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- W2145758857 abstract "Thin-wall columns or tubular beams play an important role on passenger safety in frontal and real collisions by absorbing crushing energy of a vehicle. A tubular beam with a large specific energy (the ratio of energy absorption to mass) and a large crushing force is the most desirable for its better safety performance and less weight. Due to the complexity of crash, obtaining such designs has been a challenge to the trial-and-error approach using physical experiments. To this end, finite element simulation combined with optimization methodologies has provided a viable means to meet the challenge. In this study, the singlecell hexagonal columns filled with aluminum foams are optimized for crashworthiness (maximum specific energy absorption) with respect to section geometries, tube thickness, and foam densities. Existing literature shows that the interaction between aluminum foam and a tube structure causes the combined structure to have more energy absorption than that if both are separated. It was also observed from experiments that the stress-strain behaviors of aluminum foams depend on their densities. To this end, the best tube design is obtained by simultaneously designing the tube structure and selecting foam densities. The optimization work is performed using the object-oriented optimization framework HiPPO, with the aid of metamodeling and finite element crash simulations." @default.
- W2145758857 created "2016-06-24" @default.
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- W2145758857 date "2008-04-07" @default.
- W2145758857 modified "2023-09-25" @default.
- W2145758857 title "Crashworthiness Optimization of Foam-Filled Thin-Walled Structures" @default.
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- W2145758857 doi "https://doi.org/10.2514/6.2008-2061" @default.
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