Cosserat elastic lattices
Cosserat elastic lattices
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Cosserat 弹性晶格
DOI：
10.1007/s11012-019-00968-7
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发表时间：
2019
期刊：
影响因子：
2.7
通讯作者：
R. Lakes
中科院分区：
文献类型：
--
作者：
Z. Rueger;C. Ha;R. Lakes
摘要设计了由立方和三角形棱柱单元电池与聚合物Sarrus连接肋元件组成的晶格，通过3D打印制造并进行了实验研究。
实验上观察到这些晶格的尺寸效应;
细长试样在扭转和弯曲时比通过经典弹性所预期的更刚性。通过Cosserat弹性分析效果。尺寸效应的大小对晶格的几何形状敏感;具有短肋的三角形细胞显示出最极端的效应，也是与细胞尺寸有关的最大特征长度。扭转耦合数是1，它的上限，对所有的晶格。
实现任意大的非经典效应的路径划定。
AbstractLattices composed of cubic and triangular prismatic unit cells with polymeric Sarrus linkage rib elements are designed, fabricated via 3D printing and studied experimentally.
Size effects in these lattices are observed experimentally;
slender specimens appear more rigid in torsion and in bending than expected via classical elasticity. Effects are analyzed via Cosserat elasticity. The magnitude of size effects is sensitive to geometry of the lattices; triangular cells with short ribs revealed the most extreme effects, also the largest characteristic length in relation to cell size. The torsion coupling number is 1, its upper bound, for all lattices.
A path to the attainment of arbitrarily large nonclassical effects is delineated.