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1 Journal of KONES

1 2007

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Numerical-experimental investigation of failure energy of composite energy absorbing panels

Niezgoda T., Barnat W.

Journal of KONES

2007

Vol. 14, No. 4

307-318

The aim of the paper is an assessment of the influence of the applied fill on the energy absorbing capabilities of a composite element of a thin-walled structure under dynamic load. The experimental tests were carried out on the INSTRON universal testing machine. The analysis concerned energy absorbing elements in a shape of sleeves with additional foam fill. The numeric model charge was made like in previously carried out experiments, using cinematic input function. Analysed models were charged by a rigid plate, described by a material MATRIG type. Foam filler use had for result the energy absorption improvement; this is important in the case of modernisation of existing structures using foam filler. An important advantage of energy absorbing elements made of composite materials is their little mass. In the case of considering of protection elements for aviation industry, this factor is very important. The presented results are preliminary tests of energy absorbing filler choice and will be applied for numeric models validation. The conclusion of preliminary estimation of obtained elements is that the appropriate choice of filler material will permit to obtain more important energy necessary for destruction of energy absorbing structure. The future application of numeric analyse will facilitate the process of filler parameters optimisation.