Abstract

A form of diagram for failure estimation is tested on the basis of results of full-scale experiments on the failure of pressure vessels and pipelines with axial through cracks. Use of the two-criterial approach to predict the failure of structural components containing a crack in the brittle, mixed, and ductile regions of failure is substantiated. For example, the brittle failure of cylindrical bodies with through cracks is monitored by criteria of linear fracture mechanics, and ductile failure by the criterion established when the load attains its limiting value (P=Pld).

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