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A platform for research: civil engineering, architecture and urbanism
Energy absorption and topology optimization of self-similar inspired multi-cell square tubes
Highlights The local self-similar and global self-similar layout strategies provide an effective method for designing multi-cell tubes. Filling self-similar structures in the corners can be extended to design other multi-cell tubes. The crashworthiness of multi-cell tubes can be optimized by changing the layout of internal ribs. A simplified theoretical model is used to predict the mean crushing force of the multi-cell tubes.
Abstract Due to their low cost and lightweight properties, multi-cell square tubes have been widely used in impact protection as energy absorbers. In this study, two kinds of multi-cell square tubes were constructed according to the local self-similar and global self-similar layout strategies. The experiments and numerical simulations were conducted to investigate their quasi-static compression deformation and energy absorption. The results demonstrated that self-similar layout strategies can significantly enhance the crashworthiness of multi-cell square tubes, and the global self-similar layout appears to be more effective at energy absorption. A simplified theoretical model for the mean crushing force () was developed for its constituent elements of the proposed square tubes. Furthermore, the COPRAS method and the non-dominated sorting genetic algorithm II (NSGA-II) were employed for optimal structure selection and multi-objective optimization. The results showed that the 2nd-order global self-similar multi-cell square tube (MSTG1-2) had prominent crashworthiness compared with some typical self-similar square tubes. The current optimization and topology design strategies can be used in other polygonal multi-cell tubes, which provides an effective guide for enhancing the crashworthiness of these multi-cell tubes.
Energy absorption and topology optimization of self-similar inspired multi-cell square tubes
Highlights The local self-similar and global self-similar layout strategies provide an effective method for designing multi-cell tubes. Filling self-similar structures in the corners can be extended to design other multi-cell tubes. The crashworthiness of multi-cell tubes can be optimized by changing the layout of internal ribs. A simplified theoretical model is used to predict the mean crushing force of the multi-cell tubes.
Abstract Due to their low cost and lightweight properties, multi-cell square tubes have been widely used in impact protection as energy absorbers. In this study, two kinds of multi-cell square tubes were constructed according to the local self-similar and global self-similar layout strategies. The experiments and numerical simulations were conducted to investigate their quasi-static compression deformation and energy absorption. The results demonstrated that self-similar layout strategies can significantly enhance the crashworthiness of multi-cell square tubes, and the global self-similar layout appears to be more effective at energy absorption. A simplified theoretical model for the mean crushing force () was developed for its constituent elements of the proposed square tubes. Furthermore, the COPRAS method and the non-dominated sorting genetic algorithm II (NSGA-II) were employed for optimal structure selection and multi-objective optimization. The results showed that the 2nd-order global self-similar multi-cell square tube (MSTG1-2) had prominent crashworthiness compared with some typical self-similar square tubes. The current optimization and topology design strategies can be used in other polygonal multi-cell tubes, which provides an effective guide for enhancing the crashworthiness of these multi-cell tubes.
Energy absorption and topology optimization of self-similar inspired multi-cell square tubes
Sun, Jiapeng (author) / He, Yulong (author) / Zhang, Xiujuan (author) / Li, Xin (author) / Lu, Minghui (author) / Chen, Yanfeng (author)
Thin-Walled Structures ; 196
2023-12-13
Article (Journal)
Electronic Resource
English
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