Geometric Optimization of APCs anti Explosion Blades using LS-DYNA Finite Element Software

Subject Areas : optimization and simulation

Jalil Jamali ¹ , alireza rezaie ²

1 - Islamic Azad University, Shoushtar Branch, Shoushtar, Iran
2 - Islamic Azad University, Shoushtar Branch, Mechanical Engineering, M.S.student, Shoushtar, Iran

Received: 2019-12-07 Accepted : 2020-03-22 Published : 2020-12-01

Keywords: blast, Wave, APC LS-DYNA, Optimization, Explosion,

Abstract :

In this research, several different types of geometries have been compared to prevent the influence of an explosion wave on the glasses of the APCs. This was done using validation and then using LS-DYNA software. Pre and post-processing was done in LS-PrePost software. So, a mathematical function in this software was used to generate the pressure of the wave on the structure. In order to compare, the displacement parameter was used and the minimum total displacement of the structure as a criterion for optimal performance was considered. Also, two types of cosine curves, two types of polynomial curves (third and fourth order) and a flat blade are investigated. The results showed that for the use of a 150*100 mm2 square flat blade (which is half simulated according to the model's symmetry), the explosion of a wave coming from a distance of 75 mm on the adjacent sheet requires a sheet with a thickness of 11 mm. Using a curved blade, this thickness is reduced to 3 mm. According to the recent issue, the use of curved blades will lead to a sharp decrease in the weight of armored equipment.

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