摘要
为准确建立三氨基三硝基苯(TATB)基高聚物粘接炸药(PBX)材料的强度准则,通过自主研制的主动围压试验机获取了不同温度(22.5,35,50℃),不同围压(0～10 MPa)下材料的强度;根据单轴拉伸、单轴压缩以及围压压缩实验数据,采用传统Drucker-Prager(D-P)以及双曲D-P强度准则分别建立了不同温度下TATB基PBX材料的强度模型,并分析了其对于强度实验数据的预测精度。结果表明,双曲D-P强度准则对于22.5,35,50℃下强度实验数据的预测相对误差最大分别为2.41%,3.46%,5.22%,均方根误差分别为0.42,0.38,0.44 MPa,优于传统D-P强度准则结果;对于间接三轴拉伸和压缩破坏应力状态的预测,其相对误差分别为4.93%和12.14%,总体上均优于传统D-P、Mohr-Column、双剪以及单轴强度准则。考虑中主应力影响且处处正则的双曲D-P强度准则能准确预测不同温度下TATB基PBX材料的强度特性。
To accurately establish the strength criterion of TATB‐based PBX materials,the strength data under different confining pressures(0-10 MPa)and different temperatures(22.5,35,50℃)were obtained through the self‐developed active confining pressure tester.Based on the experimental data of uniaxial tension,uniaxial compression and confining pressure compression,traditional Drucker‐Prager(D‐P)and hyperbolic D‐P strength criteria were used to establish the strength model of TATB‐based PBX at different temperatures,and the prediction accuracy for experimental strength data was analyzed.Results show that the maximum relative errors of the hyperbolic D‐P strength criterion at 22.5,35℃and 50℃are 2.41%,3.46%and 5.22%,respectively,and the root mean square errors are 0.42,0.38 MPa,and 0.44 MPa,respectively,which are better than those of the traditional D‐P strength criterion.The relative errors for the prediction of indirect triaxial tensile and compressive failure stress are 4.93%and 12.14%respectively and they are superior to the traditional D‐P,Mohr‐Column,twin shear and uniaxial strength criteria.The hyperbolic D‐P strength criterion of considering the influence of middle principal stress and being everywhere regular,can accurately predict the strength characteristics of TATB‐based PBX materials at different temperatures.
作者
袁洪魏
赵龙
董天宝
颜熹琳
唐维
YUAN Hong-wei;ZHAO Long;DONG Tian-bao;YAN Xi-lin;TANG Wei(Institute of Chemical Materials,CAEP,Mianyang 621999,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2019年第1期74-78,93,共6页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(11604309)
