Numerical Modeling of Laser Repair Process and Stress Analysis
Abstract
Laser repair uses a laser additive process to repair a part so that the additive material is metallurgically bonded to the base material. A full understanding of the associated physical phenomena, such as melting, solidification and evaporation, is necessary to obtain qualified product. In this study, a mathematical model is established to investigate the influence of powder injection, thermal capillary force and gas pressure which are the primary driven forces for fluid flow in the repair process. Energy balance at liquid-vapor (L/V) and solid-liquid (S/L) interface is calculated. The level set method is employed to track the evolution of the free surface and simulate the dynamic motion of the melt pool. Information on the cooling rate in the heat affected zone (HAZ) is incorporated into the stress model to analyze the stress distribution.
Recommended Citation
L. Han and F. W. Liou, "Numerical Modeling of Laser Repair Process and Stress Analysis," Proceedings of the 22nd International Congress on Applications of Laser and Electro-Optics (2003, Jacksonville, FL), Laser Institute of America, Oct 2003.
Meeting Name
22nd International Congress on Applications of Laser and Electro-Optics, ICALEO 2003 (2003: Oct. 13-16, Jacksonville, FL)
Department(s)
Mechanical and Aerospace Engineering
Keywords and Phrases
Cooling; Heat Affected Zone; Lasers; Level Measurment; Maintenance; Repair; Stress Concentration; Vapors
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2003 Laser Institute of America, All rights reserved.
Publication Date
16 Oct 2003
