Diffraction Moire of Dynamic Events

摘要

A system using diffraction moire to study dynamic loading events in opaque specimens is described. 150 1/mm diffraction gratings were replicated onto pre-notched steel bars and illuminated by a pulsed ruby laser during impulse loading. Details of the technique and equipment as well as typical data are presented. A similar experiment with a graphite/epoxy specimen and 1200 1/mm grating is briefly discussed. (ERA citation 11:030383)