Analysis of Stress-Wave Propagation by Photovisocelastic Techniques

An experimental procedure for determining stress-wave action in a dynamically loaded model structure is developed. A high-speed framing camera (100,000 frames/sec), in conjunction with a high-intensity light source, is used to photo-record dynamic fringe patterns in photoviscoelastic materials. The theory of linear viscoelasticity is then used to relate fringe time histories to stress (or strain) histories. The materials used for the models exhibit linear viscoelastic behavior. Response to load is a function of rate of load application. Theoretical analysis of complex viscoelastic structures is usually difficult, and, in some cases, quite impractical. The need for a quantitative experimental technique to assess such structures clearly exists. Results of the research indicate quantitative photoviscoelastic techniques are feasible.

Print ISSN

0361-4573

Published

1964-09

Content type

Original Research

DOI

10.5594/J07180