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激光喷丸强化是一项新型的表面处理技术,在这个处理过程中会产生残余应力,从而有效抑制材料疲劳裂纹的萌生以及减缓裂纹扩散速率,有效提高材料的疲劳寿命。为有效地控制金属表面残余应力,结合激光喷丸技术的特点,利用神经网络强大的非线性映射能力,将金属材料主要的力学性能参数和激光参数作为网络输入,金属材料表面残余应力作为网络输出,建立金属材料表面残余应力的优化控制模型。最后选用7050Al、A304不锈钢和AM50镁铝合金这三种金属材料对此模型进行验证,验证结果表明此模型可以有效地控制金属材料表面的残余应力。
Laser shot peening is a new type of surface treatment technology. During this process, residual stress will be generated, which will effectively suppress the initiation of fatigue cracks and slow down the rate of crack diffusion, thus effectively increasing the fatigue life of the material. In order to effectively control the residual stress on the metal surface, combined with the characteristics of the laser shot peening technology, using the powerful nonlinear mapping ability of neural network, the main mechanical properties of metal materials and laser parameters as the network input, the residual stress of metal surface as the network output , The establishment of metal material surface residual stress optimization control model. Finally, the model was verified by using three metal materials, 7050Al, A304 stainless steel and AM50 magnesium alloy. The results show that this model can effectively control the residual stress on the surface of metal materials.