Dynamics explosion fracture and shock response analysis of explosive cutters in spacecraft

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (18) : 177-182.

LIU Huailiang, CUI Delin, YAN Shaoze

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Abstract

In order to reveal the shock characteristics and the influence of explosion on satellite during the separation process，the explosive cutters of clamp band system in spacecraft are taken as the research object, the three-dimensional finite element model of cut-off process for the explosive cutters is established by use of explicit dynamic software LS-DYNA. The speed and acceleration of shear knife in the process of explosion fracture are analyzed. Here the change of stress and strain and fracture features of typical fracture units on the link is discussed. And the characteristics of the exploding shock loading and structural response characteristics of the cutter are analyzed in different stages. A method of numerical simulation for the fracture process of explosive cutters in spacecraft is provided, which can also be regard as a reference for the simulation and presage of pyrotechnic shock environment in the process of satellite-rocket separation.

Key words

explosive cutter / impact load / fracture / dynamics / finite element analysis

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LIU Huailiang, CUI Delin, YAN Shaoze . Dynamics explosion fracture and shock response analysis of explosive cutters in spacecraft[J]. Journal of Vibration and Shock, 2015, 34(18): 177-182

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