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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (12): 3861-3867.doi: 10.7527/S1000-6893.2015.0089

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Rate-dependent property of propellant and inhibitor interface debonding

YU Jiaquan1, XU Jinsheng1, CHEN Xiong1, ZHOU Changsheng1, JIA Deng1, LI Hongwen2   

  1. 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
    2. Jinxi Industries Group Co. Ltd., Taiyuan 030027, China
  • Received:2015-01-08 Revised:2015-03-26 Online:2015-12-15 Published:2015-04-27
  • Supported by:

    Natural Science Foundation of Jiangsu Province (BK20140772)

Abstract:

The interfacial property between propellant and inhibitor has a significant impact on the working stability of the solid rocket motor (SRM). In order to investigate the debonding property of the interface between the composite modified double-base (CMDB) propellant and the ethylene-propylene-diene monomer (EPDM) inhibitor at different loading rates, an test research is conducted using double cantilever beam (DCB) specimen and the load-displacement curves are obtained. Meanwhile, an interface model is proposed based on the rate-dependent cohesive zone model (CZM) and the relevant parameters are inversed by the Hooke-Jeeves optimization algorithm. The model's accuracy is verified by comparing the multistage loading experiment curve with the simulation curve. The result shows that the change trend is consistent and the tolerance is less than 15%, which certificates that the interface model has some reference values for the debonding research in the solid rocket motor.

Key words: solid rocket motor, interface debonding, rate-dependent cohesive zone model, finite element method, parametric inversing identification

CLC Number: