Modeling and simulation of the debonding process of composite solid propellants

2nd International Conference on Design, Materials, and Manufacturing

材料科学;机械制造

Feng, Tao^1 ; Xu, Jin-Sheng^1 ; Han, Long^1 ; Chen, Xiong^1

Department of Institute of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing

210094, China^1

关键词: Ammonium perchlorates;    Cohesive element method;    Composite solid propellant;    Damage evolution process;    Hydroxyl terminated polybutadienes;    Mesoscopic structure;    Model and simulation;    Optimization algorithms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/220/1/012020/pdf
DOI  :  10.1088/1757-899X/220/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to study the damage evolution law of composite solid propellants, the molecular dynamics particle filled algorithm was used to establish the mesoscopic structure model of HTPB(Hydroxyl-terminated polybutadiene) propellants. The cohesive element method was employed for the adhesion interface between AP(Ammonium perchlorate) particle and HTPB matrix and the bilinear cohesive zone model was used to describe the mechanical response of the interface elements. The inversion analysis method based on Hooke-Jeeves optimization algorithm was employed to identify the parameters of cohesive zone model(CZM) of the particle/binder interface. Then, the optimized parameters were applied to the commercial finite element software ABAQUS to simulate the damage evolution process for AP particle and HTPB matrix, including the initiation, development, gathering and macroscopic crack. Finally, the stress-strain simulation curve was compared with the experiment curves. The result shows that the bilinear cohesive zone model can accurately describe the debonding and fracture process between the AP particles and HTPB matrix under the uniaxial tension loading.