FEASIBILITY STUDY OF METHODS FOR DYNAMIC THREE DIMENSIONAL PHOTOELASTICITY.
Final rept., 15 May 62-15 5feb 63,
IIT RESEARCH INST CHICAGO ILL
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The feasibility of using photoelasticity and moire methods to obtain dynamic three-dimensional stress distributions was investigated. The photoelasticity methods considered include scattered light techniques, embedded polariscopes, and embedded photoelastic layers in optically insensitive materials. During the course of the program the physical and optical properties of a number of model materials were determined, the effect of stress upon Polaroid materials was established, and several preliminary model studies were conducted using impact loadings. As a result of these experiments, the embedded polariscope technique has been selected as the most suitable method for immediate application to dynamic three-dimensional problems. The instrumentation and calibration procedures required for studies of this type are discussed. Author