Numerical Simulation of Particle Debonding of HTPB Propellant by Cohesive Zone Models

摘要

HTPB propellant is the high filled particulate elastomeric matrix composite. Debonding of particle/matrix interfaces can significantly affect the macroscopic behavior of composite propellant. This study starts from modeling based on cohesive zone concept, and numerical simulations are carried out to model the propellant material and describe damage processes to discover damage mechanism. Two cohesive zone models of conic type and bilinear type are adopted in two model particulate composite systems with finite element method; the scheme was shown to capture effects associated with the interface strength and the interactions between particles.