Lees C, Vincent J F, Hillerton J E
Department of Zoology, The University, Whiteknights, Reading, Berks.
Biomed Mater Eng. 1991;1(1):19-23.
Poisson's ratio of cow teat skin was measured uni- and biaxially and shown to be anisotropic and dependent on aspect ratio. At strains below 0.1 (where Cauchy and Hencky strain are indistinguishable) the Poisson's ratio of cow teat skin measured biaxially is very much greater than 1.0, whereas the Poisson's ratio of distending artery is between 0.5 and 0.3. Knitted fabric behaves similarly to cow teat skin in that it can give a negative Poisson's ratio at low strains. Skin is therefore probably to be considered mechanically as an open feltwork of fibres rather than some sort of continuum.
对奶牛乳头皮肤的泊松比进行了单轴和双轴测量，结果表明其具有各向异性且取决于纵横比。在应变低于0.1时（此时柯西应变和亨基应变难以区分），双轴测量的奶牛乳头皮肤泊松比远大于1.0，而扩张动脉的泊松比在0.5至0.3之间。针织织物的行为与奶牛乳头皮肤类似，即在低应变下可呈现负泊松比。因此，从力学角度来看，皮肤可能应被视为纤维的开放毡结构，而非某种连续体。
