摘要: |
以2024铝合金为研究对象,分析板材超声喷丸成形理论,采用ABAQUS有限元模拟和试验相结合的方法,研究整体加强筋板超声喷丸成形工艺。对整体加强筋板与无加强筋板的模拟发现,加强筋对成形曲率影响明显。通过对整体加强筋板的模拟与试验,得出撞针速度与撞针直径对整体加强筋板横向曲率半径影响规律:在不改变其他参数的前提下改变撞针速度,撞针速度小于4m/s时,曲率变化明显,大于4m/s时变化趋于平缓;改变撞针直径时,1.2mm和2mm直径的撞针对板材成形效果明显,之后趋于平缓。 |
关键词: 超声喷丸;整体加强筋板;曲率半径;残余应力 |
基金项目: |
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Ultrasonic Shot Peening Forming Process of Integrally Stiffened Panel |
Miao Wei1,2,3,4
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1.ultrasonic shot peening;2.integrally-stiffened panel;3.curvature radius;4.residual stress
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Abstract: |
This paper regards 2024 aluminum alloy as the object to research the radius of curvature of the ultrasonic shot peening (USP) forming. Using ABAQUS and experiments to explore the USP forming process of integrally-stiffened panel and non-stiffened panel, we found that stiffeners have an obvious impact on curvature. Through the results of the simulation of integrally-stiffened panels reflect the relationship between the impact velocity and the diameter of needles and transverse curvature radius of integrally-stiffened panel. Under the premise of keeping other parameters intact to change impact velocity, when it is less than 4m/s, the curvature changes obviously, while it exceeds 4m/s, the change is leveling off. When changing needle diameter, 2mm diameter of needles show an obvious difference in comparison with 1.2mm diameter of needles. If the diameter exceeds 2mm, the change is leveling off. |
Key words: ultrasonic shot peening;integrally-stiffened panel;curvature radius;residual stress |