摘要
The macroscopic mechanical properties of composite solid propellant are inseparably linked to its mesoscopic components and damage. A macro and mesoscopic constitutive model of composite solid propellant with void damage was developed based on the evolution of the mesostructure during the deformation process of composite solid propellants. The model takes into account the dependence of propellant temperature and strain rate, and is able to describe the different mechanical responses of propellant in tension and compression. The validity of the constitutive model is verified by tensile and compressive tests at different temperatures and strain rates. The macro and mesoscopic constitutive model is re-developed based on the user material subroutine interface UMAT provided by the finite element software, and applied to the structural integrity analysis of grain under low temperature ignition conditions, indicating that the safety factor of grain under low-temperature ignition conditions is 2. 56, and the structural integrity of grain meets the requirements. Finally, compared with the linear viscoelastic constitutive model based on Prony series, the proposed constitutive model can be used to more accurately analyze the structure of composite solid propellant grains.
投稿的翻译标题 | Research on the Viscoelastic Constitutive Model of Composite Solid Propellant Containing Damage Based on Mesostructure |
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源语言 | 繁体中文 |
页(从-至) | 3696-3706 |
页数 | 11 |
期刊 | Binggong Xuebao/Acta Armamentarii |
卷 | 44 |
期 | 12 |
DOI | |
出版状态 | 已出版 - 12月 2023 |
关键词
- composite solid propellant
- constitutive model
- low temperature ignition
- nonlinear viscoelasticity
- structural integrity