Abstract
A two-dimensional photoelastic study was made of the stresses produced in a regular hexagon with a central, circular hole when subjected to external pressure. Four sizes of the hole were tested, and three types of loading were used. This paper describes the pressure-loading fixtures and the procedure which was used to calibrate them. An experimental confirmation of the theoretical solution of Kawaguchi1 is given, and typical stress patterns and boundary stress distributions are included.
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