Res. Agr. Eng., 2005, 51(2):50-55 | DOI: 10.17221/4902-RAE
Loading regimes and designing helical coiled springs for safe fatigue life
- Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague, Czech Republic
Springs are loaded by harmonic forces very often. High cycles fatigue damage and failure can be found during its service loading. This paper shortly describes stress concentration factor for helical springs on the inner diameter of the spring wire and its evaluation by using FE Method. These results have been compared with correction functions published in the literature. The fatigue safety factor has been derived for three typical loading regimes of springs. All cases are demonstrated in the Haigh diagram. It has been showed that loading cases with constant operational prestress give lowest safety factor then the proportional or constant middle stress regimes.
Keywords: springs; fatigue of materials; loading regimes; safe fatigue life
Published: June 30, 2005 Show citation
References
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