In section 2.1, the formulation is started with polar coordinates (axial, circumferential and
radial) and these directions are clearly defined in Fig.1. However, in Eq.(3) and in the
paragraph just after Eq.(3), authors introduced directions 1 as direction along fiber, and
direction 2 as direction perpendicular to the fiber. The word “fiber” is first mentioned after
Eq.(3) and associated directions are not described at all. The authors must clarify this as
well as the assumptions made about the material properties concerning isotropy. 返回小木虫查看更多