Abstract
The unloaded photoplasticity technique can be employed in a large variety of applications such as plane stress, plane strain, axisymmetric and general three-dimensional problems. Depending on the type of application, different sets of results may be obtaind : for example distributions of plastic strain differences, principal strain directions (isoclinics), slip-line directions and elastoplastic boundaries. The compression of a short cylindrical strut is the most typical and essential process in plastic forming. It is universally significant to study this kind of deformation, and to apply the obtained information to complex deformation analysis. This paper presents how an experimental method of photoplastic strain freezing, which was proposed by the authors, was used to obtain the three-dimensional strain distribution for compressed cylinders. The results were intended to present a very good accuracy of photoplastic strain freezing solutions to compare overall displacements calculated by integration of strains determined by photoplasticity with displacements measured by a micrometer directly over the models or slices.
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