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Modeling of pinning phenomenon in Iwan model for bolted joint
Tribology International ( IF 6.2 ) Pub Date : 2021-05-05 , DOI: 10.1016/j.triboint.2021.107071
Prabhat Ranjan , Ashok Kumar Pandey

Clearance between bolt and hole in the bolted joint allows the slipping of jointed beams when subjected to vibratory/shock loading. When this jointed beam slips the distance equal to the clearance of bolted joints, the pinning initiates. The pinning phenomena result in the compression and restitution phase in the bolted joint, which results in energy dissipation. This work proposes an improved Winkler elastic foundation based model referred as edge effect model to obtain the pinning force. The proposed model considers the stress concentration at edges during the pinning and is found to give satisfactory results in both conforming as well as non-conforming contact cases. Moreover, the hysteresis loop due to compression and restitution is also obtained using instantaneous contact stiffness based on pinning force obtained from the edge effect model. Finally, the proposed hysteresis loop during pinning is integrated into the Iwan model to have a better understanding of the response of the bolted joint subjected to vibratory/shock loading.



中文翻译:

Iwan模型中螺栓连接销钉现象的建模

螺栓和螺栓连接孔之间的间隙允许在受到振动/冲击载荷时滑动连接梁。当此节理梁滑移的距离等于螺栓节的间隙时,就会开始固定。钉扎现象导致螺栓连接的压缩和恢复阶段,从而导致能量耗散。这项工作提出了一种改进的基于Winkler弹性基础的模型,称为边缘效应模型,以获取钉扎力。所提出的模型考虑了在钉扎过程中边缘处的应力集中,并且发现在合格和不合格的接触情况下均给出令人满意的结果。此外,基于从边缘效应模型获得的钉扎力,还可以使用瞬时接触刚度来获得由于压缩和恢复而产生的磁滞回线。

更新日期:2021-05-12
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