In the beginning, the influence of specimens’ shape on the
strain–stress curve and the value of Ultimate Tensile Strength
(UTS) have been examined. Two types of specimens called A and
B have been chosen and tested in biaxial test stand in 1:1 load ratio.
The type A (Fig. 4) is typical cross shaped specimen, while in
the type B arm of the cross have been cut into five stripes to avoid
influence of transverse deformation (Fig. 6). The character of the
strain–stress curves (see Fig. 7) and the value of UTS for warp
(UTSwarp) and weft (UTSweft), (see Table 2) for the A and B types
of specimens are almost the same. It can be concluded that for
the investigated type of textile fabric, the influence of the transverse
deformation of specimen’s arms is negligible. Basing on those
results, the A type specimen has been selected for further tests. Results
obtained from biaxial tensile tests for 1:1 load ratio are given
in Fig. 8 (specimen A type)