Schwingfestigkeit von Schraube‐Mutter‐Verbindungen |
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| Authors: | A Alt Dr‐Ing H Mertens U Arz L Blessing C Berger |
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| Affiliation: | 1. Fachgebiet Konstruktionslehre der TU Berlin;2. Institut für Werkstoffkunde der TU Darmstadt;3. Fachgebiet Konstruktionstechnik und Entwicklungsmethodik der TU Berlin |
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| Abstract: | High cycle fatigue of bolted connections Extensive tests regarding the influences on the fatigue of bolt‐nut‐connections of preloading with torsion, of preloading with yielding, of loading with superimposed bending and of the tested lot are processed. These influences are not yet known according to VDI 2230. New testing devices were designed for these tests, which allow a far less expensive operation and may easily be used for bolts of diameters up to M100 and testing frequencies up to 1000 Hz. The validity of fatigue resistance according to VDI 2230 is specified with respect to the test results. The determined influence of the tested lots is unexpectedly high. The manufacturing process of bolts should be improved to minimize this influence. |
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| Keywords: | Schraube Schwingfestigkeit Frequenzeinfluss Resonanzschwingprü fmaschine Aluminiumschrauben FEM High Cycle Fatigue of bolted connections Influence of the operating frequency HCF Testing device using resonance |
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