Mengjia Xu

A Prefabricated Strain-Slice-Style Speckle Pattern for Digital Image Correlation Method Under Air-Oxidation Condition at High Temperature up to 1000 °C

A prefabricated strain-slice-style speckle pattern applied to high-temperature digital image correlation (DIC) method is proposed and studied in this paper. By virtue of spot welding process, this proposed speckle pattern can be prepared directly and easily on specimen surface. A heating experiment was performed to investigate the high-temperature performance of this proposed speckle pattern under air-oxidation condition. Besides, the ability of this proposed speckle for high-temperature DIC method was verified in a thermal expansion experiment, during which thermal deformation and coefficient of thermal expansion (CTE) values were measured and subsequently compared with the reference data. Results show the effectiveness of this prefabricated strain-slice-style speckle pattern for full-field in-plane thermal deformation measurement with high accuracy using DIC method under air-oxidation condition at high temperature up to 1000 °C.