铝合金非承载十字接头疲劳特性
Fatigue property of aluminum non-load bearing cruciform joint
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摘要: 基于结构应力法,计算拉伸疲劳加载时不同几何尺寸的7N01铝合金非承载十字接头的结构应力,并结合疲劳试验数据建立其疲劳失效的主S-N曲线.结果表明,与名义应力法相比,基于结构应力法的主S-N曲线线性相关性更好,能够适应不同几何尺寸十字接头疲劳的计算.进一步分析相同名义应力下,承载板厚度对疲劳寿命的影响,结果表明,接头疲劳承载能力的增加与板厚的增加并非线性关系,随着承载板厚度增加,接头疲劳寿命降低.Abstract: The structural stress of 7N01 non-load bearing cruciform joints with different geometrical magnitude under fatigue loading was calculated, and the corresponding master S-N curve was obtained. The results show that, compared with the nominal stress based S-N curve, master S-N curve based on structural stress method shows much better linear correlation for cruciform joints with different geometry. The influence of plate thickness on fatigue strength was then analyzed. The results show that the relationship between load bearing ability and plate thickness is nonlinear. When nominal stress remains the same, fatigue life is reduced when plate thickness is increased.
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Keywords:
- structural stress /
- fatigue /
- aluminum alloy /
- non-load bearing cruciform joints
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其他类型引用(5)
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