Abstract
In this study, construction and standardization of a track for performing fatigue and reliability tests of light commercial vehicles are described. Such a test track is necessary for design and manufacturing verification of these vehicles. Fatigue characteristics of Turkish roads were determined by analyzing fifty different roads. This paper focuses on defining the load spectrum and equivalent fatigue damage of the leaf spring resulting from accelerated tests on a route. Fatigue analysis and estimated lifetime of the part were calculated using Finite Element Analyses and verified by the Palmgren-Miner rule. When as customer profile the Turkish automotive user is taken into consideration and accelerated test tracks are designed for the reliability and fatigue tests of the related company, linear FEA of the spring represents a convenient procedure.
Kurzfassung
In der diesem Beitrag zugrunde liegenden Studie wird die Konstruktion und die Standardisierung einer Strecke zur Durchführung von Ermüdungs- und Zuverlässigkeitsversuchen von leichten Nutzfahrzeugen beschrieben. Eine solche Strecke ist zur Verifikation der Auslegung und der Fertigung von solchen Fahrzeugen notwendig. Hierzu wurden die Ermüdungscharakteristika von türkischen Straßen bestimmt, indem 50 verschiedene Strecken analysiert wurden. Dieser Beitrag ist auf die Bestimmung der Belastungsspektren und der äquivalenten Ermüdungsschädigung der Blattfeder fokussiert, wie sie aus beschleunigten Versuchen auf einer Strecke üblicherweise resultieren. Die Ermüdungsanalyse und die Abschätzung der Lebensdauer des Teils erfolgten mittels Finite Elemente Analysen und wurden durch die Palmgren-Miner-Regel verifiziert. Werden türkische Automobilnutzer als Kundenprofil berücksichtigt sowie eine entsprechende Strecke für beschleunigte Ermüdungs- und Zuverlässigkeitsversuche des entsprechenden Fabrikanten ermittelt, stellt sich die lineare Finite Elemente Analyse als geeignete Federberechnungsmethode heraus.
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