Research on Mechanical Model of EPDM Insulation Charring Layer

Abstract:

The coupling effect of physics, chemistry and mechanics is through charring layer in the process of ablation of the insulation material. Description of the structure and mechanical properties of charring layer is the critical factor to numerical computation for foretelling the ablation of insulation material. The characteristic of charring layer structure of EPDM insulation at sorts of ablating condition were analyzed, and based on characteristic of porous medium of charring layer, the mechanical model with porosity as parameter was modeled by using theory of solid porous medium. According to the intensity determination of charring layer, the coefficient of intensity model was determined, then, the failure criterion of charring layer was set up, which can provide the mechanical parameters of charring layer for numerical computation to foretell the ablation of insulation material.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 57-63
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.57
• Online since: January 2012
• Authors: Yi Hua Xu, Chun Bo Hu, Zhuo Xiong Zeng, Yu Xin Yang
• Keywords: Charring Layer, EPDM, Mechanical Model, Porous Medium, Solid Rocket Motor (SRM), Structural Characteristics

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