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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February 2015
Research-Article
Thermomechanical Modeling of Laser Spot Welded Solar Absorbers
L. A. Spyrou,
L. A. Spyrou
1
Centre for Research and Technology
Hellas (CERTH),
e-mail: lspyrou@ireteth.certh.gr
Hellas (CERTH),
Institute for Research and Technology—Thessaly
,Volos 38333
, Greece
e-mail: lspyrou@ireteth.certh.gr
1Corresponding author.
Search for other works by this author on:
N. Aravas
N. Aravas
Professor
Fellow ASME
Department of Mechanical Engineering,
Fellow ASME
Department of Mechanical Engineering,
University of Thessaly
,Volos 38334
, Greece
International Institute for Carbon Neutral
Energy Research (WPI-I2CNER),
e-mail: aravas@mie.uth.gr
Energy Research (WPI-I2CNER),
Kyushu University
,744 Moto-oka, Nishi-ku
,Fukuoka 819-0395
, Japan
e-mail: aravas@mie.uth.gr
Search for other works by this author on:
L. A. Spyrou
Centre for Research and Technology
Hellas (CERTH),
e-mail: lspyrou@ireteth.certh.gr
Hellas (CERTH),
Institute for Research and Technology—Thessaly
,Volos 38333
, Greece
e-mail: lspyrou@ireteth.certh.gr
N. Aravas
Professor
Fellow ASME
Department of Mechanical Engineering,
Fellow ASME
Department of Mechanical Engineering,
University of Thessaly
,Volos 38334
, Greece
International Institute for Carbon Neutral
Energy Research (WPI-I2CNER),
e-mail: aravas@mie.uth.gr
Energy Research (WPI-I2CNER),
Kyushu University
,744 Moto-oka, Nishi-ku
,Fukuoka 819-0395
, Japan
e-mail: aravas@mie.uth.gr
1Corresponding author.
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received March 14, 2014; final manuscript received July 30, 2014; published online November 26, 2014. Assoc. Editor: Wayne Cai.
J. Manuf. Sci. Eng. Feb 2015, 137(1): 011016 (15 pages)
Published Online: February 1, 2015
Article history
Received:
March 14, 2014
Revision Received:
July 30, 2014
Online:
November 26, 2014
Citation
Spyrou, L. A., and Aravas, N. (February 1, 2015). "Thermomechanical Modeling of Laser Spot Welded Solar Absorbers." ASME. J. Manuf. Sci. Eng. February 2015; 137(1): 011016. https://doi.org/10.1115/1.4028197
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