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Modelling the Fracture Behavior of a 350WT Steel

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Technical Report

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Martec Limited Halifax, Nova Scotia Canada

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This report is a summary of work performed to apply fracture tools developed in previous studies to a number of different tests on 350WT steel. This work is a continuation of two previous studies the first involved the development and implementation of a micromechanical failure model, and the second developed a finite element post-processor to compute strain energy release rates and Weibull stresses. The project was divided into a number of phases. The first phase was to determine temperature and strain rate dependent material properties from published sources. Ductile and brittle fracture parameters for the Gurson failure criteria were then determined through FE calibration with existing Charpy V-notch CVN and dynamic tear ductile-to-brittle transitionDBT data. Once the parameters were obtained, the model was applied to DBT analyses of a CVN parametric study involving specimen width, and an explosive loading test.

Subject Categories:

  • Properties of Metals and Alloys
  • Mechanics

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