Bionic design of bend-twist coupled thin-walled beam based on the structure of rice stem
Bionic design of bend-twist coupled thin-walled beam based on the structure of rice stem
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DOI：
10.1080/15376494.2021.1950244
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发表时间：
2021-07
影响因子：
2.8
通讯作者：
Jiale Huang;Xiaolin Deng;Wangyu Liu
中科院分区：
文献类型：
--
作者：
Jiale Huang;Xiaolin Deng;Wangyu Liu
摘要 基于稻秆结构，设计了仿生弯扭耦合薄壁梁。由于纵向加强肋之间的薄弱环节，仿生弯扭耦合梁可以保持其纵向刚度，同时减少其扭转约束。它可以使梁避免由于附加的小光纤角度层的扭转约束而导致弯扭耦合比的降低。采用多目标优化来提高仿生梁的力学性能。结果表明，优化后梯度仿生梁的力学性能在各方面均高于原梁。
Abstract A bionic bend-twist coupled thin-walled beam was designed based on the structure of rice stem. Due to the weak link among the longitudinal strengthening ribs, the bionic bend-twist coupled beam can maintain its longitudinal stiffness while decreasing its torsional constraint. It could make the beam avoid the decrease of bend-twist coupled ratio due to the torsional constraint from the additional small fiber angle layer. Multi-objective optimization was used to improve the mechanical performances of the bionic beam. Results show that after optimization, the mechanical performances of gradient bionic beam are higher than those of the original beam in all aspects.