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Thermomechanical Analysis of a Bio‐Inspired Lightweight Multifunctional Structure
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-08-05 , DOI: 10.1002/adem.202000371 Eurydice Kanimba 1 , Ting Yang 1 , Scott T. Huxtable 1 , Ling Li 1 , Zhiting Tian 2
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-08-05 , DOI: 10.1002/adem.202000371 Eurydice Kanimba 1 , Ting Yang 1 , Scott T. Huxtable 1 , Ling Li 1 , Zhiting Tian 2
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This work investigates the thermal and mechanical performance of a bio‐inspired lightweight structure, which is inspired by the porous (up to 93% porosity) internal skeleton of cuttlefish, also known as cuttlebone. The potential of using this structure as an air‐cooled heat sink for electronic devices and an integrated thermal protection system (ITPS) is tested and systematically compared with three conventional structures based on wavy, pyramid, and cylindrical pin fin geometries. When cooling a hot spot (100 × 100 × 2 mm3) subjected to heat flow (250 W), and given the same solid volume fraction, the wavy and cuttlebone structures reduce the maximum temperature to 57 °C, which is 13 and 19 °C lower than for the pin fins and pyramid structures, respectively. Concerning the ITPS application, the cuttlebone exhibits the most isometric deformation with a 0.062 mm maximum standard deviation among its four corners. Moreover, the cuttlebone outperforms the other structures in terms of compressive strength (20%, 17%, and 219% increase compared with the wavy, pyramid, and pin fin structures, respectively). More importantly, the simulations indicate that the cuttlebone structure undergoes a graceful failure process due to the sequential buckling of the vertical walls compared with other structures.
中文翻译：
生物启发的轻型多功能结构的热力学分析
这项工作研究了受生物启发的轻质结构的热性能和机械性能，该结构的灵感来自墨鱼（也称为墨鱼骨）的多孔（孔隙率高达93％）内部骨架。测试了将该结构用作电子设备的风冷散热器和集成热保护系统（ITPS）的潜力，并与基于波浪形，金字塔形和圆柱状针翅几何形状的三种常规结构进行了系统比较。冷却热点时（100×100×2 mm 3）受到热流（250 W）的作用，并且在相同的固体体积分数的情况下，波浪形和cut骨结构将最高温度降低到57°C，分别比针状鳍和金字塔形结构低13和19°C 。关于ITPS应用，乌贼骨的等角变形最大，四个角之间的最大标准偏差为0.062 mm。此外，就抗压强度而言，the骨的性能优于其他结构（与波浪形，金字塔形和针状翅片结构相比，分别增加了20％，17％和219％）。更重要的是，模拟表明，与其他结构相比，由于垂直壁的连续屈曲，使cut骨结构经历了平稳的破坏过程。
更新日期：2020-08-05
中文翻译：
生物启发的轻型多功能结构的热力学分析
这项工作研究了受生物启发的轻质结构的热性能和机械性能，该结构的灵感来自墨鱼（也称为墨鱼骨）的多孔（孔隙率高达93％）内部骨架。测试了将该结构用作电子设备的风冷散热器和集成热保护系统（ITPS）的潜力，并与基于波浪形，金字塔形和圆柱状针翅几何形状的三种常规结构进行了系统比较。冷却热点时（100×100×2 mm 3）受到热流（250 W）的作用，并且在相同的固体体积分数的情况下，波浪形和cut骨结构将最高温度降低到57°C，分别比针状鳍和金字塔形结构低13和19°C 。关于ITPS应用，乌贼骨的等角变形最大，四个角之间的最大标准偏差为0.062 mm。此外，就抗压强度而言，the骨的性能优于其他结构（与波浪形，金字塔形和针状翅片结构相比，分别增加了20％，17％和219％）。更重要的是，模拟表明，与其他结构相比，由于垂直壁的连续屈曲，使cut骨结构经历了平稳的破坏过程。
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