Creep properties and prediction model of composite solid propellant

Abstract

In order to describe the creep properties of HTPB propellant, uniaxial tensile creep tests of propellant under different stresses were conducted. Based on the principle of viscoelastic theory, the Burgers model was used to describe the creep properties of the propellant. Combined with the experimental data, the parameters of Burgers model under different stresses were determined, and the model parameters were expressed as a function related to creep stress, and finally the model was verified by using the test data under creep stress 0.2 MPa. The results show that the Burgers model can describe the creep properties of the composite propellant well.