Compressive Behavior of TATB Grains inside TATB-Based PBX Revealed by In-Situ Neutron Diffraction
Yi Tian1, Hong Wang1, Chang-Sheng Zhang1, Qiang Tian1, Wei-Bin Zhang2, Hong-Jia Li1, Jian Li1, Ben-De Liu2, Guang-Ai Sun1, Tai-Ping Peng1, Yao Xu2**, Jian Gong1**
1Key Laboratory for Neutron Physics of Chinese Academy of Engineering Physics, Institute of Nuclear Physics and Chemistry, Mianyang 621900 2Institute of Chemical Materials, Mianyang 621900
Abstract：We investigate the (002) lattice strain evolution of triaminotrinitrobenzene (TATB) grains inside one TATB-based plastic bonded explosive (PBX) through the in-situ neutron diffraction. By comparing the untreated specimen with the thermal-treated one, it is found that the volume-average response of measured TATB grains remains nearly elastic during quasi-static uniaxial compression. The observed changes in TATB (002) lattice strains correlate tightly with the evolution of damage. A damage parameter defined by the macroscopically determined residual strain is further used to describe the damage degree of PBX, which suggests that the compressive behavior of TATB-based PBX is significantly influenced by the damage evolution.
Hutchings M T, Withers P J, Holden T M and Lorentzen T 2005 Introduction Characterization Residual Stress By Neutron Diffraction (US: CRC Press) chap 3 p 84
2017, Vol. 34 
