细观结构对HTPB推进剂力学性能影响的数值研究

为研究HTPB推进剂细观结构组成对其力学性能的影响,基于分子动力学算法生成了HTPB推进剂的细观颗粒填充模型,并引入双线性内聚力模型来描述颗粒/基体界面处粘结单元的力学响应。通过数值计算得到了不同配方HTPB推进剂单轴拉伸的应力云图和应力应变曲线。比较发现,在受载过程中RDX颗粒/基体界面几乎不发生脱粘,随着RDX含量的增加,推进剂的初始模量显著降低,但拉伸强度几乎不变。结论对HTPB推进剂配方的优化设计具有一定的参考价值。...

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Bibliographic Details
Published in功能材料 Vol. 49; no. 1; pp. 1078 - 1082
Main Author 封涛;许进升;韩龙;陈雄;周长省
Format Journal Article
LanguageChinese
Published 上海机电工程研究所,上海 201109%南京理工大学 机械工程学院,南京,210094%上海船舶电子设备研究所,上海,201108 30.01.2018
南京理工大学 机械工程学院,南京 210094
Subjects
HTPB推进剂
内聚力模型
力学性能
有限元模拟
细观结构
力学性能
HTPB propellant
finite element sim-ulation
HTPB推进剂
mesoscopic structure
细观结构
mechanical property
有限元模拟
内聚力模型
cohesive zone mode
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ISSN1001-9731
DOI10.3969/j.issn.1001-9731.2018.01.015

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Summary:为研究HTPB推进剂细观结构组成对其力学性能的影响,基于分子动力学算法生成了HTPB推进剂的细观颗粒填充模型,并引入双线性内聚力模型来描述颗粒/基体界面处粘结单元的力学响应。通过数值计算得到了不同配方HTPB推进剂单轴拉伸的应力云图和应力应变曲线。比较发现,在受载过程中RDX颗粒/基体界面几乎不发生脱粘,随着RDX含量的增加,推进剂的初始模量显著降低,但拉伸强度几乎不变。结论对HTPB推进剂配方的优化设计具有一定的参考价值。
Bibliography:To study the effect of mesoscopic structure on the mechanical properties of HTPB propellant,the mesoscopic particle filling model of HTPB propellant was established based on molecular dynamics algorithm and the bilinear cohesive zone model was employed to describe the mechanical response of the particle/matrix interface adhesive element.Then the stress nephogram and stress strain curves of different formula HTPB propellants under the uniaxial tensile load were obtained by the finite element numerical calculation.The result shows that there is almost no interface debonding between RDX and matrix.And with the content of RDX increasing,the propellant initial modulus decreases significantly,but the tensile strength is almost unchanged.This can give some reference values for the optimization design of the HTPB propellant formula.
50-1099/TH
ISSN:1001-9731
DOI:10.3969/j.issn.1001-9731.2018.01.015