Investigating the Tensile Response of Materials at High Temperature Using DIC

摘要

Recent results from a DIC-based experimental analysis conducted to identify the tensile response of materials at high temperature are presented. Full-field deformation response of stainless steel specimen subjected to quasi-static tension at temperatures between 300 and 900°C is examined using 3D digital image correlation. Band-pass filters along with a blue light source are used in the experimental setup, with images acquired using regular CCD cameras. A portable induction heating device equipped with water-cooled copper coils is used to heat the specimen. The use of this equipment allows for rapid heating of the designated area of interest in a specimen to the desired temperature with fairly uniform temperature distribution. Using the load history and measured full-field strain data as input, a VFM-based approach is implemented to identify the constitutive parameters governing the plastic deformation of the material at high temperatures.