Volume 37 Issue 4
Sep 2023
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NIU Lingeng, YAN Dong, WANG Genwei, SONG Hui, GUO Meiqing. Quasi-Static Axial Energy Absorption Characteristics and Optimization of Sunflower-Like Sandwich Cylindrical Shells[J]. Chinese Journal of High Pressure Physics, 2023, 37(4): 044206. doi: 10.11858/gywlxb.20230637
Citation: NIU Lingeng, YAN Dong, WANG Genwei, SONG Hui, GUO Meiqing. Quasi-Static Axial Energy Absorption Characteristics and Optimization of Sunflower-Like Sandwich Cylindrical Shells[J]. Chinese Journal of High Pressure Physics, 2023, 37(4): 044206. doi: 10.11858/gywlxb.20230637

Quasi-Static Axial Energy Absorption Characteristics and Optimization of Sunflower-Like Sandwich Cylindrical Shells

doi: 10.11858/gywlxb.20230637
  • Received Date: 06 Apr 2023
  • Rev Recd Date: 17 Apr 2023
  • Accepted Date: 24 Apr 2023
  • Issue Publish Date: 01 Sep 2023
  • Experiments, theoretical analysis, and numerical simulations were conducted to investigate the energy absorption characteristics of sunflower-like sandwich cylindrical shells under quasi-static axial loading. Firstly, quasi-static axial compression experiments and numerical simulations were conducted for sandwich cylindrical shells with three inner diameters and for their components. It was found that the specific energy absorptions and crushing force efficiencies of all sandwich cylindrical shells are greater than those of their individual components, and those of the sums of the individual components. The combination of cylindrical shell and corrugated core shell can effectively improve the energy absorption efficiency of thin-walled metal structure. Then, the theoretical formula of the axial average crushing force for the sandwich cylindrical shell was derived based on the simplified super folding element theory. The axial average crushing force predicted by the theoretical model was compared with the experimental and simulation results. It was found that the errors are within 10%. Finally, a multi-objective optimization design, with the objectives of maximum specific energy absorption and minimum peak crushing force for the sunflower-like sandwich cylindrical shell, was carried out. The Pareto front of specific energy absorption and peak crushing force of the sandwich cylindrical shell was obtained. The optimized sandwich cylindrical shell structure was improved in terms of specific energy absorption, average crushing force, and mass.

     

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