Monte Carlo simulation of crack growth on ship hull plating

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Authors
  1. Ando, S.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A Monte Carlo study of the propagation lives of trhough-thickness cracks in ship's deck plate subjected to mode-I deformation and their sensitivity to various parameters was carried out. The simulation model is based on the Paris law, and takes into account those uncertainties that affect demand (stress-intensity factor) and capability (fracture toughness). The effects of load sequence on the crack-growth rate were ignored, and the random loading on the hull girder was approximated by equivalent constant-amplitude loading. The results are presented in plots of the statistical estimate of the propagation life versus the initial crack length. The propagation life was found to be relatively insensitive to the initial crack length when the latter was greater than about 10 cm sensitive to the applied stress range.

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Report Number
DREA-TM-2001-166 — Technical Memorandum
Date of publication
01 Oct 2001
Number of Pages
39
DSTKIM No
CA020261
CANDIS No
516987
Format(s):
Hardcopy;Document Image stored on Optical Disk

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