Analysis on Yield Tightening of Threaded Fasteners

Sayed A. Nassar; Xianjie Yang; Saravanan Ganeshmuthy

doi:10.4271/2008-01-0545

2008-04-14

Analysis on Yield Tightening of Threaded Fasteners 2008-01-0545

In this paper, an emphasis is put on describing the elastic and plastic deformation behavior of the bolted joint. The bolt material is assumed to be plastic hardening. A nonlinear combined stress model is established for a typical bolted joint for the purpose of studying its behavior under a yield tightening. The combined effect of axial and torsional stresses in the tightened threaded fastener is considered. A new approach for yield tightening under ideal plastic bolt was proposed, and the effects of the thread and bearing frictional coefficients on the clamp load prediction are evaluated. The prediction precision of deformation behavior of the bolted joint under yield tightening for the strain hardening bolt material are studied experimentally.

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Analysis on Yield Tightening of Threaded Fasteners 2008-01-0545

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