Strain Energy Release Rate for a Crack under Complex Loading.

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Abstract:

This paper gives an expression for the energy release rate in an arbitrary direction for a crack subjected simultaneously to Mode I, Mode II and Mode III conditions. The energy release rate is computed using the elastic solution of a deflected crack, having a main branch and a propagation branch. The elastic solution for the anti-plane problem is easily obtained by use of complex variables. For the in-plane problem we use the limiting solution recently obtained. Using the critical energy release rate criterion, incipient paths of propagation as well as the fracture stresses of such a crack, were obtained from the maximum value of the energy release rate. Results are in close agreement with a few experimental results available in the literature. The energy release rate, in parametric form, can be used for any crack subjected to Modes I, II and III loading conditions. Author

Author(s):
Hussain, M. A. ; Pu, S. L.
Author Organization(s):
WATERVLIET ARSENAL N Y
Descriptive Note:
Technical rept.,
Pagination:
0029

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
WVT-TR-75042
Project Number(s):
PRON-EJ-5-Y0015-02-EJ-M7
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
*MATHEMATICAL MODELS, *CRACKING(FRACTURING), *CRACKS, *ENERGY, *FRACTURE(MECHANICS), STRESSES, EXPERIMENTAL DATA, LOADS(FORCES), ELASTIC PROPERTIES, RATES, STRAIN(MECHANICS), CRACK PROPAGATION, MATHEMATICAL PREDICTION, RELEASE, EQUATIONS, FORMULAS(MATHEMATICS), COMPLEX VARIABLES
Field(s)/Group(s):
Metallurgy and Metallography, Mechanics
Keyword(s):
Strain energy
Report Date:
1975 Jul 01