Nonlinear Viscoelastic Analysis Of Double Base Propellant
This study presents the characterization of the nonlinearly viscoelastic behavior of double base propellant (DBP) using Schapery-type constitutive model in the different conditions of temperature,strain level and strain rate.A recursive-iterative numerical algorithm is generated for the Schapery-type nonlinearly viscoelastic constitutive and implemented in a displacement-based finite element (FE) code for ABAQUS user material subroutines.Then,the model parameters are obtained by analyzing the response of creep-recovery tests and constant rate tensile tests at different temperatures,strain levels and strain rates.And find a linear relationship between temperatures and the effective stresses which determine the limit of linear viscoelactic.The FE model with the calibrated time-dependent and nonlinear material parameters is used to simulate the creep-recovery tests and the constant rate tensile tests,and reasonable predictions are shown.
Nonlinear Viscoelastic Double base propellant Creep-recovery Recursive
Jin Sheng Xu Yu Tao Ju Chang Sheng Zhou
School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
国际会议
广州
英文
1147-1151
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）