Investigation of Fracture Criterion for HTPB Propellant

摘要：

　　The fracture toughness of HTPB propellant has a significant rate effect.In order to establish a fracture criterion considering rate effect for HTPB propellant,experiments were conducted at different loading rates.Two kinds of specimens were used to get the fracture properties.Stress intensity factor and J-integral were obtained by the single edge notched tension specimen test.A power law cohesive zone model was obtained by the experiment based inverse method.Through comparing we found that the stress intensity factor and J-integral cannot model the rate effect in fracture process.The cohesive zone model (CZM) has a constant critical separation distance at different loading rates and has a capability to model the rate effect during the crack initiation and propagation process.A finite element simulation in ABAQUS was given to demonstrate its capability to model the crack propagation.

关键词： Propellant Fracture Rate effect Crack

作者: Bo Han Yutao Ju Changsheng Zhou

作者单位: School of Mechanical Engineering,N JUST,Nanjing 210094,China

会议类型: 国际会议

会议名称: the 2012 International Conference on Manufacturing Engineering and Automation (2012年制造工程与自动化国际会议(ICMEA2012))

会议地点: 广州

会议语种:英文

页码: 745-749

在线出版日期: 2012-11-16（万方平台首次上网日期，不代表论文的发表时间）