Showing papers by "Simonetta Boria published in 2014"
TL;DR: In this paper, an analytical procedure was developed to capture the energy absorption capability of square impact attenuators with a square frusta geometry, which can absorb a fixed impact energy.
26 citations
TL;DR: In this article, a mathematical approach on the failure mechanisms, pertaining to the stable mode of collapse of thin-walled composite structures subjected to axial loading, is investigated from an energetic point of view.
5 citations
01 Jan 2014
TL;DR: In this article, the impact modeling of a frontal impact attenuator for a specific racing car is investigated based on the application of an explicit nonlinear finite element code, such as LS-DYNA, and on the experimental verification of the results, by means of an appropriately instrumented drop weight test machine.
Abstract: Composite have been increasingly used in cars for their advantages of lightweight, high strength, corrosion resistance and easy manufacturing. Recently, carbon fiber reinforced plastic (CFRP) gains growing popularity in numerous advanced and high performance applications for crashworthiness thanks to its superior impact resistance, respect to metals or other composite materials. Maximising impact protection of carbon fibre reinforced plastic laminated composite structures, predicting and preventing the negative effects of impact on passengers are paramount design criteria for ground vehicles. In this paper the impact modelling of a frontal impact attenuator for a specific racing car will be investigated. The current work is based on the application of an explicit nonlinear finite element code, such as LS-DYNA, and on the experimental verification of the results, by means of an appropriately instrumented drop weight test machine. The thin-walled layered structure was numerically analysed using both shell and solid elements in order to reproduce the laminate as closely as possible, taking into account also the possibility during crushing of an interlaminar failure which plays a significant role during energy absorption mechanism. The proposed models are able to predict, with a good level of accuracy, the deformation process of such impact attenuator when subjected to dynamic loading as those imposed by technical regulation.
2 citations
01 Jan 2014
TL;DR: In this article, the impact modeling of a frontal impact attenuator for a specific racing car is investigated based on the application of an explicit nonlinear finite element code, such as LS-DYNA, and on the experimental verification of the results, by means of an appropriately instrumented drop weight test machine.
Abstract: Composite have been increasingly used in cars for their advantages of lightweight, high strength, corrosion resistance and easy manufacturing. Recently, carbon fiber reinforced plastic (CFRP) gains growing popularity in numerous advanced and high performance applications for crashworthiness thanks to its superior impact resistance, respect to metals or other composite materials. Maximising impact protection of carbon fibre reinforced plastic laminated composite structures, predicting and preventing the negative effects of impact on passengers are paramount design criteria for ground vehicles. In this paper the impact modelling of a frontal impact attenuator for a specific racing car will be investigated. The current work is based on the application of an explicit nonlinear finite element code, such as LS-DYNA, and on the experimental verification of the results, by means of an appropriately instrumented drop weight test machine. The thin-walled layered structure was numerically analysed using both shell and solid elements in order to reproduce the laminate as closely as possible, taking into account also the possibility during crushing of an interlaminar failure which plays a significant role during energy absorption mechanism. The proposed models are able to predict, with a good level of accuracy, the deformation process of such impact attenuator when subjected to dynamic loading as those imposed by technical regulation.
1 citations
TL;DR: In this paper, the authors address the composite conica-concave impact attenuators in specific vehicle zones, ensuring kinetic energy absorption, and propose a composite attenuator-based collision avoidance system.
Abstract: Recently crashworthiness trend is the use of thin-walled composite impact attenuators in specific vehicle zones, ensuring kinetic energy absorption. The present paper addresses the composite conica...
1 citations