基于连续损伤模型的复合固体推进剂力学性能研究

Research on Mechanics Performance of Composite Propellant with Continuum Damage Mechanics

摘要:

为了模拟复合固体推进剂本构关系,利用连续损伤力学理论并耦合线性累积损伤来建立含有损伤变量的本构模型。模型中推进剂累积损伤利用Miner线性累积损伤法则,损伤演化利用蠕变损伤演化规律,无损条件下的推进剂本构关系利用三元件波因廷模型。该模型提供了一种基于损伤本构关系来研究推进剂力学性能变化的有效方法。

Abstract:

The methods of continuum damage mechanics can consistently incorporate existing propellant linear cumulative damage (LCD), which can better simulate the propellant constitutive behavior. The Miner’s LCD models was applied in the model, the damage evolution law apply propellant creep damage evolution law. The viscoelastic material model with no damage uses Poynting model that is made up of three components. It provides a potential path to the coherent development of corresponding damage-based constitutive models.