Bias tensile strength behaviors of woven fabric: theoretical and experimental

This paper mainly focuses on the uniaxial bias extension behaviors of quartz plain weave fabrics. A series of bias extension tests are carried out on quartz plain weave fabrics with different widths to evaluate the strength behaviors. A portable microscope is adopted to capture and record informative resources on the sample surface. The tensile tenacity, load-displacement curves, width change history as well as Poisson's ratio history of different sample widths are compared and analyzed. Also, a theoretical model is proposed to predict the critical width which is the maximum width without yarn failure in bias extension test. Theoretical prediction shows reasonable agreement with experiments. Tensile tests operated on three directions (warp, weft, and bias) reveal the significant mechanical difference is primarily caused by different failure mechanisms.