改性双基推进剂黏弹-黏塑性本构模型

doi:10.7527/S1000-6893.2016.0238

固体力学与飞行器总体设计

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改性双基推进剂黏弹-黏塑性本构模型

王鸿丽, 许进升, 陈雄, 周长省

南京理工大学机械工程学院, 南京 210094

收稿日期:2016-06-07 修回日期:2016-08-17 出版日期:2017-04-15 发布日期:2017-05-12
通讯作者: 许进升 E-mail:xujinsheng@njust.edu.cn
基金资助:
江苏省自然科学基金（BK20140772）

Viscoelastic-viscoplastic constitutive model for modified double base propellant

WANG Hongli, XU Jinsheng, CHEN Xiong, ZHOU Changsheng

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Received:2016-06-07 Revised:2016-08-17 Online:2017-04-15 Published:2017-05-12
Supported by:
Natural Science Foundation of Jiangsu Province (BK20140772)

摘要/Abstract

摘要：

为了表征改性双基推进剂的力学行为，推导出改性双基推进剂黏弹-黏塑性本构模型。利用一系列蠕变-回复试验，将材料的总应变分离为黏弹性应变和黏塑性应变，使用最小二乘法获得了黏弹性参数，使用Nelder-Mead单纯形优化算法，结合后向Euler数值方法获得了黏塑性参数。通过不同应力水平和不同加载时间的蠕变-回复试验对模型进行了验证，结果表明，在应力水平较低或加载时间较短的情况下，模型预测与试验值变化趋势基本一致，模型获得的黏弹性应变与黏塑性应变在总应变中所占的比例与试验吻合。改性双基推进剂黏弹-黏塑性本构模型能够在一定范围内描述材料的力学性能。

关键词: 航空航天推进系统, 固体力学, 改性双基推进剂, 黏弹-黏塑性模型, 蠕变-回复

Abstract:

In order to characterize mechanical properties of modified double base propellant, a viscoelastic-viscoplastic constitutive model for modified double base propellant is developed. A series of creep-recovery tests is done to separate the total strain of material into viscoelastic strain and viscoplastic strain. The least square method is used to get viscoelastic parameters, and Nelder-Mead simplex optimization algorithm is combined with backward Euler method to get viscoplastic parameters. Creep-recovery tests under different stress levels and different loading times are conducted to verify the model. The results show that with lower stress levels or shorter loading time, the variation trend of model prediction is consistent with that of the test value,and the percentage of viscoelastic strain and viscoplastic strain in total strain obtained from model agree with that by test. It is concluded that the mechanical properties of the modified double base propellant can be described to some extent by the viscoelastic-viscoplastic constitutive model.

Key words: aerospace propulsion system, solid mechanics, modified double base propellant, viscoelatic-viscoplastic model, creep-recovery

中图分类号:

V512

王鸿丽, 许进升, 陈雄, 周长省. 改性双基推进剂黏弹-黏塑性本构模型[J]. 航空学报, 2017, 38(4): 220505-220505.

WANG Hongli, XU Jinsheng, CHEN Xiong, ZHOU Changsheng. Viscoelastic-viscoplastic constitutive model for modified double base propellant[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(4): 220505-220505.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

改性双基推进剂黏弹-黏塑性本构模型

Viscoelastic-viscoplastic constitutive model for modified double base propellant

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