Transition of ductile and brittle fracture during DWTT by FEM

摘要：

　　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.

关键词： Energy pipeline ductile fracture brittle fracture DWTT

作者: YouYou WU Hailiang YU Cheng LU Kiet TIEU Ajit GODBOLE Guillaume MICHAL

作者单位: School of Mechanical,Materials & Mechatronic Engineering,University of Wollongong,NSW 2500,Australia School of Mechanical,Materials & Mechatronic Engineering,University of Wollongong,NSW 2500,Australia

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）