Torsion of oriented polymer sheets

Torsion of oriented polymer sheets was undertaken by Raumann [14] to determine the shear compliances S44 and See for uniaxially oriented (transversely isotropic) low-density polyethylene. Torsion of oriented sheets can also be used to determine the shear compliances S44, 555 and See for sheets possessing orthorhombic symmetry. As this situation is more... [Pg.178]

In practice, the torsion of oriented polymer sheets is complicated by several effects that cause an apparent increase in the stiffness of the sample [18]. [Pg.179]

In view of the complications arising in the torsion of oriented polymer sheets due to the effects of axial stress and end effects associated with the grips, there is considerable incentive to determine the shear compliances S44 and see by simple shear. Figure 8.10 shows a diagram of an apparatus designed by Lewis, Richardson and Ward [21]. Identical... [Pg.179]

Big Chemical Encyclopedia