Comparison of buckling loads of hyperboloidal and cylindrical lattice structures
Comparison of buckling loads of hyperboloidal and cylindrical lattice structures
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DOI：
10.1016/j.compstruct.2018.09.052
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发表时间：
2019-01-01
影响因子：
6.3
通讯作者：
Yokozeki, Tomohiro
中科院分区：
文献类型：
--
作者：
Shitanaka, Atsushi;Aoki, Takahira;Yokozeki, Tomohiro
圆柱晶格结构是一种轻量化结构，可以利用纤维增强复合材料的正交异性。屈曲载荷的最大化是重要的，因为它们支配着结构的强度。在双曲面形状偏差增大圆柱均匀壳屈曲载荷的基础上，讨论了双曲面形状偏差对圆柱晶格结构屈曲载荷的影响。此外，采用有限元方法计算了传统圆柱晶格结构和形状偏差双曲面晶格结构的压缩、弯曲和扭转屈曲载荷。结果表明，形状偏差降低了屈曲载荷，而质量变化可以忽略不计。形状偏差对均匀壳结构和晶格结构屈曲载荷的影响是不同的。
Cylindrical lattice structures are types of lightweight structures and can utilize the orthotropy of fiber-reinforced composite materials. Maximization of the buckling loads is important because they dominate the strength of the structures. On the basis of the fact that a hyperboloidal shape deviation increases the buckling loads of cylindrical homogeneous shells, the changes in the buckling loads of cylindrical lattice structures with a hyperboloidal shape deviation are discussed. Further, the buckling loads of both conventional cylindrical lattice structures and shape-deviated hyperboloidal lattice structures with respect to the compressive, bending, and torsional loads are calculated using a finite element method. The results show that the shape deviation decreases the buckling loads, while the change in mass is negligible. The effects of the shape deviation on the buckling loads differ between homogeneous shell structures and lattice structures.