Storage-life prediction and relationship between maximum elongation and stabilizer depletion for a composite modified double base propellant (CMDB) propellant

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Mechanics of Time-Dependent Materials Pub Date : 2023-09-06 DOI:10.1007/s11043-023-09634-8

Jia-ming Liu, Tian-yi Li, Ming-feng Yang, Jian Zheng, Xiong Chen, Jin-sheng Xu

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Abstract

In an effort to predict the storage life of a composite modified double base propellant (CMDB propellant) at 298.15 K, we investigated the relationship between the maximum elongation of the propellant and its stabilizer depletion. Thermally accelerated aging experiments were carried out at 323.15 K, 333.15 K, 343.15 K, and 353.15 K. The change in the amounts of N-methyl-4-nitroaniline (MNA) content and the maximum elongation of the propellant at different thermal aging temperatures were measured and analyzed. A modified exponential aging model for CMDB propellant was proposed. With the use of both MNA content and maximum elongation as aging indicators, the storage life of CMDB propellants at 298.15 K was predicted using the modified Arrhenius equation. The aging mechanism of CMDB propellant was analyzed, and a correlation function model for the relationship between the maximum elongation and stabilizer depletion was established. The results show that the maximum elongation and MNA content decrease with aging time as the aging temperature increases. The fitting correlation coefficients of the modified exponential aging model exceed 0.97. The storage life of CMDB at 298.15 K is estimated to be 20.84 years and 19.19 years, based on the MNA content and maximum elongation, respectively. The validity of the correlation function is validated by comparing the prediction results of the correlation function and the aging model for the maximum elongation under different aging times. The overall error is less than 15%, indicating the validity for predicting the maximum elongation of CMDB propellant based on the consumption of MNA.

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复合改性双基推进剂贮存寿命预测及最大伸长率与安定剂损耗的关系

为了预测复合改性双基推进剂（CMDB 推进剂）在 298.15 K 下的贮存寿命，我们研究了推进剂的最大伸长率与其稳定剂消耗之间的关系。在 323.15 K、333.15 K、343.15 K 和 353.15 K 温度下进行了热加速老化实验，测量并分析了不同热老化温度下推进剂中 N-甲基-4-硝基苯胺（MNA）含量的变化和最大伸长率。提出了 CMDB 推进剂的修正指数老化模型。以 MNA 含量和最大伸长率作为老化指标，利用修正的 Arrhenius 方程预测了 CMDB 推进剂在 298.15 K 下的储存寿命。分析了 CMDB 推进剂的老化机理，并建立了最大伸长率与稳定剂消耗之间的相关函数模型。结果表明，随着老化温度的升高，最大伸长率和 MNA 含量随老化时间的延长而降低。修正指数老化模型的拟合相关系数超过 0.97。根据 MNA 含量和最大伸长率，估计 CMDB 在 298.15 K 下的储存寿命分别为 20.84 年和 19.19 年。通过比较相关函数和老化模型对不同老化时间下最大伸长率的预测结果，验证了相关函数的有效性。总体误差小于 15%，表明根据 MNA 的消耗量预测 CMDB 推进剂的最大伸长率是有效的。

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来源期刊

Mechanics of Time-Dependent Materials 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.