Abstract
A non-contact strain field measurement method using advanced digital images correlation technique has been developed by modification of the classical grating method. In this study, the strain mapping method has been applied to quantify 3D deformations of the surface of woven fabric composites subjected to a tensile loading. The out-of-plane deformation was locally developed by weave pattem in a single layer woven composite. Higher strains was also located in the matrix areas between the longitudinal fiber and transverse fiber bundles and in the area occupied by the transverse fiber bundles. It was obvious that the output of this method gives us detailed information on the unit cell level of textile composites, necessary to understand their deformation behavior, stress concentrations and damage occurrence. To conclude strain filed measurement technique is very useful for understanding the failure mechanism for geometrical defects in textile based composites.
