Investigation of crack turning in fracture in ship structures

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Authors
  1. Smith, D.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Smith (D R), Halifax NS (CAN)
Abstract
The ability to predict crack propagation in a ship structure by finite element analysis based on linear elastic fracture mechanics was investigated. The investigation showed that 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 sof 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 showed that crack turning was most likely to occur under mixed mode loading combining shear and tension.

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Keywords
Crack tip;Crack turning;Stress intensity factor
Report Number
DREA-CR-2001-067 — Contractor Report
Date of publication
01 Jul 2001
Number of Pages
51
DSTKIM No
CA020011
CANDIS No
516676
Format(s):
Hardcopy;Document Image stored on Optical Disk

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