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Finite Element Based Vehicle Component Fatigue Life Assessment According to a Customer Usage Profile

Finite Elemente basierte Lebensdauerabschätzung von Fahrzeugkomponenten anhand eines Kundennutzungsprofils
Arif Şenol Şener
From the journal Materials Testing

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.


* Correspondence Address, Dr. Arif Şenol Şener, Istanbul Gelisim University, Head of Automotive Department, E-5 Yanyol No:259 Avcilar/İstanbul, Turkey, E-Mail:

Arif Şenol Şener is assistant prof. Dr. in Istanbul Gelisim University, in Department of Mechanical Engineering, Istanbul, Turkey. He obtained his PhD degree from Institute of Science and Technology of Yıldız Technical University, Turkey in 2003. His research areas include automotive customer usage correlation, road test data collection and fatigue life prediction based on finite element analysis.


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Published Online: 2014-10-01
Published in Print: 2014-03-03

© 2014, Carl Hanser Verlag, München

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