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首页> 外文期刊>International journal of aerospace engineering >Effective Mechanical Property Estimation of Composite Solid Propellants Based on VCFEM
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Effective Mechanical Property Estimation of Composite Solid Propellants Based on VCFEM

机译：基于VCFEM的复合固体推进剂有效力​​学性能估算

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A solid rocket motor is one of the critical components of solid missiles, and its life and reliability mostly depend on the mechanical behavior of a composite solid propellant (CSP). Effective mechanical properties are critical material constants to analyze the structural integrity of propellant grain. They are estimated by a numerical method that combines the Voronoi cell finite element method (VCFEM) and the homogenization method in the present paper. The correctness of this combined method has been validated by comparing with a standard finite element method and conventional theoretical models. The effective modulus and the effective Poisson's ratio of a CSP varying with volume fraction and component material properties are estimated. The result indicates that the variations of the volume fraction of inclusions and the properties of the matrix have obvious influences on the effective mechanical properties of a CSP. The microscopic numerical analysis method proposed in this paper can also be used to provide references for the design and the analysis of other large volume fraction composite materials.
机译：固体火箭发动机是固体导弹的关键组成部分之一，其寿命和可靠性主要取决于复合固体推进剂（CSP）的机械性能。有效的机械性能是分析推进剂颗粒结构完整性的关键材料常数。它们是通过结合Voronoi单元有限元方法（VCFEM）和均质化方法的数值方法来估计的。通过与标准有限元方法和常规理论模型进行比较，已验证了该组合方法的正确性。估算了CSP的有效模量和有效泊松比随体积分数和组件材料性能而变化。结果表明，夹杂物体积分数的变化和基体的性能对CSP的有效力学性能有明显的影响。本文提出的微观数值分析方法也可为其他大体积分数复合材料的设计和分析提供参考。

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