Optimization of the fatigue life of threaded connections by the positioning method |
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| Authors: | Kȩstutis Vislavičius Rimantas Kačianauskas Algimantas Krenevičius Jelena Selivonec |
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| Affiliation: | (1) Department of Strength of Materials, Vilnius Gediminas Technical University, Sauletekio ave. 11, 10223 Vilnius, Lithuania |
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| Abstract: | The presented paper addresses the problem of optimization of the fatigue life of threaded connections by the positioning method.
This method presents a technique operating upon the periodic mutual change of nut and stud positions in order to increase
the fatigue life. The modelling of the fatigue life of threaded connections using the positioning method is based on concept
of damageability curve. A mathematical model is formulated in terms of mathematical programming taking into account technological
and operation constraints. The performance and possibilities of the model are demonstrated by numerical experiments. The influence
of weighting and constraints on the fatigue life of threaded connection, the influence of the heights of inter-turnings on
threaded connection fatigue life and the influence of a number of positioning periods on threaded connection fatigue life
when the height of inter-turnings is constant are presented. |
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