Thesis Details

Thesis Title: Principle modeling of woven geotextile fabrics to predict tensile behavior
Thesis Author: Melissa Koenig
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.