Scholarlink

<p>To address the potential small-angle oblique loading conditions that thin-walled structures may encounter as energy absorbers in automotive applications, a novel bio-inspired thin-walled bi-tubular (BTB) tube structure inspired by bivalve shells was proposed in this study. The reliability of the finite element (FE) model for the multi-cell bi-tubular (MB) tube was first validated, followed by a systematic investigation via numerical simulations to evaluate the effects of the number of branches (N) and cutting angles (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\alpha\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>) on the crashworthiness characteristics under axial compression. The results demonstrate that the specific energy absorption (SEA) generally increases with a decreasing cutting angle and an increasing number of branches, except for the BTBA3N6. Specifically, the SEA values of BTBA3N6 and BTBA2N10 are 12.6–15.7% higher than those of the conventional MBN6 and MBN10, respectively. Furthermore, while BTBA3N6 shows a slightly lower SEA improvement compared to BTBA2N10 under small-angle oblique loading, it exhibits a larger critical angle for deformation mode transition. A theoretical model based on the simplified super-folding element (SSFE) theory was established to predict the mean crushing force (MCF) of the proposed BTB tubes under both axial and oblique loading. The theoretical predictions showed excellent agreement with the numerical results.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Crashworthiness analysis of thin-walled tube inspired by bivalve shell under axial and oblique compression

  • 期刊论文

  • 发表日期：

    2026年3月26日

查看全文
  • Yifan Xiang,
  • Hongyuan Yang,
  • Yiru Ren

摘要

To address the potential small-angle oblique loading conditions that thin-walled structures may encounter as energy absorbers in automotive applications, a novel bio-inspired thin-walled bi-tubular (BTB) tube structure inspired by bivalve shells was proposed in this study. The reliability of the finite element (FE) model for the multi-cell bi-tubular (MB) tube was first validated, followed by a systematic investigation via numerical simulations to evaluate the effects of the number of branches (N) and cutting angles ( \(\alpha\) α ) on the crashworthiness characteristics under axial compression. The results demonstrate that the specific energy absorption (SEA) generally increases with a decreasing cutting angle and an increasing number of branches, except for the BTBA3N6. Specifically, the SEA values of BTBA3N6 and BTBA2N10 are 12.6–15.7% higher than those of the conventional MBN6 and MBN10, respectively. Furthermore, while BTBA3N6 shows a slightly lower SEA improvement compared to BTBA2N10 under small-angle oblique loading, it exhibits a larger critical angle for deformation mode transition. A theoretical model based on the simplified super-folding element (SSFE) theory was established to predict the mean crushing force (MCF) of the proposed BTB tubes under both axial and oblique loading. The theoretical predictions showed excellent agreement with the numerical results.