| INVESTIGATIONS ON LASER SHOCK-PROCESSING (LSP) TO IMPROVE FATIGUE LIFE OF SMALL HOLE IN AIRCRAFT STRUCTURES |
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| 作者姓名： | Zhang Yongkang |
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| 作者单位： | Zhang Yongkang(Institute of Acoustics and Lab of Modern Acoustics，Nanjing University，Nanjing，China，210093)Yu Chengye(Nanjing University of Aeronautics and Astronautics，Nanjing，China，210016) |
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| 摘 要： | SupportedbytheFoundationofAFFDThelasershock-processing(LSP)usesmechanics-effectproducedbyinteractionoflaserwithmattertoimprovesurfacepropertiesofmaterials.Thatistosay,anintensiveshort-pulselaserwithhigh-powerisusedtoshockthesurfaceofmetal,whichmakescoatingtovaporize,expand,ionize,andthentoformdetonationwavesthattravelintothemetals.Underthishighpressureoftheshockwavesitheplasticdeformationisproducedandastrengtheningsur-'facelayerisformed-Therefore,thefatigueresistanceisimproved.In199O,theF…
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INVESTIGATIONS ON LASER SHOCK-PROCESSING (LSP) TO IMPROVE FATIGUE LIFE OF SMALL HOLE IN AIRCRAFT STRUCTURES |
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| Zhang Yongkang.INVESTIGATIONS ON LASER SHOCK-PROCESSING (LSP) TO IMPROVE FATIGUE LIFE OF SMALL HOLE IN AIRCRAFT STRUCTURES[J].Chinese Journal of Aeronautics,1997(1). |
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| Authors: | Zhang Yongkang |
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| Abstract: | Laser shock-processing (LSP) is of particular advantage for improving fa-tigue behavior of small holes and blind holes. Because there are not good accessibility andpassage, these holes cannot be treated by shot peening or cold extrusion. The fatigue livesof aircraft aluminum alloy 2024-T62 are increased greatly by means of optimization oflaser shocking parameters. With 95 % confidence, the mean fatigue life of LSP specimensis 4. 35~7, 75 times larger than that of the un-shocked ones. |
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| Keywords: | laser shock-processing(LSP) aircraft structures aluminum alloys fatigue life |
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