Dynamic photoelasticity using a laser scanner

TLDR: A low-cost dynamic recording system employing an out-dated fax scanner is presented, demonstrating the feasibility of the system by recording dynamic fringe patterns off a simply supported beam subjected to impact loading.

Abstract: Over the years, several techniques have been developed to record dynamic fringe patterns in photoelasticity. Due to the whole field recording capability, the photoelastic technique continues to be of interest to the experimental mechanics community. A low-cost dynamic recording system employing an out-dated fax scanner is presented in this article. Details of the optical and electronic functions are discussed. The feasibility of the system is demonstrated by recording dynamic fringe patterns off a simply supported beam subjected to impact loading. Further modifications to the set-up to improve the quality of the fringe patterns are discussed briefly.