PDF(Pubmed)
Abstract：
This study presents a thorough numerical evaluation of the crashworthiness properties of a new bio-inspired DNA tubes (BIDNATs) with circular, elliptical, and rectangular cross-sections. Deformation and crashworthiness behaviors are evaluated using axial quasi-static crushing simulations by ABAQUS/Explicit (Abaqus 6.14, https://www.3ds.com/products-services/simulia/products/abaqus/ ). The study compares the performance of conventional tubes with rectangular and elliptical cross-sections to DNA-inspired tubes. Increasing the rotation angle leads to more helices and a pronounced helix angle, resulting in lower initial peak force (IPF). However, lower cross-section aspect ratios generally have higher IPF and specific energy absorption (SEA) values. BIDNATs with rectangular cross-sections and a 540° rotation angle have the lowest SEA and IPF values across all aspect ratios. Notably, for the 110/100 aspect ratio, the SEA of E110/100 is 71% higher than the conventional tube. Overall, BIDNATs with elliptical cross-sections and a 360° rotation angle exhibit higher SEA values and lower IPF values, particularly for a width (W) of 100 mm. Conventional circular and elliptical tubes generally have SEA values exceeding 6 J/g, with only E110/100 surpassing this among DNA-inspired tubes. The NE110/100 tube has the highest SEA, surpassing E110/100 by 54%, while its IPF is 10% greater than DNA-inspired E110/100. It\'s worth noting that conventional circular and elliptical tubes have higher IPF values compared to their DNA-inspired counterparts. These findings offer valuable insights for engineers and researchers in the design of crash tubes to improve overall vehicle safety for both occupants and pedestrians.
摘要：
这项研究提出了一种新的生物启发DNA管（BIDNAT）与圆形的耐撞性的全面的数值评估，椭圆,和矩形横截面。ABAQUS/Explicit(Abaqus6.14,https://www.3ds.com/products-services/simulia/products/abaqus/)使用轴向准静态破碎模拟对变形和耐撞性行为进行评估。该研究比较了具有矩形和椭圆形横截面的常规管与DNA启发管的性能。增加旋转角度会导致更多的螺旋和明显的螺旋角，导致较低的初始峰值力（IPF）。然而,较低的横截面长宽比通常具有较高的IPF和比能量吸收(SEA)值。具有矩形横截面和540°旋转角度的BIDNAT在所有纵横比中具有最低的SEA和IPF值。值得注意的是,对于110/100的纵横比，E110/100的SEA比常规管高71%。总的来说,具有椭圆形横截面和360°旋转角度的BIDNAT表现出较高的SEA值和较低的IPF值，特别是对于100毫米的宽度（W）。传统的圆形和椭圆形管的SEA值通常超过6J/g，只有E110/100在受DNA启发的试管中超过了这个水平。NE110/100管具有最高的SEA，超过E110/10054%，而其IPF比DNA启发的E110/100大10%。值得注意的是，传统的圆形和椭圆形管与受DNA启发的对应物相比具有更高的IPF值。这些发现为工程师和研究人员在设计碰撞管方面提供了宝贵的见解，以提高乘员和行人的整体车辆安全性。
