ANALYSIS ON STRUCTURAL INTEGRITY OF PROPELLANT GRAINS USING SCHAPERY’S CONSTITUTIVE MODEL

摘要：

Physical properties of solid propellants used in solid rocket motors change significantly with age. In this paper, based on the constitutive relationship of viscoelastic material using the Schapery’s nonlinear model and the corresponding viscoelastic finite element method, the computational model is established to value structural integrity of propellant grains. The parameters in the Schapery’s model are obtained through the experiments. The constitutive equation is implemented into a finite element code for the analysis of propellant grains. A commercial finite element package ‘ABAQUS’ is used for the analysis and the model is introduced into the code through a user subroutine, UMAT. The stress and strain in three-dimension model of propellant grain is analyzed during the rise portion of the ignition event.

作者: QU Wenzhong WANG Guang ZHOU Wei QIANG Hongfu

作者单位: Department of Engineering Mechanics, Wuhan University, Wuhan 430072 P R China The Second Artillery Engineering College, Xi’an 710025 P R China

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）