Title: Numerical simulation on the interface debonding in solid propellant under large deformation by a cohesive zone model

Authors: Mei Zhang; Jiangtao Zhang; Pengcheng Zhai; Lisheng Liu; Huiji Shi

Addresses: Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. ' Key laboratory for Applied Mechanics of Ministrator of Education, Tsinghua University, Beijing 100084, China

Abstract: A new algorithm based on the artificial interaction force between neighbouring particles are introduced to build microstructure models of solid propellant, and the numerical simulation on the non-linear properties of solid propellants under large deformation are performed by using the remeshing technique based on the finite element code ANSYS. The binder/particle interface debonding is modelled through cohesive zone models. The results show that the interface debonding of large particles precedes that of small particles. The overall strains at which interface debonding takes place and the predicted effective stresses of propellants decrease with the decreasing of interface strength. At large strains, the load is mainly carried by the binder network, which is formed due to severe interface debonding. The simulated microscopic deformation modes of solid propellants are well consistent with those of experiments.

Keywords: solid propellant; microstructure modelling; cohesive interface models; large deformation; interface debonding; finite element method; FEM; interface strength; simulation.

DOI: 10.1504/IJMPT.2011.044918

International Journal of Materials and Product Technology, 2011 Vol.42 No.1/2, pp.98 - 109

Published online: 07 Mar 2015 *

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