Mechanical behavior of bolted joints during the tightening process with torque control is analyzed by FEM as elastic plastic contact problems. Three-dimensional analysis was conducted employing two-dimensional model with each node having three degrees of freedom that attains high computation efficiency. Such important factors as development of plastic zones, variations of load distributions along engaged threads, the relationships between axial bolt stress and nut rotation angle were analyzed in order to provide an effective guideline when tightening critical structures with high bolt preloads. It was also shown that the proposed numerical method can be applied to evaluate the tightening process by “plastic region tightening” used extensively in recent years. The validity of the numerical method is demonstrated by comparing the calculated bolt elongation with that obtained from experiment.
Elastic Plastic Finite Element Analysis of Bolted Joint During Tightening Process
Contributed by the Reliability, Stress Analysis and Failure Provention Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received February 2002; revised April 2003. Associate Editor: J. C. Moosbrugger.
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Fukuoka, T., and Takaki, T. (January 22, 2004). "Elastic Plastic Finite Element Analysis of Bolted Joint During Tightening Process ." ASME. J. Mech. Des. December 2003; 125(4): 823–830. https://doi.org/10.1115/1.1631579
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