Abstract
A technique using a CCD camera system is proposed for measuring simultaneously the local displacements at many points on a deformed fabric in the tensile process without contacting with the sample. The local displacements can be transformed into local plane strains and a characteristic angle representing the global deformation. The distribution of strains on the fabric surface is characterized by the average and width of distribution of the local strains. The technique was applied to a few kinds of polyester fabrics and verified to be an effective means for clarifying quantitatively the distribution of local strains on fabrics extensively deformed.
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