Photoelastic Analysis of Three-dimensional Stress Systems Using Scattered Light
This is a 1939 NACA technical report, issued by the National Advisory Committee for Aeronautics, on photoelastic stress analysis using scattered light, written for engineers and researchers. The pictures are plain black-and-white photographs and line drawings of a loading fixture, a fringe pattern on a tension specimen, a stress graph, and the polariscope, tank, and camera apparatus, giving a designer a sense of laboratory measurement equipment and the colourful banded fringe patterns it produces.
