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Failure analysis of a cracked gasoline engine cylinder head

Azadi, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1007/s11668-012-9560-6
  3. Publisher: 2012
  4. Abstract:
  5. This article presents a failure analysis on a gasoline engine cylinder head made of aluminum alloy, which has been used in passenger cars. During an endurance test, a crack initiated from the interior wall of a hole in the center of the cylinder head and then propagated through the thickness of the cylinder head. The metallurgical examinations are conducted in the crack origin zone. The results show that there are many casting pores due to poor quality of casting in the failed cylinder head which has certainly played a crucial role in initiating the crack. Finite element analysis of the cylinder head is performed to identify the stress components. Modeling of a bolt for the hole shows that the plastic stresses are occurred. Moreover, the lower strength of the material due to high assembly stress caused the failure in the cylinder head
  6. Keywords:
  7. Crack ; Cylinder head ; Fatigue ; FEM ; SEM ; Cracked gasoline ; Endurance test ; Gasoline engines ; Metallurgical examination ; Plastic stress ; Stress component ; Automobiles ; Cracks ; Cylinder heads ; Fatigue of materials ; Finite element method ; Fractography ; Fracture mechanics ; Gasoline ; Scanning electron microscopy ; Strength of materials ; Failure analysis
  8. Source: Journal of Failure Analysis and Prevention ; Volume 12, Issue 3 , 2012 , Pages 286-294 ; 15477029 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs11668-012-9560-6