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- Title
Simulation, analysis and validation of residual stresses on LY2 aluminium alloy by laser shock processing with elliptical spot.
- Authors
Lu, J. Z.; Luo, K. Y.; Yu, S. S.; Feng, A. X.; Yang, C. J.
- Abstract
The effects of laser shock processing on the residual stresses of the LY2 aluminium alloy samples with elliptical spot (long axis length, 12 mm; short axis length, 3 mm) were experimentally investigated, and the effects of the overlapping rate on the residual stresses were simulated using the Abaqus software. The simulated residual stresses were basically in agreement with the measured data, and the relationship between the magnitude and uniformity of residual stress and the overlapping rate was also addressed. Results show that the largest stress magnitudes are located on the top surface of the sample, and the greatest uniformity is achieved by the overlapping of elliptical laser spots. The overlapping rate is critical for the uniformity of the residual stress across the surface. Within a certain impact number range of one to four times, increasing the shocked number can increase the magnitude of residual stress near the surface but not effectively increase the plastically affected depth.
- Subjects
RESIDUAL stresses; ALUMINUM alloys; LASER peening; STRENGTH of materials; STRAINS &; stresses (Mechanics)
- Publication
Materials Science & Technology, 2011, Vol 27, Issue 1, p225
- ISSN
0267-0836
- Publication type
Article
- DOI
10.1179/174328409X453181