In the biaxial tensile tests performed on BIAX Z020 Zwick system
equipped also with video extensometer (see Fig. 4), the cross
shaped specimens have been applied. The arm width has been
100 mm, therefore on testing area of 100 mm 100 mm the gage
length of about 50 mm in both direction has been indicated, see
Fig. 5. In all tests initial grips separation of 300 mm has been selected.
The overall dimensions of the specimen cutting form bath
of fabric have been 400 mm 400 mm. The specimens have been subjected to tension (constant force rate) in the direction of the
warp and weft threads with different force ratios.