激光切割对飞机蒙皮疲劳性能的影响分析
Effect of laser cutting on fatigue performance of aircraft skin
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摘要: 为了探索激光切割对飞机机身蒙皮材料疲劳性能的影响,采用仿真分析法和对比试验法对飞机蒙皮材料的疲劳性能进行了理论分析和实验验证,取得了飞机蒙皮材料有限元疲劳分析数据,以及机械铣削和激光切割的试件的疲劳性能测试的对比数据,同时借助扫描电镜对试件疲劳断口进行了扫描分析。结果表明,经过激光切割后飞机蒙皮材料的疲劳寿命为5.4104左右,机械铣削试件疲劳寿命为2.34105。激光切割对飞机机身蒙皮材料疲劳性能有一定的影响,但通过切缝打磨处理会提高其疲劳寿命。Abstract: In order to explore effect of laser cutting on fatigue performance of aircraft fuselage skin, by using the method of simulation and contrast test method respectively, fatigue performance of aircraft skin material was studied by theoretical analysis and experimental verification. Analysis data of finite element fatigue of aircraft skin material, and comparison data of fatigue performance test of laser cutting specimen and mechanical milling specimen were obtained. At the same time, fatigue fracture of aircraft skin plate was scanned and analyzed by scanning electron microscope. The analysis results show that after laser cutting, fatigue life of aircraft skin material is about 5.4104. After mechanical milling, fatigue life is 2.34105. Laser cutting has a certain impact on fatigue performance of aircraft fuselage skin materials, but its fatigue life can increase through grinding and processing of cutting seams.
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Key words:
- laser technique /
- laser cutting /
- fatigue life /
- aircraft skin /
- machinery cutting
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