Investigation of Fabric Behaviour in Bias Extension at Low Loads
Research and development
Authors:
- Naujokaityte Laura
Department of Clothing and Polymer Products Technology, Faculty of Design and Technologies, Kaunas University of Technology, Kaunas, Lithuania - Strazdiené Eugenija (j/w)
- Domsiené Jurgita (j/w)
 Full text | Abstract: Shear deformations are the most significant mode of deformation during draping or forming processes. The bias extension test can be used to trace the parameters describing fabric shear. In this research the image analysis method in combination with an bias extension test were used for characterisation of the specimen buckling point and surface irregularity changes during uni-axial extension. Buckling point dependence on stiffener concentration was recorded. Shear angle values were obtained by an optical method. Particular focus was placed on the methods capability to distinguish fabrics of similar structure and those that differ in the bending rigidity parameter, which is changed by the PVA stiffener concentration. Shear angle dependence on the load and extension is presented. Shear parameters obtained from the bias extension test were proved to correlate with the shear parameters obtained by well known methods. |
Tags: shear, critical shear angle, bias extension, buckling, image analysis.