Study of the shock wave effect on the deformation of the vehicle bottom using deformable energy absorbers

Abstract

The paper reports a study on the effect of a shock wave generated during the detonation of 1.5 kg TNT  on the deformation of a multi-layered energy absorber. The experiments were carried out using a custom- designed testing station. The detonation of the charge was performed using a steel plate with a blind hole in accordance with the requirements of the NATO (North Atlantic Treaty Organization) AEP -55 (Allied Engineering Publication) volume 2 document. In the tests, the total and plastic deformations of the plate modelling the basic armour of the lower part of the vehicle in configurations without and with a shock wave absorbing element (energy absorber) were measured. The comb gage method reported by the US Army Developmental Test Command was used in measurements of the total deformation of the model. The study has shown that an appropriate design of the energy absorber and the use of suitable materials in its fabrication allow the total deformation to be reduced. Moreover in this article numerical simulations of the deformation phenomenon of the multi-layered energy absorbers were shown. Numerical simulations have shown high numerical model compliance compared to the experimental studies. In the studies were achieved about 99 percent numerical with the real model correlation.

DOI: http://dx.doi.org/10.5755/j01.mech.23.6.14119