Monitoring of Nd:YAG laser spot welding: Detection of porosity defect by weld sound

2005 ◽  
Author(s):  
S. Yoshioka ◽  
T. Misu ◽  
Y. Kitamura ◽  
T. Tokunaga ◽  
T. Miyazaki
Keyword(s):  
Nd:Yag Laser ◽  
Spot Welding ◽  
Laser Spot ◽  
Laser Spot Welding

Monitoring of YAG laser spot welding

2000 ◽  
Author(s):  
Daisuke Yamada ◽  
Shunro Yoshioka ◽  
Toshiyuki Miyazaki ◽  
Tadashi Misu ◽  
Yasuyuki Shirai
Keyword(s):  
Spot Welding ◽  
Laser Spot ◽  
Yag Laser ◽  
Laser Spot Welding

Thermomechanical Modeling of Laser Spot Welded Solar Absorbers

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
L. A. Spyrou ◽  
N. Aravas
Keyword(s):  
Spot Welding ◽  
Laser Spot ◽  
Structural Failure ◽  
Absorber Plate ◽  
Solar Absorber ◽  
Solar Absorbers ◽  
Laser Spot Welding ◽  
Thermomechanical Modeling ◽  
Different Levels ◽  
Flattening Process

A finite element (FE) approach is developed to investigate the laser spot welding (LSW) of flat-plate solar absorbers and the stress and distortion fields that develop after fabrication and during operation. Numerical calculations at two different levels are carried out. At a microscopic scale, the details of a spot weld are analyzed. At a macroscopic level, a global approach is used to simulate the joining of the pipeline to the absorber plate and the “restoration” (flattening) process of the absorber. The simulated welding-induced distortion is compared with experimental measurements. The thermomechanical behavior of a solar absorber under working conditions is also studied and operational stresses and the critical locations for structural failure are reported.

Pulsed laser spot welding of intersection points for Zircaloy-4 spacer grid assembly

2013 ◽  
Vol 52 ◽  
pp. 487-494 ◽  
Author(s):  
Wang Tao ◽  
Chuang Cai ◽  
Liqun Li ◽  
Yanbin Chen ◽  
Yi Ling Wang
Keyword(s):  
Spot Welding ◽  
Pulsed Laser ◽  
Laser Spot ◽  
Spacer Grid ◽  
Intersection Points ◽  
Laser Spot Welding
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