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- W2909253265 abstract "Nowadays, thin-walled structures are one of the best absorption systems due to their lightness, high absorption capacity, low space, high energy absorption to weight ratio, availability and cost-effectiveness, so study on these energy absorption systems and also their optimization are very interesting issues for the researchers of impact mechanics. In this research, crashwortiness of thin-walled structures filled with polyurethane foam with five cross sections of square, hexagon, octagon, decagon and circle under axial and oblique dynamic loads is studied. These structures consist of two inner and outer tubes connected together by several reinforcing plates. It should be noted that the ratio of inner tube to the outer is considered 0, 0.25, 0.5, 0.75, and 1. Foam is of great importance because of having higher strength, lightness and high energy absorption in design of the energy absorbers. In this research, the structures are filled in two different ways. In the first case, the foam is injected only between the inner and outer tubes, and in the second case, the entire structure is filled with foam. First step of this research was to verify the results of simulations performed in LS-DYNA software, which is done by comparing these results with the experimental ones. The second step of this study was to calculate the crashworthiness indicators including specific energy absorption (SEA), maximum collapse force (Fmax) and crush force efficiency (CFE) for the structures studied in this research. Next, the best cross-section and ratio of the inner tube to the outer one is determined using TOPSIS ranking method. Decagonal cross section with the inner tube to the outer one ratio of 0.5 showed the best crashworthiness capacity for the both structures mentioned above. Then, both of these structures were again compared together using TOPSIS method, and finally the structure fully filled with foam was found to have the highest energy absorption capacity." @default.
- W2909253265 created "2019-01-25" @default.
- W2909253265 creator A5034564913 @default.
- W2909253265 date "2017-01-01" @default.
- W2909253265 modified "2023-09-24" @default.
- W2909253265 title "Study on the Crushing Behavior of Double-Walled Structures Filled whith Foam under Axial and Oblique Dynamic Loading" @default.
- W2909253265 hasPublicationYear "2017" @default.
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