単眼カメラによる丸棒試験片の引張試験中の直径およびひずみ分布の計測

抄録

Displacement distribution in circular shaft specimen of steel during tensile test was measured using 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 after the test. Distribution of strain in axial direction was obtained from the displacement distribution and also diameter of the specimen was estimated based on strain distribution in vertical direction to the specimen axis. Distributions of strain and diameter of the specimen were observed during whole tensile test and stress-strain relation based on local deformation was considered.