Abstract
Fatigue is one of the most significant causes of spring damage. Since fatigue tests play a crucial role in predicting the lifespan of springs, many special test device and test techniques have been describ ed in the literature. In this paper, the significant design and manufacturing steps of a newly developed eccentric spring fatigue testing device are introduced. This device is particularly suitable to perform fatigue life tests on high rigidity springs, such as mold springs. This low-cost device can be used on springs at many different load ratings. In this study, the fatigue process of metal springs and a case study regarding the development and manufacturing process of a new fatigue testing device are described. Furthermore, the fatigue test procedure on metal springs and some test results generated by the spring fatigue test device are also presented.
Kurzfassung
Ermüdung ist eine der häufigsten Ursachen für die Schädigung von Federn. Da Ermüdungsversuche von besonderer Bedeutung sind, um die Lebensdauer von Federn vorherzusagen, wurden viele spezielle Versuchsaufbauten und Versuchstechniken in der Literatur beschrieben. In dem vorliegenden Beitrag werden die signifikanten Design- und Produktionsschritte einer neu entwickelten exzentrischen Ermüdungsprüfmaschine für Federn eingeführt. Diese Versuchsanlage ist besonders geeignet, um Ermüdungsversuche an Federn mit einer hohen Steifigkeit durchzuführen, wie beispielsweise geschmiedete Federn. Es können viele verschiedene Laststufen auf die Federn angewandt werden, in dem diese kostengünstige Einrichtung verwandt wird. Darüber hinaus werden die Testprozedur für Ermüdungsversuche an Metallfedern und einige Ergebnisse, die mit der Versuchseinrichtung gewonnen wurden, präsentiert.
References
1 M.Meissner, H. J.Schorcht: Metal Springs – Fundamentals, Materials, Analysis, Design, and Computer Use, 2nd Ed., Springer, Berlin, Germany (2007)Search in Google Scholar
2 J. L.Porteiro: Spring Design Optimization with Fatigue, Graduate Thesis, University of South Florida, USA (2010)Search in Google Scholar
3 LesjöforsAB, Spring durability and spring fatigue: http://www.lesjoforsab.com/technical-information/durability.asp, Accessed 16 June 2017Search in Google Scholar
4 H.Pihtili, L.Ozler: The basic principles to be followed in test procedures of spring wire fatigue and fatigue tests, Engineer and Machine (1997), pp. 38–41(in Turkish)Search in Google Scholar
5 The Engineering Toolbox: http://www.engineeringtoolbox.com/steel-endurance-limit-d_1781.html, Accessed 8 February 2017Search in Google Scholar
6 L.Del Llano-Vizcaya, C.Rubio-Gonzalez, G.Mesmacque, C.Cervantes-Hernandez: Multiaxial fatigue and failure analysis of helical compression springs, Engineering Failure Analysis13 (2006) No.8, pp. 1303–131310.1016/j.engfailanal.2005.10.011Search in Google Scholar
7 B.Kaiser, C.Berger: Fatigue behavior of technical springs, Materials Science andEngineering Technology36 (2005), No.1, pp. 685–69610.1002/mawe.200500940Search in Google Scholar
8 N.Tosun, L.Ozler: Design and manufacture of a laboratory-type spring fatigue testdevice, National Congress of Machine Design and Manufacture, UMTIK, Ankara, Turkey (2000)(in Turkish)Search in Google Scholar
9 N.Borms, D.De Schamphelaere, J.De Pauw, P.De Baets, W.De Waele: Conceptual design of a fretting fatigue testing device, Sustainable Construction and Design2 (2011)No. 3, pp. 370–377Search in Google Scholar
10 J.De Pauw, P.De Baets, W.De Waele, R.Hojjati-Talemi: Design of a frettingfatigue test rig with compliant springs, Sustainable Construction and Design4 (2013) No. 2, pp. 1–610.21825/scad.v4i2.1074Search in Google Scholar
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