Evaluation and characterization method of laser spot for all-angle directions

2021 ◽  
Author(s):  
Sibo Zhang ◽  
Yirui Huang ◽  
Fei Wang ◽  
Chengshuang Zhang ◽  
YanLing Bao ◽  
...  
Keyword(s):  
Laser Spot

Modelling of the laser spot size dependence of retinal thermal damage

2005 ◽  
Author(s):  
Karl Schulmeister ◽  
Bernhard Seiser ◽  
Florian Edthofer ◽  
David J. Lund
Keyword(s):  
Size Dependence ◽  
Thermal Damage ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size

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

Laser spot image acquisition and processing based on LabVIEW

Optik ◽  
2019 ◽  
Vol 185 ◽  
pp. 505-509 ◽  
Author(s):  
Yingming Zhang ◽  
Yongliang Li ◽  
Xiaokun Gu ◽  
Hongxin Liu ◽  
Yipeng Zhang ◽  
...  
Keyword(s):  
Image Acquisition ◽  
Laser Spot ◽  
Spot Image

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.

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