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Analysis of bending and buckling of pre-twisted beams:A bioinspired study 被引量:6
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作者 Zi-Long Zhao Hong-Ping Zhao +1 位作者 Zheng Chang Xi-Qiao Feng 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2014年第4期507-515,共9页
Twisting chirality is widely observed in artificial and natural materials and structures at different length scales. In this paper, we theoretically investigate the effect of twisting chiral morphology on the mechanic... Twisting chirality is widely observed in artificial and natural materials and structures at different length scales. In this paper, we theoretically investigate the effect of twisting chiral morphology on the mechanical properties of elas- tic beams by using the Timoshenko beam model. Particular attention is paid to the transverse bending and axial buckling of a pre-twisted rectangular beam. The analytical solution is first derived for the deflection of a clamped-free beam under a uniformly or periodically distributed transverse force. The critical buckling condition of the beam subjected to its self- weight and an axial compressive force is further solved. The results show that the twisting morphology can significantly improve the resistance of beams to both transverse bending and axial buckling. This study helps understand some phenomena associated with twisting chirality in nature and provides inspirations for the design of novel devices and structures. 展开更多
关键词 twisting chirality. timoshenko beam. bending.euler buckling · bionics
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