Effects of aging on mechanical sensitivity threshold and thermal decomposition characteristic of RDX/HMX

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术) Pub Date : 2025-03-01 DOI:10.1016/j.dt.2024.10.011

Shian Zhang , Yanru Wang , Zeshan Wang , Deyun Liu , Mingkun Fang , Zhiyong Ma , Xingliang Wu , Xibo Jiang , Sen Xu , Dabin Liu

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Abstract

In order to analyze the influences of storage aging on the safety of typical elemental explosives, the aged cyclotrimethylene trinitramine (RDX) and cyclotetramethylene tetranitramine (HMX) were prepared by isothermal aging tests. The reaction thresholds of aged RDX and HMX under any ignition probability were studied by Langlie-Optimal D method. The thermal decomposition characteristics of RDX and HMX after aging were analyzed by DSC and ARC. Experimental results showed that compared with unaged RDX and HMX, on the one hand, the critical impact energy and critical friction of RDX and HMX aged for 14, 28, and 56 days are significantly reduced at an explosion probability of 50%, 0.01%, and 0.0001%, respectively. With the increase of aging time, the mechanical sensitivity of RDX and HMX increases obviously. On the other hand, the initial decomposition temperature of RDX and HMX after 56 days of aging decreases, the decomposition heat decreases, the activation energy increases, and the reaction difficulty increases.

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时效对RDX/HMX机械敏感阈值及热分解特性的影响

为了分析贮存老化对典型单质炸药安全性的影响，采用等温老化试验制备了老化的环三亚甲基三硝胺（RDX）和环四亚甲基四硝胺（HMX）。采用Langlie-Optimal D方法研究了老化RDX和HMX在任意着火概率下的反应阈值。采用DSC和ARC分析了RDX和HMX时效后的热分解特性。实验结果表明，与未老化的RDX和HMX相比，老化14天、28天和56天的RDX和HMX在爆炸概率分别为50%、0.01%和0.0001%的情况下，临界冲击能和临界摩擦显著降低；随着时效时间的延长，RDX和HMX的机械敏感性明显增大。另一方面，RDX和HMX经过56 d时效后的初始分解温度降低，分解热减小，活化能增大，反应难度增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering

CiteScore

8.70

自引率

0.00%

发文量

728

审稿时长

25 days

期刊介绍： Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.