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Fracture Mechanics Analysis of an Attachment Lug
Interim technical rept. May-Oct 1974
MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB
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This report documents a finite-element analysis procedure for computation of Mode 1 and Mode 2 stress intensity factors associated with a sharp crack in an attachment lug detail. The procedure is a complete FORTRAN-4 program which generates and parametrically analyzes the lug, based on designer- oriented input data. The formulation of a special crack-containing element is reviewed and its performance is summarized. A detailed description of the lug analysis procedure covers the physical problem, modeling, program flow and options, inputoutput conventions, execution times and limitations which must be observed. Results from example analyses of some attachment lugs are presented.
APPROVED FOR PUBLIC RELEASE