Inc., Cambridge, Mass. 02140

B. V. Kiefer

Research Department, Bethlehem Steel Corp., Homer Research Laboratories, Bethlehem, Pa. 18016

J. Pressure Vessel Technol 102(4), 347-352 (Nov 01, 1980) (6 pages) doi:10.1115/1.3263344 History: Received November 22, 1978; Revised March 05, 1980; Online November 05, 2009

Abstract

An improved procedure for enriching three-dimensional isoparametric elements with the asymptotic crack front solution is described. Results from finite element calculations, involving these enriched elements, for the three-dimensional problems of a straight crack in plane strain and an axisymmetric penny-shaped crack which demonstrate the high degree of accuracy attainable are presented. Some finite-element solutions for through-crack and surface flaw problems are then reported showing the influence of a free surface on the variation of the stress intensity along the crack edge. Special treatments of the crack front-free surface stress intensity are implemented and the results discussed.

Copyright © 1980 by ASME
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