摘要
为了探究不同激光冲击区域对铝合金板材缺口的疲劳性能的影响,对7075-T651合金板材结构的缺口的不同区域进行了激光冲击处理。第1种方法仅针对板材的缺口边缘进行激光冲击;第2种方法是在板材缺口的一定范围内进行激光冲击。结果表明:采用第1种激光冲击方法,板材表面粗糙度更小,且板材的特征疲劳寿命是第2种激光冲击方法的3.23倍。通过对激光冲击的板材进行有限元仿真分析,揭示了激光冲击强化对板材疲劳寿命影响的原因。只有设置合理的激光冲击参数与冲击区域才能有效地改善疲劳性能,提升结构的疲劳寿命,不合理的冲击处理方式反而会降低结构的疲劳寿命。
In order to explore the influence of the different laser impact areas on the fatigue performance of aluminum alloy plate notched, the effect of the laser impact treatment on the different areas of 7075-T651 alloy plate structure notchedis conducted. The first method is laser impact only on the edge of the gap, and the second method is laser impact within a certain range of the gap. The results show that the surface roughness of the plate is smaller and the characteristic fatigue life of the plate is 3.23 times than that of the second laser impact method. Through the finite element simulation analysis of the plate subjected the laser impact, the reason of the laser impact on the fatigue life of the plate was revealed. Only to set the reasonable laser impact parameters and impact area will effectively improve the fatigue performance and the fatigue life of the structure be will increase, while the unreasonable impact treatment will reduce the fatigue life of the structure.
作者
殷之平
陈瑶
黎泽松
郭挺
YIN Zhiping;CHEN Yao;LI Zesong;GUO Ting(School of Civil Aviation,Northwestern Polytechnical University,Xi′an 710072,China;Shaanxi Qianshan Avionics Co.,Ltd.,Xi′an 710072,China)
出处
《机械科学与技术》
CSCD
北大核心
2022年第12期1907-1913,共7页
Mechanical Science and Technology for Aerospace Engineering
