Cosserat elastic lattices
| Autor: | Roderic S. Lakes, Zach Rueger, Chan Soo Ha |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Characteristic length Mechanical Engineering Mathematical analysis Torsion (mechanics) Metamaterial 02 engineering and technology Condensed Matter Physics 01 natural sciences Upper and lower bounds food.food Arbitrarily large 020303 mechanical engineering & transports food 0203 mechanical engineering Mechanics of Materials 0103 physical sciences Sarrus linkage Elasticity (economics) 010301 acoustics Short ribs |
| Zdroj: | Meccanica. 54:1983-1999 |
| ISSN: | 1572-9648 0025-6455 |
| DOI: | 10.1007/s11012-019-00968-7 |
| Popis: | Lattices 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. |
| Databáze: | OpenAIRE |
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