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Transition of ductile and brittle fracture during DWTT by FEM

Conference Paper


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Abstract


  • Globally, steel pipelines are widely used to transport energy in the form of liquid petroleum and natural gas. The steel used in the manufacture of these pipelines must have high strength and toughness, and high resistance to fracture. The Drop Weight Tear Test (DWTT) is the most widely used test to assess brittle fracture characteristics in steel. The zones of ductile and brittle fracture during DWTT characterize the quality of pipeline steels. In this paper, the Gurson-Tvergaard-Needleman (GTN) fracture models are coupled in a Finite Element model. The ductile and brittle fracture zones in the samples are analyzed under different conditions. The results show that the change in fracture mode during the DWTT is from the brittle to the ductile, then again to the brittle. The calculated absorbed energies during DWTT compare well with experimental findings. Finally, we present an analysis of the transition from ductile to brittle fracture under different conditions.

Publication Date


  • 2013

Citation


  • Wu, Y., Yu, H., Lu, C., Tieu, A. K., Godbole, A. R. & Michal, G. (2013). Transition of ductile and brittle fracture during DWTT by FEM. 13th International Conference on Fracture (ICF) (pp. 1648-1655). China: Curran Associates, Inc.

Scopus Eid


  • 2-s2.0-84898770738

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3359&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2350

Has Global Citation Frequency


Start Page


  • 1648

End Page


  • 1655

Place Of Publication


  • China

Abstract


  • Globally, steel pipelines are widely used to transport energy in the form of liquid petroleum and natural gas. The steel used in the manufacture of these pipelines must have high strength and toughness, and high resistance to fracture. The Drop Weight Tear Test (DWTT) is the most widely used test to assess brittle fracture characteristics in steel. The zones of ductile and brittle fracture during DWTT characterize the quality of pipeline steels. In this paper, the Gurson-Tvergaard-Needleman (GTN) fracture models are coupled in a Finite Element model. The ductile and brittle fracture zones in the samples are analyzed under different conditions. The results show that the change in fracture mode during the DWTT is from the brittle to the ductile, then again to the brittle. The calculated absorbed energies during DWTT compare well with experimental findings. Finally, we present an analysis of the transition from ductile to brittle fracture under different conditions.

Publication Date


  • 2013

Citation


  • Wu, Y., Yu, H., Lu, C., Tieu, A. K., Godbole, A. R. & Michal, G. (2013). Transition of ductile and brittle fracture during DWTT by FEM. 13th International Conference on Fracture (ICF) (pp. 1648-1655). China: Curran Associates, Inc.

Scopus Eid


  • 2-s2.0-84898770738

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3359&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2350

Has Global Citation Frequency


Start Page


  • 1648

End Page


  • 1655

Place Of Publication


  • China