Abstract
For several decades, a blast wave due to explosive detonation has been investigated extensively. Base on a significant amount of experimental data, the blast wave propagation has been predicted at specific conditions. However, only spherical shape of explosive has been considered in most studies. Recently, it was noted that the shape of explosive influences the blast wave propagation significantly. In this study, a finite element analysis was carried out to investigate the effect of the shape of explosive on the blast wave propagation. Two different shapes of explosive were compared in blast wave propagation; spherical and cylindrical shape. It was found that the spherical and cylindrical shape blast show different characteristics in the blast wave propagation. The spherical blast showed the isotropic wave propagation as verified by experimental data. However, the cylindrical blast showed more concentrated and faster propagation in the axial direction
Highlights
IntroductionFrom early stage of investigating the explosive blast, only spherical shape of explosive was investigated in terms of the pressure, impulse, arrival time and other parameters [2]
In defense industry, the effects of explosive blast have been an important issue to address
The peak pressure in the axial direction is 2.12 MPa, while the peak pressure in the radial direction is 1.62 MPa, which is same as the peak pressure in the x and y directions for the spherical blast
Summary
From early stage of investigating the explosive blast, only spherical shape of explosive was investigated in terms of the pressure, impulse, arrival time and other parameters [2]. These empirical data enabled predicting the blast phenomena, the shape of explosive influences the blast wave propagation considerably [3,4]. Due to the lack of experimental data on various explosive shapes, a finite element analysis has been used to predict the blast wave propagation. Each method has its own advantages in calculating the behaviour of solid structures or gas flows [5]. Two different shapes of explosive were simulated by using a finite element analysis to investigate the influence of the shape of explosive charge on the blast wave propagation
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