ABSTRACT
The complex problem of measuring displacement and strain fields inside a solid body can be solved by combining stress freezing photoelasticity with moiré interferometry measurements. The hybrid method utilizes a three-dimensional photoelastic model, loaded and processed by a stress-freezing cycle. The model is then dissected and sliced. High-frequency moiré gratings are applied to the (previously) internal planes and the slices are annealed to relieve the deformation. Analysis by a moiré interferometer reveals full-field maps of the U and V displacements released by the annealing step.
