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Finite element investigation of creep crack growth from surface thumbnail cracks

โœ Scribed by S.D. Smith; J.J. Webster; T.H. Hyde

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
869 KB
Volume
34
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

The finite element method is used to predict creep crack growth from an initially semi-elliptical surface crack. Empirical correlations are used in conjunction with calculated fracture parameters and predictions are compared with results from a parallel experimental program. The material investigated is 316 stainless steel at 600ยฐC. The reference stress and stress intensity factor produced poor results. The C* contour integral gave a good prediction for crack growth, when a primary creep constitutive equation was used to model the behaviour. This model was the most appropriate for the nominal stresses and duration of the test.

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