Investigation of Crack Turning in Fracture in Ship Structures

Investigation of Crack Turning in Fracture in Ship Structures
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Published on 2001 by

Cracks originating at a plate edge, at a hole, and in the centre of a plate were evaluated. The results demonstrated the load & stress conditions under which crack turning was most likely to occur.

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This report investigates the ability to predict crack propagation in a ship structure by finite element analysis based on linear elastic fracture mechanics. The investigation studied whether the stress intensity factor at the crack tip, the number of cycles of constant amplitude loading to reach the critical intensity factor, and the critical length of the crack could be accurately predicted. The investigation concentrated on the ability to predict crack turning during propagation. Cracks originating at a plate edge, at a hole, and in the centre of a plate were evaluated. The results demonstrated the load & stress conditions under which crack turning was most likely to occur.

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