Abstract
A piston type explosive bolt is modeled by using a hydrocodes AUTODYN. The influence of the charge amount on the separation shock is analyzed. The results show that the separation shock of the piston type explosive bolt mainly includes two aspects: the shock caused by explosive detonation and the impact of the piston at the end of stroke. As the charge amount increases, the collision speed of piston first increases and then decreases, and the separation shock first increases and then stabilizes.
Highlights
A piston type explosive bolt is a simple, highly reliable and efficient pyrotechnic release device widely used in aerospace industry [1, 2]
Huang [20] analyzed the effect of pre-tightening force on the output shock of a shear pin type explosion bolt by LS-DYNA
In order to study the separation shock characteristics, the explosive bolts were mounted in the center of a 60 cm×60 cm×1 cm square 2024 aluminum alloy plate suspended by four bungees
Summary
A piston type explosive bolt is a simple, highly reliable and efficient pyrotechnic release device widely used in aerospace industry [1, 2]. Han [14,15,16,17] used AUTODYN to study the shock generation and propagation characteristics of the “ridge-cut” explosive bolt. Wang [18] used LS-DYNA to analyze the three different shock sources of a shear pin type explosive bolt. Huang [20] analyzed the effect of pre-tightening force on the output shock of a shear pin type explosion bolt by LS-DYNA. The piston type explosive bolt involves internal component movements, and its shock generation mechanism is more complicated. The separation behaviors of a piston type explosive bolt are simulated by hydrocodes AUTODYN, and the effect of the charge amount on separation velocity and separation shock are especially analyzed
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