Steel Grade Selection for Hull Structural Applications using the Master Curve Approach

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Authors
  1. Bayley, C.
  2. Aucoin, N.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
The resistance to the brittle fracture of ship hull structures typically follows a letter grade designation associated with a minimum Charpy V Notch (CVN) absorbed energy requirement at a specified test temperature. While the selection of the steel letter grade is often prescribed by Ship Classification Societies depending on minimum operating temperature and plate thickness, it is impossible to estimate the safe operating limits of hull structure using the letter grade designation alone. The Master Curve approach together with CVN to reference temperature correlations which account for stress-intensity rates, provides a means to quantitatively predict the risk associated with different steel grades [1]. The ability of these expressions to predict the fracture response of hull structural steels under different environmental and loading rates is examined. These predictions draw upon a series of experimental data sets ranging from explosively loaded tests [2], dynamic fracture toughness, quasi-static fracture toughness and Charpy V notch configurations. Conclusions drawn from the analysis are related to the probability of ship survivability for the different loading scenarios.
Keywords
Master Curve;Stress Intensity Rate;Fracture Resistance;Steel Grade Selection
Report Number
DRDC-RDDC-2014-N39 — External Literature
Date of publication
01 Jan 2015
Number of Pages
1
DSTKIM No
CA040681
CANDIS No
801897
Format(s):
Electronic Document(PDF)

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