An experimental investigation of the bolt clamping force and friction effect on the fatigue behavior of aluminum alloy 2024-T3 double shear lap joint
An experimental investigation of the bolt clamping force and friction effect on the fatigue behavior of aluminum alloy 2024-T3 double shear lap joint
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DOI：
10.1016/j.matdes.2011.04.022
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发表时间：
2011-09
影响因子：
8.4
通讯作者：
T. Chakherlou;M. Razavi;A. B. Aghdam;B. Abazadeh
中科院分区：
文献类型：
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作者：
T. Chakherlou;M. Razavi;A. B. Aghdam;B. Abazadeh
研究了螺栓夹紧力对螺栓双剪切搭接疲劳寿命的影响。为此，对2024-T3铝合金螺栓夹紧双剪搭接试件进行了疲劳试验。在无润滑和润滑状态下，在不同的循环纵向载荷水平下，施加0.25、2和4 N m的扭矩进行了这些疲劳试验。从这些试验中获得了不同夹紧力在无润滑和润滑状态下的应力-寿命（S-N）数据。结果表明，与间隙配合试样相比，夹紧力提高了试样的疲劳寿命。通常，在较高的拧紧扭矩下，可以获得较高的疲劳寿命，但在一定的载荷水平下，由于微动现象，寿命的提高将停止。此外，润滑试样的部分减少了夹紧力或扭矩拧紧的优势。
In this article, the effect of bolt clamping force on the fatigue life of bolted double shear lap joints was investigated. To do so, fatigue tests were carried out on the bolt clamped double shear lap joint specimens made of aluminum alloy 2024-T3. These fatigue tests were conducted with applied torques of 0.25, 2 and 4 N m at different cyclic longitudinal load levels in un-lubricated and lubricated states. From these tests the stress–life (S–N) data for different clamping forces for un-lubricated and lubricated states were obtained. The results show that clamping force increases fatigue life compared to clearance fit specimens. In general, at higher tightening torque higher fatigue lives were achieved, however, below a certain load level the life improvement was discontinued because of fretting phenomenon. Also lubricating the parts of the specimens reduces the advantage of clamping force or torque tightening.