含能材料2024，Vol.32Issue(5)：518-527,10.DOI:10.11943/CJEM2023236
基于分子链演化的NEPE推进剂基体超弹本构模型
The Hyperelastic Constitutive Model of NEPE Propellant Matrix Based on Molecular Chain Evolution
刘俊 1梁爽 1刘向阳 2郜婕3
作者信息
- 1. 华中科技大学航空航天学院,湖北 武汉 430070
- 2. 北京理工大学宇航学院,北京 100081
- 3. 中国航天科技集团有限公司四院四十一所,陕西 西安 710025
- 折叠
摘要
Abstract
To reveal the relationship between the evolutions of polymer chains within the NEPE propellant matrix and the hyper-elastic mechanical behavior,a multiscale approach was adopted to investigate the evolution behavior and characterization mod-el of polymer chains under different deformation states.Firstly,based on the microscopic models of components such as matrix adhesives,curing agents,and plasticizers,a dynamic model describing the evolution of cross-linked and free chain configura-tions under complex deformation states was developed through molecular dynamics simulation of the matrix system Subsequent-ly,the free energy contributed bycrosslinked and free chains was quantitatively characterized based on statistical mechanics,and a hyperelastic constitutive model considering the cross-linking and entanglement effects was established.Finally,the devel-oped constitutive model was validated by using the quasi-static tensile experimental data of NEPE propellant matrix samples.Compared with the classical Arruda-Boyce model,the constitutive parameters in the present model have real physical signifi-cances and can be obtained by experimental methods,which enables the present model to better predict the hyperelastic behav-ior of the propellant matrix under different deformation states,and thus provide model for the regulation of mechanical proper-ties and component optimization of propellant matrix.关键词
推进剂基体/超弹性/本构模型/物理机制/分子动力学/高分子链密度Key words
propellant matrix/hyperelasticity/constitutive model/physical mechanism/molecular dynamics/chain density分类
军事科技引用本文复制引用
刘俊,梁爽,刘向阳,郜婕..基于分子链演化的NEPE推进剂基体超弹本构模型[J].含能材料,2024,32(5):518-527,10.
