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<p>While traditional or bio-inspired multi-cell structures are widely utilized for crashworthiness applications, this study explores the performance of novel non-closed multi-cell hexagonal columns (NMHCs) with section geometries developed through topology and multi-objective optimizations. Experimental tests, serving as a foundation for validating numerical simulations, were conducted to analyze the behavior of NMHCs under varying loading angles (0°, 10°, and 20°). Four specific configurations (II-NMHC1.4–90-20, II-NMHC1.8–90-20, III-NMHC1-90–20, and III-NMHC1.4–90-20) demonstrated progressive deformation under a 20° oblique impact, with thicker walls preferred for II-NMHC and thinner walls for III-NMHC to achieve optimal performance. Notably, SEA for these four columns decreased by an average of 29% under oblique impact, whereas other configurations experienced a 61.5% reduction compared to axial loading. Cell number, load angle, and section geometry significantly influenced peak load and specific energy absorption, while wall thickness and diameter primarily affected peak load. Optimization results further highlighted optimal performance at a 10° loading angle across all configurations. The III-NMHC outperformed its peers with identical features, achieving the smallest peak load and highest energy absorption.</p>

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Optimization of non-closed multi-cell hexagonal columns generated through topology optimization for enhanced crashworthiness under multiple load angles

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • VanThanh Dang,
  • Michal Rogala,
  • Ameen Topa,
  • PhucThien Nguyen,
  • TrongNhan Tran

摘要

While traditional or bio-inspired multi-cell structures are widely utilized for crashworthiness applications, this study explores the performance of novel non-closed multi-cell hexagonal columns (NMHCs) with section geometries developed through topology and multi-objective optimizations. Experimental tests, serving as a foundation for validating numerical simulations, were conducted to analyze the behavior of NMHCs under varying loading angles (0°, 10°, and 20°). Four specific configurations (II-NMHC1.4–90-20, II-NMHC1.8–90-20, III-NMHC1-90–20, and III-NMHC1.4–90-20) demonstrated progressive deformation under a 20° oblique impact, with thicker walls preferred for II-NMHC and thinner walls for III-NMHC to achieve optimal performance. Notably, SEA for these four columns decreased by an average of 29% under oblique impact, whereas other configurations experienced a 61.5% reduction compared to axial loading. Cell number, load angle, and section geometry significantly influenced peak load and specific energy absorption, while wall thickness and diameter primarily affected peak load. Optimization results further highlighted optimal performance at a 10° loading angle across all configurations. The III-NMHC outperformed its peers with identical features, achieving the smallest peak load and highest energy absorption.