NONLINEAR PROPERTIES OF POLYMER CELLULAR MATERIALS WITH A NEGATIVE POISSON RATIO
NONLINEAR PROPERTIES OF POLYMER CELLULAR MATERIALS WITH A NEGATIVE POISSON RATIO
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DOI：
10.1007/bf01166005
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发表时间：
1992-09-01
影响因子：
4.5
通讯作者：
LAKES, RS
中科院分区：
文献类型：
--
作者：
CHOI, JB;LAKES, RS
研究了负泊松比聚合物蜂窝固体（可重入泡沫），确定了使泊松比最小的最佳加工工艺。对常规泡沫和再入泡沫均确定了非线性应力-应变关系；它取决于在处理过程中获得的永久体积压缩。在小应变下，可重入泡沫的泊松比随应变的变化有相对的最小值。再入泡沫的韧性随永久体积压缩而增加，因此随密度而增加。
Negative Poisson's ratio polymeric cellular solids (re-entrant foams) were studied to ascertain the optimal processing procedures which give rise to the smallest value of Poisson's ratio. The non-linear stress-strain relationship was determined for both conventional and re-entrant foams; it depended upon the permanent volumetric compression achieved during the processing procedure. Poisson's ratio of re-entrant foam measured as a function of strain was found to have a relative minimum at small strains. The toughness of re-entrant foam increased with permanent volumetric compression, and hence with density.