Abstract

Betegón and Hancock (1) have described the elastic-plastic behaviour of short and deeply cracked bend bars by reference to modified boundary layer formulations based on the first two terms of the Williams (2) expansion. A local cleavage criterion has been applied to these fields to indicate the effect of the loss of constraint on lower shelf toughness of shallow cracked bend bars. The work models the maximum temperature at which cleavage is possible in these geometries to show the effect of constraint and the a/W ratio of cracked bend bars on the ductile-brittle transition temperature.

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