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弹箭与制导学报 >

2025 , Vol. 45 >Issue 6: 1146 - 1154

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.06.023

学术文章

DNAN基熔铸炸药动态拉伸力学行为及损伤特性研究

  • 赵东 , 1 ,
  • 屈可朋 , 1, 2, * ,
  • 胡雪垚 1 ,
  • 王奕鑫 1 ,
  • 肖玮 1
展开
  • 1 西安近代化学研究所,陕西 西安 710065
  • 2 西北工业大学 化学与化工学院,陕西 西安 710129
屈可朋(1983—),男,研究员。E-mail:。

赵东(2001—),男,硕士。E-mail:。

收稿日期: 2024-11-21

  网络出版日期: 2026-01-24

基金资助

国防重大基础预研专项

收起

Study on Dynamic Tensile Mechanical Behavior and Damage Characteristics of DNAN-based Melt-cast Explosive

  • ZHAO Dong , 1 ,
  • QU Kepeng , 1, 2, * ,
  • HU Xueyao 1 ,
  • WANG Yixin 1 ,
  • XIAO Wei 1
Expand
  • 1 Xi’an Modern Chemistry Research Institute,Xi’an 710065,Shaanxi,China
  • 2 School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710129,Shaanxi,China

Received date: 2024-11-21

  Online published: 2026-01-24

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摘要

为获取2,4-二硝基苯甲醚(DNAN)基熔铸炸药在动态拉伸条件下的力学性能及损伤特性,结合分离式霍普金森压杆(Split Hopkinson Pressure Bar,SHPB)加载技术开展动态巴西实验,获得了不同加载强度下DNAN基熔铸炸药的间接拉伸强度;通过高速摄影,获取了试样表面裂纹的萌生演化过程,并使用数字图像相关(Digital Image Correlation,DIC)技术得到了试样表面的位移场和应变场分布;借助扫描电镜(Scanning Electron Microscope,SEM)观察并分析了加载前后试样断面的损伤特征;建立了该炸药的黏弹性统计裂纹本构模型(Visco-SCRAM),对动态巴西试验展开数值模拟,得到了试样位移场、应变场、应力场和损伤度分布云图。结果表明:该炸药在130GPa/s、190GPa/s、340GPa/s应力率下的间接拉伸强度和失效应变分别为2.14MPa和6.11‰、2.96MPa和2.38‰、5.10MPa和1.64‰;间接拉伸加载下,试样断面发生了较多的界面脱黏,随加载强度增大HMX颗粒破坏模式由沿晶断裂向穿晶断裂转变;数值模拟与试验结果符合较好,建立的模型能有效描述炸药在间接拉伸条件下的动态力学行为和损伤破坏过程。

关键词： 材料力学; DNAN基熔铸炸药; 巴西试验; 力学行为; 损伤; 数值模拟

本文引用格式

赵东 , 屈可朋 , 胡雪垚 , 王奕鑫 , 肖玮 . DNAN基熔铸炸药动态拉伸力学行为及损伤特性研究[J]. 弹箭与制导学报, 2025 , 45(6) : 1146 -1154 . DOI: 10.15892/j.cnki.djzdxb.2025.06.023

Abstract

In order to obtain the mechanical properties and damage characteristics of 2,4-dinitroanisole (DNAN)-based melt-cast explosive under dynamic tensile conditions.Dynamic Brazilian test were carried out by combining the SHPB technique.The indirect tensile strengths of the DNAN-based melt-cast explosive were obtained under different loading intensities.The crack germination and evolution process on the surface of the sample was obtained through high-speed photography and the displacement field and strain field distributions on the surface of the sample were obtained by DIC technique.The damage characteristics of the sample section before and after loading were observed and analyzed with the SEM.The Visco-SCRAM model was established,and numerical simulation was carried out in dynamic Brazilian test to obtain the cloud diagrams of the sample's displacement field,strain field,stress field and the distribution of the degree of damage.The results showed that the indirect tensile strength and strain to failure of the explosive at the stress rates of 130GPa/s,190 GPa/s,and 340GPa/s were 2.14MPa and 6.11‰,2.96MPa and 2.38‰,and 5.10MPa and 1.64‰,respectively.More interfacial debonding occurred in sample sections under indirect tensile loading,and with the increase of loading intensity HMX particle damage mode shifted from intergranular fracture to transgranular fracture.The numerical simulation conforms well to the experimental results,and the established model can effectively describe the dynamic mechanical behavior and damage destruction process of explosives under indirect stretching conditions.

Key words： material mechanics; DNAN-based melt-cast explosive; Brazilian test; mechanical behavior; damage; numerical simulation

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