International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Temperature Effects on Fracture Toughness Parameters for Pipeline Steels

  • Chanda, Sourayon (Department of Mechanical Engineering, University of Alberta) ;
  • Ru, C.Q. (Department of Mechanical Engineering, University of Alberta)
  • Received : 2018.03.04
  • Accepted : 2018.05.04
  • Published : 2018.12.31
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Abstract

The present article showcases a temperature dependent cohesive zone model (CZM)-based fi nite element simulation of drop weight tear test (DWTT), to analyse fracture behavior of pipeline steel (PS) at different temperatures. By co-relating the key CZM parameters with known mechanical properties of PS at varying temperature, a temperature dependent CZM for PS is proposed. A modified form of Johnson and Cook model has been used for the true stress-strain behavior of PS. The numerical model, using Abaqus/CAE 6.13, has been validated by comparing the predicted results with load-displacement curves obtained from test data. During steady-state crack propagation, toughness parameters (such as CTOA and CTOD) were found to remain fairly constant at a given temperature. These toughness parameters, however, show an exponential increase with increase in temperature. The present paper offers a plausible approach to numerically analyze fracture behavior of PS at varying temperature using a temperature dependent CZM.

Keywords

Acknowledgement

Supported by : NSERC (Natural Science and Engineering Research Council) of Canada

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