Experimental Cosserat elasticity in open-cell polymer foam

被引：68
|
作者：
Rueger, Zach [1 ,2 ]
Lakes, Roderic S. [1 ,2 ]
机构：
[1] Univ Wisconsin, Rheol Res Ctr, Dept Engn Phys, Engn Mech Program, Madison, WI 53706 USA
[2] Univ Wisconsin, Rheol Res Ctr, Dept Mat Sci, Madison, WI 53706 USA
来源：
PHILOSOPHICAL MAGAZINE | 2016年 / 96卷 / 02期
基金：
美国国家科学基金会;
关键词：
Cellular structures; microstructure; foams; elasticity; voids; NICKEL FOAMS; SIZE; DEFORMATION; CONTINUUM; SOLIDS; BONE; POLYURETHANE; BEHAVIOR; TORSION; MODEL;
D O I：
10.1080/14786435.2015.1125541
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Reticulated open-cell polymer foams exhibit substantial size effects in torsion and bending: slender specimens are more rigid than anticipated via classical elasticity. Such size effects are predicted by Cosserat (micropolar) elasticity, which allows points to rotate as well as translate and incorporates distributed moments (couple stresses). The Cosserat characteristic length is larger than the cell size. The Cosserat coupling coefficient is larger than in dense closed-cell foams and approaches 1 for foam with 0.4 mm cells.
引用
收藏
页码：93 / 111
页数：19
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