Thermal Fatigue Test of an Annular Structure

• Published in: Journal of mechanical science and technology Vol. 20; no. 1; pp. 59 - 65
• Main Authors: HWANG, Jeong-Ki, SUH, Chang-Min, KIM, Chae-Ho
• Format: Journal Article
• Language: English
• Published: Seoul 대한기계학회 2006; Korean Society of Mechanical Engineers; Springer Nature B.V
• Subjects: Annular; Crack initiation; Crack propagation; Exact sciences and technology; Fatigue (materials); Fluid penetrant testing; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Mathematical analysis; Mathematical models; Physics; Solid mechanics; Strain; Structural and continuum mechanics; 기계공학; Thermal characteristic; Thermal behavior; Cyclic test; Thermal cycle; Thermal Loads; Penetration test; Thermomechanical properties; Thermal fatigue; Thermal load; Experimental study; Scale model; Modeling; Crack propagation; Deformation measurement; Finite element method; Fatigue test; Ring; Cyclic load; Thermal test; Crack initiation; Structural analysis
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/BF02916200

A half-scaled large test model for the main components of the real annular structure was built and the thermal behaviors were experimented and obtained by thermal cyclic loads. The model design and the test conditions for the thermal loads were determined to take into consideration the thermal and mechanical loads acting on the real annular structure by finite element analyses. Temperature profiles and strains of the main components of the model were measured at an early stage of the test and periodically throughout the test in the given test conditions. After completion of the thermal cyclic tests, no evidence of crack initiation and propagation were identified by a dye penetration test. The measured strains at the critical parts were slightly increased proportionally with the increase in the number of the thermal cycles.[PUBLICATION ABSTRACT]