Huang Yuqi, Zhao Honghua, Bai Ruixiang, et al. Thermo-chemo-mechanical coupling numerical study on the forming process of solid propellant. Mechanics in Engineering, xxxx, x(x): 1-7. DOI: 10.6052/1000-0879-24-366
Citation: Huang Yuqi, Zhao Honghua, Bai Ruixiang, et al. Thermo-chemo-mechanical coupling numerical study on the forming process of solid propellant. Mechanics in Engineering, xxxx, x(x): 1-7. DOI: 10.6052/1000-0879-24-366

THERMO-CHEMO-MECHANICAL COUPLING NUMERICAL STUDY ON THE FORMING PROCESS OF SOLID PROPELLANT

  • This paper establishes a thermo-chemo-mechanical coupling model to investigate the curing process of solid propellant, focusing on the distribution characteristics of temperature, curing degree, and surface stress at various stages, including the curing-heating, curing-holding, and cooling-ejection processes. The results show that during the curing stage, the internal temperature and curing degree of the propellant transform from a higher-outside-lower-inside to a higher-inside-lower-outside pattern. During the curing and cooling stages, the stress on the external surface increases nonlinearly. A higher curing holding temperature can significantly shorten the solidification time, but it also exacerbates the non-uniformity of curing degree within the propellant, leading to an increase in the maximum stress at each stage and the maximum deformation after ejection.
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