激光喷丸参数对7075铝合金残余应力分布影响规律的数值分析
发布时间：2019-05-10 21:53
【摘要】：为了研究不同激光喷丸参数对残余应力分布的影响规律,较快获取期望的残余应力分布,通过利用有限元软件ABAQUS对激光喷丸过程进行数值模拟,完成了7075航空铝合金靶材在不同冲击波峰值压力、冲击次数、光斑大小及搭接率等工艺参数下的数值模拟。模拟结果表明:随着峰值压力的增加,材料表面残余压应力也增加,当峰值压力增大到一定值时,材料表面残余压应力达到最大;当峰值压力一定时,材料表面及内部残余压应力随光斑大小及冲击次数的增加而增加;随着光斑搭接率的增加,材料表面残余压应力增大,且随着搭接率的增加,表面残余压应力的波动逐渐减小。
[Abstract]:In order to study the influence of different parameters of laser shot peening on the residual stress distribution and obtain the desired residual stress distribution quickly, the numerical simulation of laser shot peening process was carried out by using the finite element software ABAQUS. The numerical simulation of 7075 aviation aluminum alloy target under different shock wave peak pressure, impact times, spot size and lap rate is completed. The simulation results show that with the increase of peak pressure, the residual compressive stress on the surface of the material also increases. When the peak pressure increases to a certain value, the residual compressive stress on the surface of the material reaches the maximum. When the peak pressure is constant, the residual compressive stress on the surface and interior of the material increases with the increase of spot size and impact times. With the increase of spot grafting rate, the residual compressive stress on the surface of the material increases, and with the increase of the splicing rate, the fluctuation of the residual compressive stress on the surface decreases gradually.
【作者单位】： 华南理工大学机械与汽车工程学院;广州民航职业技术学院飞机维修工程学院;
【基金】：国家自然科学基金资助项目(51575117)
【分类号】：V261
本文编号：2474029
[Abstract]:In order to study the influence of different parameters of laser shot peening on the residual stress distribution and obtain the desired residual stress distribution quickly, the numerical simulation of laser shot peening process was carried out by using the finite element software ABAQUS. The numerical simulation of 7075 aviation aluminum alloy target under different shock wave peak pressure, impact times, spot size and lap rate is completed. The simulation results show that with the increase of peak pressure, the residual compressive stress on the surface of the material also increases. When the peak pressure increases to a certain value, the residual compressive stress on the surface of the material reaches the maximum. When the peak pressure is constant, the residual compressive stress on the surface and interior of the material increases with the increase of spot size and impact times. With the increase of spot grafting rate, the residual compressive stress on the surface of the material increases, and with the increase of the splicing rate, the fluctuation of the residual compressive stress on the surface decreases gradually.
【作者单位】： 华南理工大学机械与汽车工程学院;广州民航职业技术学院飞机维修工程学院;
【基金】：国家自然科学基金资助项目(51575117)
【分类号】：V261
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