Experimental study of polyurea-coated fiber-reinforced cement boards under gas explosions  

作　　者：Meng Gu Xiao-dong Ling An-feng Yu Guo-xin Chen Hao-zhe Wang Han-xiang Wang 

机构地区：[1]State Key Laboratory of Safety and Control for Chemicals,SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao,266104,China [2]College of Mechanical and Electronic Engineering,China University of Petroleum(East China),Qingdao,266580,China

出　　处：《Defence Technology（防务技术）》2023年第5期201-213,共13页Defence Technology

基　　金：funded by National Natural Science Foundation of China(No.12002392).

摘　　要：Five types of polyurea elastomers were synthesized by changing the isocyanate component and the mechanical properties of polyurea materials were measured. Fiber-reinforced cement boards(FRCB)strengthened by polyurea with different formulations were processed, and a series of experiments were carried out on the specimens with gas explosion devices. The results showed that the conventional mechanical properties of different types of polyureas had their own advantages. Based on the gas explosion overpressure criterion, the blast resistances of reinforced plates were quantitatively evaluated,and the best polyurea was selected to guide the formulation design. The three typical failure modes of polyurea-reinforced FRCBs were flexural, shear, and flexural-shear failure. Dynamic thermodynamics and shock wave spectral analysis revealed that the polyurea did not undergo a glass transition in the gas explosion tests but retained its elastic properties, allowing it to effectively wrap the fragments formed by the brittle substrates.

关 键 词：POLYUREA Fiber-reinforced cement board Gas explosion Failure criterion Glass transition 

分 类 号：TU352.13[建筑科学—结构工程] TU528.58