Virtual Crack Extension Method for Energy Release Rate Calculations in Flawed Thin Shell Structures

[+] Author and Article Information
P. LeFort

Turbine Technology Laboratory, General Electric Company, Schenectady, N.Y. 12345

H. G. deLorenzi, V. Kumar, M. D. German

Corporate Research and Development, General Electric Company, Schenectady, N.Y. 12301

J. Pressure Vessel Technol 109(1), 101-107 (Feb 01, 1987) (7 pages) doi:10.1115/1.3264840 History: Received December 19, 1983; Revised June 03, 1986; Online November 05, 2009


The calculation of the energy release rate, G , by the virtual crack extension method has been used extensively in the literature over the last few years. A formulation and implementation of the energy release rate for use with 8 and 9-noded isoparametric thin shell elements is described in this paper. The representation used in the paper allows the calculation of G either as an integral part of a finite element analysis or separately in a postprocessing program using the stress and strain data from a finite element analysis as input. The results presented in the paper are compared with those published in the literature for several elastic as well as elastic-plastic crack problems.

Copyright © 1987 by ASME
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