|
Abstract:
|
Woven geotextiles are used in such applications as embankments, foundations
and water lays. The use of geotextiles has risen dramatically over the years. The tensile
properties of a geotextile are crucial because the geotextile needs to have adequate
strength to perform well in its desired function. Currently, numerous experimental trials
are conducted to determine the tensile properties of a woven geotextile. This research
developed a theoretical model to predict the tensile behavior of woven geotextile fabrics
made from polypropylene tapes. Several tape and fabric properties were varied in order
for the model to have a wide area of use. These properties included tape denier, tape
tenacity, tape modulus, tape elongation, warp density, fill density, warp crimp and fill
crimp. The theoretical model used the same concepts as the earlier models for woven
fabrics, but because of the different cross sections of the yarns, the models varied. There
was also an empirical model created using the different tape properties as predictor
variables.
In the theoretical model, the fabric strength was predicted using the warp tape
strength, warp tape stretch, bending coefficient, initial warp unit length, and the initial
angle between the warp tape axis and the axis along the intersection of the warp and fill
tapes. The empirical model for fabric strength used the picks per centimeter, ends per
centimeter, and the fill denier in order to predict fabric strength. For the theoretical model
for fabric stretch, the tape stretch, the initial warp unit length, the picks per centimeter,
the bending coefficient, and the initial angle between the warp tape axis and the axis
along the intersection of the warp and fill tapes were used as predictor variables. In the empirical model, fabric strain was predicted using picks per centimeter, warp width, warp
denier, and fill tensile strength.
|