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Viscoelastic constitutive model of HTPB composite propellant
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Journal Article
Viscoelastic constitutive model of HTPB composite propellant
2025
Overview
The nonlinear mechanical behavior and temperature sensitivity of HTPB propellant for solid rocket motors were investigated. The rate-dependent mechanical properties of the propellant were examined through a combination of experiments and numerical simulations. Experimental results demonstrate that the tensile mechanical properties of HTPB propellant are rate-dependent at 223 K and 323 K; stresses at a given strain gradually increase with increasing strain rate. By use a generalized nonlinear ZWT intrinsic model, the tensile mechanical behavior of HTPB propellant under a wide range of strain rates was to described. A numerical simulation of a uniaxial tensile test was performed using a UMAT subroutine. The results demonstrate that the model accurately represents the mechanical properties of the HTPB propellant.
Publisher
IOP Publishing
