Three-dimensional Structural Analysis Approach for Aging Composite Solid Propellant Grains
Three-dimensional Structural Analysis Approach for Aging Composite Solid Propellant Grains
复制标题
老化复合固体推进剂颗粒的三维结构分析方法
DOI：
10.1002/prep.201300120
复制
发表时间：
2014-02-01
影响因子：
1.8
通讯作者：
Tang, Guo Jin
中科院分区：
文献类型：
--
作者：
Deng, Bin;Xie, Yan;Tang, Guo Jin
以交联度为老化变量，采用考虑老化演化的三维热粘弹性本构模型研究了复合固体推进剂药柱的粘弹性老化行为。通过积分算法将得到的粘弹性本构方程离散为增量形式，并根据增量规律提出了应力修正方法。随后，构建了基于Abaqus的用户材料子程序及其结构分析模块，并通过典型实例进行了验证。研究表明，结构分析结果具有较高的精度，相互吻合良好。所设计的分析模块为固体火箭发动机的寿命估算提供了有效的老化力学分析平台。
The viscoelastic aging behavior of composite solid propellant grains is studied by a three-dimensional thermoviscoelastic constitutive model with aging evolution, in which the crosslinking degree is taken as an aging variable. The resulting viscoelastic constitutive equations are numerically discretized into incremental form by integration algorithms, and the stress-updating method is presented according to incremental law. Subsequently, the Abaqus-based user material subroutine and its structural analysis module are constructed and validated through typical examples. Studies show that the results of structural analysis have high accuracy and are in well agreement with each other. The designed analysis module presents an effective aging-mechanical analysis platform for further lifespan estimation of solid rocket motors.