2005, Volume 7, Issue 11
Strategic Study of CAE >> 2005, Volume 7, Issue 11
A New Technology of Plastic Forming Plate by Laser Peening
School of Mechanical Engneering , Jiangsu University, Zhenjiang , Jiangsu 212013, China
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Abstract
Laser peening forming is an emerging modern process developed from laser shock strengthening. During a laser peening event, pressures well above the dynamic yield strength of the material are imparted to the target in a fraction of nanoseconds. The severity of the loading causes local plastic deformation which ultimately results in the development of the uneven residual stress along the thickness of plate, which pushes the plate to deform. Different parameters of laser can induce different residual stress which make plate achieve different shapes, so controlling technical parameters of laser peening can control the distribution of residual stress, indirectly controlling the deformation of plate to satisfy its design. Laser peening forming is a flexible technology, which can form tight radii in thick material with high accuracy and compressive stress into its surface to extend fatigue lifetime. In the end of the paper, the application prospect of technology is outlined.
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References
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[ 2 ] Unternahrer, Robert J, et al.Short-pulse high-peaklaser shock peening[P].U S P, Appl.No:252620
[ 3 ] Lloyd H, Chen Haolin.Laser peening-A processingtool to strength metals or alloys to improve fatiguelifetime and retard stress-induced corrosion cracking[R].Laser Science and Technology, 2003
[ 4 ] 刘鸿文.板壳理论[M].杭州:浙江大学出版, 1987.10 link1
[ 5 ] Hammersley G, Lloyd H, Harris F.Surfaceprestressing to improve fatigue strength of componentby laser shot peening[J].Optics and Laser inEngineering, 2000, 34:327~337
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