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J - Integral and Fracture Time under Thermal Shock Loading
Technical Paper
912532
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English
Abstract
A new path independent J-integral is derived to study the behaviour of the crack under the thermal shock and is calculated by the finite element method. For the validity of J-integral numerical analysis and experiments are undertaken. Summary of the research results is following:
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1.
J integral is expressed in the form of line integral by using the convolution integral.
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2.
Under Mode I thermal shock loading, the effect of inertia term on the J-integral value is not negligible for a glass plate but for steel plate.
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3.
Good agreement of fracture times predicted with the present J integral and measured with thermocouple is obtained for glass plate under Mode I thermal shock.
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Citation
Lee, K. and Park, J., "J - Integral and Fracture Time under Thermal Shock Loading," SAE Technical Paper 912532, 1991.Also In
References
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- Freund, L.B. “Energy flux into the tip of an existing crack in an elastic solid,” J. Elast. 2 341 349 1968
- Gurtin, M.E. “On a path - independent integral for elastodynamics,” Int.J.Fracture 12 643 644 1976
- Hsu, T.R. et al “On thermofracture behavior of leaking thin - wall pipes,” Int.J.Pres.Ves. Piping 24 269 281 1986