Experimental study on surface ignition reaction evolution of pressed PBX-A under inertial mass confinement
Tian Qiu,
Shang-gang Wen,
Tao Li,
Haibo Hu,
Xiaogan Dai,
Chuan-guo Chai,
Hua Fu,
Hailin Shang,
Yushi Wen
Affiliations
Tian Qiu
CAS Key Laboratory of Mechanical Behaviour and Design of Materials (LMBD), Department of Modern Mechanics, University of Science and Technology of China, Baohe District, 230026 Hefei City, Anhui Province, China
Shang-gang Wen
Institute of Chemical Materials, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Tao Li
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Haibo Hu
China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Xiaogan Dai
Institute of Chemical Materials, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Chuan-guo Chai
Institute of Chemical Materials, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Hua Fu
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Hailin Shang
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
Yushi Wen
Institute of Chemical Materials, China Academy of Engineering Physics, Youxian District, 621000 Mianyang City, Sichuan Province, China
An experimental apparatus was designed to study the non-shock initiation reaction evolution process of a HMX (cyclotetramethylenete-tranitramine)-based pressed PBX (Plastic Bonded Explosive)-A column under the main constraint of the inertial mass of the explosive bulk, with strong bottom and circumferential confinements and with the strength of a PMMA plate cover as the threshold to control the internal reaction pressure. The HMX-based pressed PBX-A column was ignited by black powder. The experimental results show that the reaction violence was quite mild, and the estimated amount of explosive consumed at the time of the PMMA plate cracking was only 1.8% of the thickness. The velocity curve of the constrained surface shows that the internal reaction pressure at the initial stage of the structural deformation shows the “quasi-isobaric” characteristic, and the estimated reaction pressure at this stage was about 157.41 MPa.
