Abstract
In this paper, we characterize the dynamics of the molecular chains at different stages of stretching polymeric monofilament fibers. The main stages characterized in this work are shear-bands, necking, crazes, cracks, and fracture regions. Digital photoelasticity and white-light two-beam interferometry are utilized to study each phenomenon by finding the dispersion curves and the 3D birefringence profiles using a single-shot pattern, which is performed for the first time, to our best knowledge. We also suggest an equation to find the full-field distribution of the oscillation energy. This study presents a clear vision on the behavior of the polymeric fibers at a molecular level during dynamic stretching until reaching its fracture point. Patterns of these deformation stages are given for illustration.
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