Justification of nonlinear J-resistance curves
作者： P Will , B Michel , M Schaper
DOI: 10.1016/0013-7944(90)90040-N
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摘要: Abstract A material-dependent critical value of the energy integral J is widely accepted as a criterion for crack growth initiation, although release rate does not always coincide with J. Crack advance in elastic-plastic materials involves both separation and dissipation by yielding around front. plastic zone formed upon loading additional being dissipated during extension. The objective present paper to evaluate different components whole discuss their effect on stable fracture toughness testing. Limits J-controlled geometry invariance resistance curves are analysed. Data points beyond tip blunting satisfying validity limits should be fitted nonlinear = (A + CΔa) 1 2 .
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