Strain analysis in diametral compression test through digital image correlation

In the search for alternatives to obtain more information from rock tests and make them accessible, this study applies Digital Image Correlation technique (DIC 2D) in a diametral compression test called Brazilian Test, comparing result measured by an extensometer with obtained DIC. Rock provide about characteristics applicable several engineering areas, such as mining construction. using strain gauges measure strain, equipment is expensive there risk of breaking instrument due contact specimen. However, measuring through DIC may be open source software lower cost when compared extensometers. The results demonstrate that enables: 1) complementing diametrical gauges, example, supporting visualization crack propagation; 2) some cases, replacing use extensometers, far variation tolerated.