Pages 171-172
Deformations of the surfaces of plastic films (nylon, polyethylene and linear low density polyethylene) used for liquid package gags under tensile loads are measured by a digital image correlation technique. The images, which are necessary for a digital image correlation, are captured by a CCD camera, and digitized by an image-processing devise. Several sets of two images, which are called a reference image and a deformed image, so as to determine deformations between the images are used for obtaining the deformations between the no-load condition and failure of the plastic films. The results show that characteristic deformations, which are probably due to molecular orientation in the plastic films, are measured.
