Abstract

It is of great essence to unveil relationship between structure, mechanical properties, and application of bionic design. Targeting at alleviating the debonding failure issue in the internal structures of the wind turbine blade, the reversed-semi-reentrant (RSRE) honeycomb and the angular gradient (AG) honeycomb with zero Poisson’s ratio are considered in the design of the spar/shear web structure. Through finite element methods, the mechanical behaviors of these two types of honeycombs were compared to that of the hexagonal honeycomb. The ability of the RSRE honeycomb to reduce the shear stress on the skin–core interface is proved. The AG honeycomb also proves to have advantages in improving the shear stress distribution inside the honeycomb. Then, the RSRE honeycomb and the AG honeycomb are assembled together to build a complete model of spar/shear web structure. The results of simulations of the whole model under different loading conditions show that these two honeycombs have effectively promoted the mechanical behaviors of the whole model.

摘要

揭示仿生设计的结构、力学性能和应用之间的关系具有重要意义。针对缓解风电叶片内部结构脱粘失效问题，在翼梁/抗剪腹板设计中考虑了反向半凹入（RSRE）蜂窝和零泊松比角梯度（AG）蜂窝。结构体。通过有限元方法，将这两种蜂窝的力学行为与六角蜂窝的力学行为进行了比较。证明了 RSRE 蜂窝体降低皮芯界面剪切应力的能力。AG蜂窝还被证明在改善蜂窝内部的剪切应力分布方面具有优势。然后，RSRE蜂窝和AG蜂窝组装在一起，构建了一个完整的梁/剪切腹板结构模型。整个模型在不同加载条件下的仿真结果表明，这两种蜂窝有效地促进了整个模型的力学行为。