Ge Siyu, Zhang Wenying, Sang Jian, Yuan Shuai, Lo Glenn V, Dou Yusheng
Chongqing Key Laboratory of Big Data for Bio Intelligence, Chongqing University of Posts and Telecommunications, Chongqing 40065, China.
Department of Chemistry and Physical Sciences, Nicholls State University, P.O. Box 2022, Thibodaux, LA 70310, USA.
Materials (Basel). 2019 Nov 16;12(22):3767. doi: 10.3390/ma12223767.
Material Point Method (MPM) mesoscale simulation was used to study the constitutive relation of a polymer bonded explosive (PBX) consisting of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) and a fluorine polymer binder F. The stress-strain variations of the PBX were calculated for different temperatures and different porosities, and the results were found to be consistent with experimental observations. The stress-strain relations at different temperatures were used to develop the constitutive equation of the PBX by using numerical data fitting. Stress-strain data for different porosities were used to establish the constitutive equation by fitting the simulation data to an improved Hashion-Shtrikman model. The equation can be used to predict the shear modulus and bulk modulus of the PBX at different densities of the sample. The constitutive equations developed for TATB/F PBX by MPM mesoscale simulation are important equations for the numerical simulations of the PBX at macroscale. The method presented in this study provides an alternative approach for studying the constitutive relations of PBX.
采用物质点法（MPM）中尺度模拟研究了由1,3,5-三氨基-2,4,6-三硝基苯（TATB）和氟聚合物粘结剂F组成的聚合物粘结炸药（PBX）的本构关系。计算了不同温度和不同孔隙率下PBX的应力-应变变化，结果与实验观测一致。利用数值数据拟合，通过不同温度下的应力-应变关系建立了PBX的本构方程。通过将模拟数据拟合到改进的哈希森-什特里克曼模型，利用不同孔隙率的应力-应变数据建立了本构方程。该方程可用于预测不同样品密度下PBX的剪切模量和体积模量。通过MPM中尺度模拟为TATB/F PBX建立的本构方程是PBX宏观尺度数值模拟的重要方程。本研究提出的方法为研究PBX的本构关系提供了一种替代方法。
