OS1810 Measurement of Strain in Steel Plates During Tensile Test Using DIC

Displacement distribution in a steel plate specimen during tensile test was measured with Digital Image Correlation (DIC) method. Video image of the specimen surface was continuously taken during tensile test and static images were selected from the movie file. Displacement distribution for plastic deformation after yield point was mainly considered. Analytical method to measure large local deformation at the necking area was considered and strain distribution was obtained from the displacement distribution from uniform deformation stage to near the final fracture. Stress-strain relation was investigated for the plastic deformation and it was found that similar relation holds from uniform deformation stage and the stage of necking near the fracture.