Abstract
On annealed carbon steel, the effect of a localized yield area on distribution of strain is observed by using electronic speckle pattern interferometry (ESPI). First, the decrease of the Young's modulus with yielding is examined by using ESPI. Next, on loaded specimen, distribution of strain is observed by using ESPI. This observation is done for the specimen that has a localized yield area and the specimen that does not have a localized yield area. As a result, these distributions of strain are different. For that reason, on annealed carbon steel, the effect of variation of the Young's modulus with yielding on distribution of strain is examined by using ESPI.
