Experimental Cosserat elasticity in open-cell polymer foam
Experimental Cosserat elasticity in open-cell polymer foam
复制标题
开孔聚合物泡沫中的实验 Cosserat 弹性
DOI：
10.1080/14786435.2015.1125541
复制
发表时间：
2016
影响因子：
1.6
通讯作者：
R. Lakes
中科院分区：
文献类型：
--
作者：
Z. Rueger;R. Lakes
网状开孔聚合物泡沫在扭转和弯曲方面表现出显着的尺寸效应：细长的样品比经典弹性预期的更坚硬。这种尺寸效应是由 Cosserat（微极）弹性预测的，它允许点旋转和平移并结合分布力矩（力偶应力）。 Cosserat 特征长度大于单元尺寸。 Cosserat 耦合系数大于致密闭孔泡沫，对于 0.4 毫米泡孔的泡沫接近 1。
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.