Abstract
In order to estimate the effect of yarn density of fabric on breaking behaviour, five kinds of the fabrics with different yarn densities were prepared. The warp and weft yarns of these fabrics were composed of 20 denier polyester mono-filaments. The fabric, into which a sharp notch had been introduced, was fractured under a dynamic loading condition. The fracture process was monitored using a load cell and a streak camera. Moreover, the effects of the sample extension rate and the initial crack length on the fracture were investigated. As a result, it is found that the breaking behaviour of the fabrics can be explained to some extent in terms of an energy-balance concept.
