Abstract
It is well-known that there is coupling between extension and twisting when tensile forces are applied to two-layered angle-ply laminates. The characteristics are due to anisotropy of the laminates. In the present paper the coupling phenomena are analyzed and the direction of twisting is shown to be either plus or minus depending on the material properties and the fiber directions. The fiber directions which give zero twisting under tensile forces are obtained rigorously.
