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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Effect of different temperatures on the fatigue behavior of interference fitted plates of Al-alloy 7075-T6
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Effect of different temperatures on the fatigue behavior of interference fitted plates of Al-alloy 7075-T6

机译：不同温度对Al合金干涉拟合板疲劳行为的影响7075-T6

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摘要

The effect of short time exposure to thermal cycle on the fatigue life of interference fitted fastener holes was evaluated by experimental and numerical method in Al-alloy 7075-T6. When interference fitted holes are subjected to temperature, the pre-stresses produced by interference fit may be considerably redistributed. To investigate the pre-stresses redistribution and its effect on the fatigue life of interference fitted specimens, two different temperatures (i.e. 60 celcius and 120 celcius), apart from room temperature, were selected. The fatigue tests were performed to obtain S-N curves. Tangential pre-stress distribution was analyzed by the finite element method. Three-dimensional stress distributions of interference fit process have been determined around the hole at three temperatures: 25 celcius, 60 celcius, and 120 celcius. The finite element analyses justify the experimentally observed fatigue test behavior. The results show that the short period thermal cycle could improve the fatigue life of the prepared samples.
机译：通过Al-Alloy 7075-T6中的实验和数值方法评估短时间暴露于热循环对干涉装配紧固件孔的疲劳寿命的影响。当经过干涉装配孔的温度时，可以显着重新分配通过过盈配合产生的预应力。为了调查预应力再分布及其对干涉拟合试样的疲劳寿命的影响，选择了除了室温的两个不同温度（即60 celcius和120 celcius）。进行疲劳试验以获得S-N曲线。通过有限元法分析切向预应力分布。在三个温度下围绕孔确定了三维应力分布在孔周围：25个塞尔西乌斯，60个塞尔西乌斯和120个细胞。有限元分析了实验观察到的疲劳试验行为的证明。结果表明，短周期热循环可以改善制备样品的疲劳寿命。

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