摘要
目的研究拉压疲劳载荷对地面停放腐蚀影响系数的影响。方法首先编制加速腐蚀试验环境谱进行预腐蚀试验,随后对预腐蚀后的试验件加载拉压疲劳载荷进行疲劳试验,最后对预腐蚀疲劳试验得到的寿命进行数据分析。结果疲劳载荷无论是拉还是压,都不能改变预腐蚀后的疲劳试验寿命服从对数正态分布的性质,但是疲劳载荷以拉为主的机翼下壁板试验件预腐蚀后,疲劳寿命的分散性随试验寿命的降低而降低,而疲劳载荷以压为主的机翼上壁板结构模拟件预腐蚀后,疲劳寿命的分散性基本不变。结论疲劳载荷以压为主的机翼上壁板结构模拟件的地面停放腐蚀影响系数不随腐蚀年限的增加而变化,而疲劳载荷以拉为主的机翼下壁板试验件的地面停放腐蚀影响系数随腐蚀年限的增加而显著降低。
Objective To study the influences of pull and press fatigue load on corrosion coefficient of parking on the ground. Methods Firstly, the accelerated corrosion test environment spectrum was drawn up to carry out pre-corrosion test. Secondly, a fatigue test of pre-corrosion specimens was done by applying pull and press fatigue loads. Finally, the fatigue life of pre corrosion fatigue test was analyzed. Results The fatigue life always followed the logarithmic normal distribution after pre-corrosion for pull fatigue load and press fatigue load. But the scatter of fatigue life for wing down-panels reduced with the decrease of fatigue life, and the scatter of fatigue life for the wing up-panels did not change Conclusion The coefficient of the wing up-panels test sample does not change with the increase of the corrosion calendar life. But, the coefficient of the wing down-panels test sample descends with the increase of the corrosion calendar life
出处
《装备环境工程》
CAS
2017年第3期14-17,共4页
Equipment Environmental Engineering
基金
总装十二五预研项目(143092015)
关键词
当量环境谱
腐蚀试验
疲劳试验
统计检验
equivalent environment spectrum
corrosion test
fatigue test
statistical test
