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This paper examines the energy absorption (EA) capacity of thin-walled multi-corner double-hat double-wall (MCDHDW) columns subjected to quasi-static axial impact loading via finite element method (FEM) and experiment. The MCDHDW tubes consist of two mild-steel hats spot-welded together to enhance the specific energy absorption (SEA), the average crush load (MCF), and the load efficiency (CFE) simultaneously during axial collisions. The FEM outcomes indicate that the spacing of spot-welds in MCDHDW crucially affected the crushing characteristics. Specifically, the MCF and SEA values for MCDHDW with 20 mm weld spacing (MCDHDW_20) were superior, outperforming those with 10 mm, 15 mm, and 30 mm spacings. Relative to multi-corner double-hat single-wall (MCDHSW) models of equivalent mass and loading scenarios, MCDHDW also showed enhanced metrics, including a 12.3% improvement in EA, MCF, and 12.5% increase in SEA. Moreover, tubes under elevated impact velocity displayed improved SEA and CFE compared to lower-impact velocity. Lastly, two experiments validated the collapse patterns and performance indicators of MCDHDW, aligning closely with FEM predictions for both MCDHDW and MCDHSW tubes.

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Experimental and Numerical Investigation on Quasi-Static Axial Crushing of Thin Double-Walled Multi-corner Double-Hat Columns

  • 会议论文

  • 发表日期：

    2026年

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  • Bao-Tang Gia,
  • Thai-Tran Quoc,
  • Hai Tran

摘要

This paper examines the energy absorption (EA) capacity of thin-walled multi-corner double-hat double-wall (MCDHDW) columns subjected to quasi-static axial impact loading via finite element method (FEM) and experiment. The MCDHDW tubes consist of two mild-steel hats spot-welded together to enhance the specific energy absorption (SEA), the average crush load (MCF), and the load efficiency (CFE) simultaneously during axial collisions. The FEM outcomes indicate that the spacing of spot-welds in MCDHDW crucially affected the crushing characteristics. Specifically, the MCF and SEA values for MCDHDW with 20 mm weld spacing (MCDHDW_20) were superior, outperforming those with 10 mm, 15 mm, and 30 mm spacings. Relative to multi-corner double-hat single-wall (MCDHSW) models of equivalent mass and loading scenarios, MCDHDW also showed enhanced metrics, including a 12.3% improvement in EA, MCF, and 12.5% increase in SEA. Moreover, tubes under elevated impact velocity displayed improved SEA and CFE compared to lower-impact velocity. Lastly, two experiments validated the collapse patterns and performance indicators of MCDHDW, aligning closely with FEM predictions for both MCDHDW and MCDHSW tubes.