Experimental and Numerical Research on Cylindrical Tubes under Outer Cylindrical Explosive Waves

Sui Yaguang,Zhang Dezhi,Tang Shiying,Chen Bo

doi:10.1155/2017/6150193

Sui Yaguang, Zhang Dezhi + Show 2 more

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https://doi.org/10.1155/2017/6150193

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Abstract

Cylindrical explosive loading has an important application in explosive working, researching on weapon damage, and explosive-driving load. This study uses experimental and numerical methods to study the response of long and thin tubes when subjected to cylindrical explosive loading. The flake-like charge and multipoint initiation technique were adopted to load cylindrical explosive waves. Experimental results showed that the method could produce uniform deformation in certain parts of the long tube, but partial spall injuries occurred after the explosion. The macroscopic and microscopic deformation of tubes were analyzed. Numerical simulations were conducted to investigate the detailed response of the tube subjected to a cylindrical explosive wave. The results indicate that the collision of explosive waves brought inconsistencies in pressure and velocity. The pressure and velocity in the collision region were significantly higher than those of other parts, which caused the collision region to be easily damaged.

Highlights

Converging cylindrical shock waves have been widely applied in explosive working, research on weapon damage, and the driving load in special occasions [1,2,3,4,5]
Lee [1] developed a technique for producing imploding cylindrical shock waves through imploding detonation waves
Matsuo [2] investigated the converging shock wave generated by instantaneous energy release over cylindrical surface

Summary

Introduction

Converging cylindrical shock waves have been widely applied in explosive working, research on weapon damage, and the driving load in special occasions [1,2,3,4,5]. Lee [1] developed a technique for producing imploding cylindrical shock waves through imploding detonation waves. Matsuo [2] investigated the converging shock wave generated by instantaneous energy release over cylindrical surface. Wu et al [3] introduced an improved experimental technique for the production of cylindrical converging shock waves. Apazidis et al [4] studied converging polygonal shock waves using experimental and theoretical analysis method. Grinenko, and Sayapin produced a sub-Mbr pressure on the axis of the implosion wave by an underwater electrical explosion of a cylindrical wire array

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