Determination of Fatigue Life and Failure Location of Vehicle Cylindrical LPG Fuel Tanks
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F. Kartal
Fuat Kartal completed his PhD in mechanical engineering at the Karabuk State University in Turkey. He is Assist. Prof. Dr. at the Kastamonu University, Mechanical Engineering department in Turkey. His working areas include abrasive water jet technology, pressure vessel design and analysis and 3D printing.
Abstract
This study addresses the determination of the fatigue life and its failure locations of the vehicle cylindrical LPG fuel tanks using both experimental and finite element analysis (FEA) methods. The experimental investigations performed as an accelerated fatigue tests are carried out using a hydraulics test unit in which the cylinders are internally pressurized by hydraulic oil. The LPG cylinders are subjected to repeated cyclic pressure varying from zero to service pressure of the tank. The FEA modeling of these tanks are developed in three dimensional (3D) using non-uniform geometrical parameters and nonlinear material properties. These models are also subjected to zero-based high cycle fatigue pressure load considering the stress life approach. The FEA modeling process is also simulated in non-homogeneous material conditions. Therefore, the fatigue life performance and failure location of the cylindrical LPG fuel tanks are predicted and compared to the experimental results.
Kurzfassung
Diese Studie widmet sich der Bestimmung der Ermüdungslebensdauer und Fehlerorte eines zylindrischen LPG-Fahrzeug-Kraftstofftanks mittels experimenteller Methoden und Finite-Elemente-Analyse. Für die experimentellen Untersuchungen, vorgenommen als beschleunigter Ermüdungstest, kommt eine hydraulische Testeinheit zum Einsatz, in der die Zylinder durch Hydrauliköl intern unter Druck gesetzt werden. Die LPG-Zylinder sind wiederholtem zyklischen Druck ausgesetzt, der von Null bis zum Betriebsdruck des Tanks reicht. Die FEA-Modelle dieser Tanks werden anhand uneinheitlicher geometrischer Parameter und nicht-linearer Materialeigenschaften dreidimensional (3D) entwickelt. Unter Berücksichtigung des Stress-Life-Ansatzes sind diese Modelle außerdem nullbasierter High-Cycle-Fatigue-Druckbelastung ausgesetzt. Der FEA-Modellierungsprozess wird auch unter nicht homogenen Materialbedingungen simuliert. Somit werden Ermüdungslebensdauer und Fehlerorte der zylindrischen LPG-Kraftstofftanks vorhergesagt und mit den experimentellen Ergebnissen verglichen.
About the author
Fuat Kartal 
completed his PhD in mechanical engineering at the Karabuk State University in Turkey. He is Assist. Prof. Dr. at the Kastamonu University, Mechanical Engineering department in Turkey. His working areas include abrasive water jet technology, pressure vessel design and analysis and 3D printing.
Acknowledgement
The authors would like to thank Step Inc. (http://www.steplpg.com) to perform these experimental tests, providing LPG tanks and related expenses. Special appreciation is expressed to Faruk Guraksu, General Director and Aydin Karateke, Engineering and Manufacturing Director, and other lab technicians.
Danksagung
Die Autoren möchten sich bei Step Inc. (http://www.steplpg.com) für die Durchführung der experimentellen Tests, die Bereitstellung der LPG-Tanks und die Übernahme der damit verbundenen Kosten bedanken. Besonderer Dank gilt Faruk Guraksu, General Director und Aydin Karateke, Engineering and Manufacturing Director, sowie sonstigen Labormitarbeitern.
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© 2016 Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Editorial
- Editorial
- Determination of Fatigue Life and Failure Location of Vehicle Cylindrical LPG Fuel Tanks
- Coloured Metallography of Ti-6Al-4V Alloys Using Phtalocyanine Blue
- Sample Preparation of Worn Surfaces for EBSD Analysis
- Uncertainties in the Measurement of the Cleanliness of Steels
- Top-ten downloads / Picture of the month
- Top-Ten Article Downloads
- Picture of the Month
- PM-News
- PM-News
- Meeting diary
- Meeting Diary
Artikel in diesem Heft
- Contents
- Editorial
- Editorial
- Determination of Fatigue Life and Failure Location of Vehicle Cylindrical LPG Fuel Tanks
- Coloured Metallography of Ti-6Al-4V Alloys Using Phtalocyanine Blue
- Sample Preparation of Worn Surfaces for EBSD Analysis
- Uncertainties in the Measurement of the Cleanliness of Steels
- Top-ten downloads / Picture of the month
- Top-Ten Article Downloads
- Picture of the Month
- PM-News
- PM-News
- Meeting diary
- Meeting Diary
