Author
Simonetta Boria
Other affiliations: University of Pisa
Bio: Simonetta Boria is an academic researcher from University of Camerino. The author has contributed to research in topics: Impact attenuator & Crashworthiness. The author has an hindex of 14, co-authored 53 publications receiving 749 citations. Previous affiliations of Simonetta Boria include University of Pisa.
Papers
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TL;DR: In this article, the authors present the steps to follow in order to design specific lightweight impact attenuators, based on a detailed analytical, experimental and numerical analysis of the structural crashworthiness.
226 citations
TL;DR: In this paper, a composite impact attenuator for a Formula SAE racing car is presented, which is manufactured by lamination of prepreg sheets in carbon fibres and epoxy matrix, and has a very similar geometry to a square frusta.
Abstract: The present paper deals with the lightweight design and the crashworthiness analysis of a composite impact attenuator for a Formula SAE racing car, in order to pass homologation requirements. The analysed impact attenuator is manufactured by lamination of prepreg sheets in carbon fibres and epoxy matrix, particularly used for sporting applications, and has a very similar geometry to a square frusta, so as to obtain a progressive and controlled deformation. During the design, attention was focused on the material distribution and gradual smoothing, but also on the lamination process, which can heavily affect the energy absorption capability. To reduce the development and testing costs of a new safety design, computational crash simulations for early evaluation of safety behaviour under vehicle impact test were carried out. The dynamic analysis was therefore conducted both numerically, using an explicit finite element code such as LS-DYNA, and experimentally, by means of an appropriately instrumented drop weight test machine, in order to validate the model in terms of deceleration values during crushing. To assess the quality of the simulation results, a comparative analysis was initially developed on simple CFRP composite tubes subjected to dynamic axial loading. The numerical analysis was conducted using both shell and solid elements, in order to reproduce not only the brittleness of the composite structure but also the effective delamination phenomenon. Both the analyses show a good capacity to reproduce the crushing process; this is confirmed by the fact that model estimated displacements and accelerations are in close agreement with observed values for these variables. This confirms the quality of the methodology and approach used for the design of a racing car impact attenuator.
70 citations
TL;DR: In this paper, the authors studied the energy absorption capability of fiber preconditioned cones made of composite materials, intended for structural applications in the automotive industry, from the point of view of their energy absorbing capability when submitted to axial loading.
70 citations
TL;DR: In this paper, the authors present the results of an experimental campaign made on a fully thermoplastic composite, where both the reinforcement and the matrix are made in polypropylene, and analyze its behavior under different impact loading conditions using a drop weight testing machine.
69 citations
TL;DR: Compared to the state-of-the-art Covariance Matrix Adaptation Evolution Strategy (CMA-ES), the KG-LSM optimization algorithm demonstrates to be efficient in terms of convergence speed and performance of the optimized designs.
59 citations
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TL;DR: In this article, the authors present the steps to follow in order to design specific lightweight impact attenuators, based on a detailed analytical, experimental and numerical analysis of the structural crashworthiness.
226 citations
TL;DR: In this article, the effect of different factors on LVI performance of FRC, identify the gap in the literature and suggest directions for future work in this area, in addition to different damage modeling strategies used to predict the impact resistance and damage tolerance.
194 citations
TL;DR: In this article, the authors compared the crashworthiness of empty circular CFRP (Carbon Fiber Reinforced Plastics) with CFRP/aluminum/steel tubes filled with aluminum foam or aluminum honeycomb under axial quasi-static crushing.
173 citations
TL;DR: In this article, a multiscale approach for predicting three-dimensional elastic model of carbon twill weave fabric composite which will be applied to crashworthiness analysis of body structure of electric vehicle was developed.
166 citations
TL;DR: In this article, a hybrid glass/carbon composite bumper beam was designed and manufactured via the design optimization process combined with the impact analysis, which had 33% less weight compared to the conventional GMT bumper beam while having the improved impact performances.
127 citations