Effect of different temperatures on the fatigue behavior of interference fitted plates of Al-alloy 7075-T6

被引：1
|
作者：
Taghizadeh, H. [1 ]
Chakherlou, T. N. [1 ]
机构：
[1] Univ Tabriz, Fac Mech Engn, POB 51666-14766, Tabriz 51666, Iran
来源：
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS | 2019年 / 233卷 / 07期
关键词：
Fatigue life; interference fit; thermal cycle; pre-stress; finite element; COLD EXPANSION; CRACK-GROWTH; LIFE; HOLES; JOINT;
D O I：
10.1177/1464420717747308
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
引用
收藏
页码：1324 / 1335
页数：12
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