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Determining the tensile response of materials at high temperature using DIC and the Virtual Fields Method |
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| Institution: | 1. Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia SC 29208;2. Sandia National Laboratories, Livermore, CA 94551-0969, USA;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China;1. Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA;2. Sandia National Laboratories, Livermore, CA 94551-0969, USA;1. University of Valenciennes, LAMIH UMR CNRS 8201, F-59313 Valenciennes Cedex 9, France;2. Onera–The French Aerospace Lab, Aeroelasticity and Structural Dynamics Department, F-59014 Lille Cedex, France |
| Abstract: | An experimental approach based on Digital Image Correlation (DIC) is successfully applied to predict the uniaxial stress-strain response of 304 stainless steel specimens subjected to nominally uniform temperatures ranging from room temperature to 900 °C. A portable induction heating device equipped with custom made water-cooled copper coils is used to heat the specimen. The induction heater is used in conjunction with a conventional tensile frame to enable high temperature tension experiments. A stereovision camera system equipped with appropriate band pass filters is employed to facilitate the study of full-field deformation response of the material at elevated temperatures. Using the temperature and load histories along with the full-field strain data, a Virtual Fields Method (VFM) based approach is implemented to identify constitutive parameters governing the plastic deformation of the material at high temperature conditions. Results from these experiments confirm that the proposed method can be used to measure the full field deformation of materials subjected to thermo-mechanical loading. |
| Keywords: | Digital image correlation Full-field deformation Tensile properties Virtual fields method 304 stainless steel |
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