The capability to ensure passenger safety is a core requirement of any transportation facility. For this reason, the concept of Crashworthiness, i.e. the capacity offered by a structure to absorb shocks during an accident and preserve occupant safety, over the years, gained a major role in the designing of transportation devices. Indeed, considerable effort has been expended by researchers in the study of shock-absorbing devices able to increase the safety performance. Actually, this paper introduces both a numerical and experimental assessment of the effectiveness of a new hybrid (metal-composite) shock absorber concept, fabricated by means of Additive Manufacturing. Additive technology allows some fundamental benefits such as the possibility to manufacture cores with a complex shape in sandwich panels , able to maximize the energy absorption capabilities. A numerical investigation on the energy absorption capabilities of different geometrical and material configurations has been carried out, to select the best performing configurations to be manufactured and tested to impact. Impact tests on core, skins and complete sandwich panels have been carried out to assess the capability to absorb impact energy under different boundary conditions.

A NUMERICAL-EXPERIMENTAL STUDY ON THE IMPCAT RESPONSE OF AN ADDITIVE MANUFACTED HYBRID METAL-COMPOSITE STRURCTURE

Andrea Sellitto;Aniello Riccio
2021

Abstract

The capability to ensure passenger safety is a core requirement of any transportation facility. For this reason, the concept of Crashworthiness, i.e. the capacity offered by a structure to absorb shocks during an accident and preserve occupant safety, over the years, gained a major role in the designing of transportation devices. Indeed, considerable effort has been expended by researchers in the study of shock-absorbing devices able to increase the safety performance. Actually, this paper introduces both a numerical and experimental assessment of the effectiveness of a new hybrid (metal-composite) shock absorber concept, fabricated by means of Additive Manufacturing. Additive technology allows some fundamental benefits such as the possibility to manufacture cores with a complex shape in sandwich panels , able to maximize the energy absorption capabilities. A numerical investigation on the energy absorption capabilities of different geometrical and material configurations has been carried out, to select the best performing configurations to be manufactured and tested to impact. Impact tests on core, skins and complete sandwich panels have been carried out to assess the capability to absorb impact energy under different boundary conditions.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/457250
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