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http://dx.doi.org/10.5139/JKSAS.2021.49.8.617

Thermal Deformation Measurement of Notched Structure Using Global-local Multi-DIC System  

Xin, Ruihai (Department of Aerospace Information Engineering, Konkuk University)
Doan, Nguyen Vu (Department of Aerospace Information Engineering, Konkuk University)
Goo, Nam Seo (Department of Aerospace Information Engineering, Konkuk University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.49, no.8, 2021 , pp. 617-626 More about this Journal
Abstract
During supersonic flight of vehicles, the thermal behavior of structures under high-temperature environment is important for thermal-structural design. In this study, full-field thermal deformation and stress concentration of the notched structure was performed using global-local multi-digital image correlation (multi-DIC) systems. This techniques were developed and implemented by multi-DIC systems consists of 2D DIC system and 3D DIC system. The specimen was heated in a heating chamber to achieve the thermal expansion behavior. Then the images of structure's deformation and stress concentration at various temperature were recorded and analyzed by multi-DIC system. Afterward, full-field thermal deformation of the notched structure was determined with DIC technique and stress concentration at the notched structure was calculated by further processing. Finite element analysis of the notched structure is performed in ABAQUSTM and the results of the experiments show good agreement with those obtained from simulation. The results achieved in this study show the efficiency of the muilti-DIC method in thermal deformation as well as stress concentration of notched structure.
Keywords
Digital Image Correlation System; Thermal Deformation; Finite Element Method; In-plane Deformation;
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