A systematic numerical and experimental study into the mechanical properties of five honeycombs
A systematic numerical and experimental study into the mechanical properties of five honeycombs
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DOI：
10.1016/j.compositesb.2023.110895
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发表时间：
2023-07-21
影响因子：
13.1
通讯作者：
Jowers, Iestyn
中科院分区：
文献类型：
--
作者：
Clarke, Daniel John;Imediegwu, Chikwesiri;Jowers, Iestyn
蜂窝是工程蜂窝材料，与固体材料相比，其通常显示出上级比强度、刚度和能量吸收。因此，它们在工程领域中有许多应用。随着增材制造（AM）技术的发展，随着历史制造限制的解除，对新型蜂窝的研究已经开始。研究一直集中在改善或定制给定的属性，但很少有集中在各向同性，并已做了很少的工作，使不同的模式在相同的制造和实验条件下。在这项研究中，AM已被用来制造名义上相同的蜂窝基于不同的单元电池，在一系列的方向和密度。通过力学性能测试，得到了六边形、三角形、正方形、凹形和双V形蜂窝的弹塑性性能。这些蜂窝的弹性性能已被建模为所有可能的面内加载方向，使用最少的计算资源。介绍了取向和密度的影响，证实了致密蜂窝在杨氏模量、泊松比、屈服强度和抗压强度方面的面内各向同性水平。人们还了解了这些性质如何随相对密度而变化。这些结果提供了一个基础上的比较与未来的工作蜂窝。
Honeycombs are engineered cellular materials that often show superior specific strength, stiffness and energy absorption compared to solid materials. As a consequence they have found numerous applications across engineering fields. The development of additive manufacturing (AM) technologies has initiated an abundance of studies into novel honeycombs as historic manufacturing constraints are lifted. Investigations have been focused on improving or tailoring a given property but very few have focused on isotropy, and little has been done to bring together different patterns under the same manufacturing and experimental conditions. In this study, AM has been used to manufacture nominally identical honeycombs based on differing unit cells, in a range of orientations and densities. Elastic and plastic properties for the hexagon, triangle, square, re-entrant and double-V honeycombs have been obtained through mechanical testing. The elastic properties of these honeycombs have been modelled for all possible in-plane loading directions using minimal computational resources. The effect of orientation and density has been presented, confirming the level of in-plane isotropy for dense honeycombs with regards to Young's modulus, Poisson's ratio, yield strength and compressive strength. Insights have also been gained into how these properties vary with relative density. These results provide a basis for comparison with future work on honeycombs.