TY - JOUR AU - Sutton, M. A. AB - Applications of Digital.Image-Correlation Techniques to Experimental Mechanics by T.C. Chu, W.F. Ranson, M.A. Sutton and W.H. Peters to demonstrate the viability of the method for actual Introduction measurements. Optical measurements of macroscopic parameters, such as strain and displacement, have evolved into an accepted Theory of Deformation for Use in the branch of experimental stress analysis. Topics such as Correlation Method holographyJ ,2 speckle interferometry, 3 speckle photo- graphy/-6 speckle-shearing interferometry/ white-light speckle s and moir~ 9'~~ have advanced from the basic Basic Assumption research stage into mature methods employed to analyze Consider an object that is illuminated by a light source. a variety of engineering problems. The light-intensity patterns reflected from the undeformed However, all of these techniques suffer from two major and deformed object surfaces are shown in Fig. 1. Intensity limitations. First, they have varying stability requirements. patterns f(x,y) and f*(x*,y*) in Fig. 1 correspond to All interferometric methods have stringent stability require- the reflected light from the undeformed and deformed ments which limit their applicability to research environ- object configurations. Relative to the intensity patterns, ments for most cases. Speckle photography, moirg and f(x,y) and f*(x*,y*), respectively, they are assumed to white-light speckle have less stringent TI - Applications of digital-image-correlation techniques to experimental mechanics JF - Experimental Mechanics DO - 10.1007/BF02325092 DA - 1985-09-01 UR - https://www.deepdyve.com/lp/springer-journals/applications-of-digital-image-correlation-techniques-to-experimental-TT087NiI9r SP - 232 EP - 244 VL - 25 IS - 3 DP - DeepDyve ER -