Elastic Anisotropy in Flexible Polyurethane Foam
1993 年 49 巻 8 号 p. 404-407
詳細
1993 年 49 巻 8 号 p. 404-407
The anisotropic elasticity of some flexible foamed materials of polyurethane was investigated by experiment. The data of compression and shearing in various directions suggest that the tested materials are transversely isotropic around the principal direction, i.e., the direction in which the constituent foams of elongated shapes are oriented on the average. Based on this and another empirical symmetry, a formula was derived, by which the compression modulus in any direction can be estimated from the compression moduli in two axes, the principal one and any normal to it.
