S. Suprapedi,"toyooka, TIME-DIVISION OBSERVATION OF PLASTIC-DEFORMATION PROCESS USING DIGITAL SPECKLE PATTERN INTERFEROMETRY, Optical review, 4(2), 1997, pp. 284-287
Time-division digital speckle pattern interferometry to observe tempor
al variation of in-plane deformation fields of a whole process of plas
tic deformation until fracture was proposed. Experiment of tensile tes
t of an aluminum-plate exhibited dynamic movements of successive fring
e patterns which were very complicated. They suggest that plastic defo
rmation propagates nonlinearly in the specimen by repetition of energy
relaxation processes and concentration processes.