Verification of Self-Loosening Mechanisms for Threaded Fastener (1st Report, Behaviour and Effective Factors for Bolt Loosening under Transverse Cyclic Load Generated by Linearly Vibrating Washer)

Fujioka, Yasuo; Sakai, Tomotsugu

doi:10.1299/kikaic.71.3270

Trans.JSME(C)

2005

DOI: 10.1299/kikaic.71.3270

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Verification of Self-Loosening Mechanisms for Threaded Fastener (1st Report, Behaviour and Effective Factors for Bolt Loosening under Transverse Cyclic Load Generated by Linearly Vibrating Washer)

Yasuo Fujioka

Tomotsugu Sakai²

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2011

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Loosening of Bolted Joints under Transverse Repeated Displacements

Ishimura

Yamanaka²,

Syoji³

et al. 2011

Trans.JSME, Ser.A

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Loosening mechanism of bolted joint was examined experimentally and numerically. The loosening tests were carried out using Junker's type loosening machine. In the Junker's tests, transverse repeated displacements were applied to the bolted joint with a hexagon bolt and nut, and then a reduction in the axial bolt force was measured．In the FEM calculations, the loosening behavior of the bolted joint was examined for the model of type loosening machine.In addition, the effects of the flatness and the surface roughness at the bearing surfaces in the clamped part on the reduction in the axial bolt force were examined in the FEM calculations. As the results, the loosening mechanism was elucidated and it was shown that the effect of the nut rotation was important as well as the elastic torsion of the bolt.The amount of the reduction in the axial bolt force was estimated in the FEM calculation taking account of the flatness and the surface roughness. The numerical results were in a fairly good agreement with the measured results. Discussion was made on the loosening mechanism in bolted joints under transverse repeated displacement.

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Loosening of Bolted Joints under Transverse Repeated Displacements

Ishimura

Yamanaka²,

Syoji³

et al. 2011

Trans.JSME, Ser.A

View full text Add to dashboard Cite

show abstract

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Verification of Self-Loosening Mechanisms for Threaded Fastener (1st Report, Behaviour and Effective Factors for Bolt Loosening under Transverse Cyclic Load Generated by Linearly Vibrating Washer)

Cited by 1 publication

References 0 publications

Loosening of Bolted Joints under Transverse Repeated Displacements

Loosening of Bolted Joints under Transverse Repeated Displacements

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