Experimental and numerical studies on the failure modes of steel cabin structure subjected to internal blast loading. (December 2017)

• Record Type: Journal Article
• Authors: Yao, Shujian; Zhang, Duo; Lu, Fangyun; Li, Xiangcheng
• Is Part Of: International journal of impact engineering. Volume 110(2017)
• Page Start: 279
• Page End: 287
• Publication Date: 2017-12
• Subjects: Internal blast -- Failure modes -- Failure process -- Steel cabin -- Experiment study; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2017.03.006
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlights: Experiments of internal blast in steel cabins. Failure process of internal blast from high-speed camera. "+"-shaped and sphere-shaped damage forms were observed. Five kinds of failure modes were concluded and validated by experiments. Abstract: Two series of experiments were conducted with different dimension and different masses of explosive. The failure processes of the side plate were recorded by using high-speed photography system. Damage features of the experimental results were analyzed. The results show that the damage degree increases with the increasing of TNT mass. In larger TNT mass cases, cracks produce in both the edge and the central of side plate, and some plates may eject out with relatively high launch velocity which are destructive to the adjacent cabins. During the deformation process, the edge and corner area of side plate may produce large deformation due to the intensified internal shock waves which is different from external explosion. Meanwhile, a number of numerical simulations were carried out by using the validated numerical method. Through analyzing the numerical and experimental results, three damage forms of cross-shaped damage, curve-shaped damage and sphere-shaped were observed. In cross-shaped damage form, six failure modes were concluded: plastic deformation (mode I); petalling in plates center (mode II*C ); Capping in plates center (mode IIC ); corner shear failure (mode IIIin ); edge tearing (mode II); and shear failure over entire plate (mode III). In addition, the failure process and mechanisms of each mode were also analyzed.