Thermal fatigue crack propagation in massive cylinders during their cyclic heating

Processes that reduce the level of maximum unsteady stresses during thermal fatigue crack propagation in massive bodies during their convective cyclic heating are considered. It is shown that during crack propagation, the stress intensity factor K sub 1 increases initially to a certain limit K sub 1...

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Bibliographic Details
Published inStrength of materials Vol. 31; no. 4; pp. 380 - 388
Main Authors Tret'yachenko, G N, Barylo, V G, Solov'eva, N G
Format Journal Article
LanguageEnglish
Published 01.01.2000
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Summary:Processes that reduce the level of maximum unsteady stresses during thermal fatigue crack propagation in massive bodies during their convective cyclic heating are considered. It is shown that during crack propagation, the stress intensity factor K sub 1 increases initially to a certain limit K sub 1max and then decreases. The factor K sub 1max depends on the initial and boundary conditions of heat exchange and on the rates of decrease in the maximum stressesd during thermal fatigue crack propagation. It is shown that the asymmetry of boundary and initial conditions of heat exchange can contribute to either acceleration or retardation of crack propagation depending on the material properties and heating conditions. Materials discussed include 1Kh18N10T steel.
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ISSN:0039-2316