Abstract: “This paper presented an extended digital image correlation technique (EDIC) for mapping damages in concretes. A digital image camera was used to scan the surfaces of investigated concrete beams during the loading process. The developed EDIC technique was used to computationally detect macro and micro cracks, and predict micro crack propagation before the crack become visually detectable. This developed EDIC technique is essential to carry out an in-situ mapping damages in concrete structures. This new technique firstly extended the capability of current digital image correlation technique by computational detecting multiscale cracks, which enables a non-destructive test of structural damages. This developed EDIC technique can be used for further research on material damages in the society of concrete academia and applications in detecting damages of ageing concrete structures in concrete related industries.”

Keywords: Extended digital image correlation, Mapping damages in concretes, Distance transformation algorithm, Critical damage strain, Multiscale crack