ANALYSIS OF CANTILEVER BEAM USING DIGITAL IMAGE CORRELATION TECHNIQUE UNDER DIFFERENT LOADING CONDITIONS

Abstract

Most of the Materials fail due to strain ,in different loading conditions. Researchers are involved in the detection of the cause and propagation of the crack . Scientists are working on Digital image correlation (DIC) technique which is a non-contact strain measuring method. DIC provides the information regarding deformation in a specimen by processing two digital images that are captured before and after the deformation. Specimens (with and without hole) under different loading condition have been analyzed using DIC and the results have been assimilated with numerical techniques such as software package Solidworks. This study basically deals with the accuracy of measuring strain and crack tip deformation in the specimen. It has been found that type of loading and camera position affects the accuracy of the measurement of the strain and crack tip propagation. Further, It has been found that the crack propagates curving towards the location of the hole ,when the hole is present within a certain proximity from the line of the crack. Further it was concluded from the results that crack propagates in the same direction as indicated by the displacement fields and strain fields generated around crack tip, in DIC image, priors to its real time propagation.