Thermal fatigue analysis of cast aluminum cylinder heads

X. Su, M. Zubeck, J. Lasecki, C. C. Engler-Pinto, C. Tang, H. Sehitoglu, J. Allison

Research output: Contribution to journalConference articlepeer-review

Abstract

Thermal fatigue presents a new challenge in cast aluminum engine design. Accurate thermomechanical stress analysis and reliable failure criterion are the keys to a successful life prediction. It is shown that the material stress and strain behavior of cast aluminum is strongly temperature and strain rate sensitive. A unified viscoplasticity constitutive relation is thus proposed to simultaneously describe the plasticity and creep of cast aluminum components deforming at high temperatures. A fatigue failure criterion based on a damage accumulation model is introduced. Damages due to mechanical fatigue, environmental impact and creep are accounted for. The material stress and strain model and thermal fatigue model are shown to be effective in accurately capturing features of thermal fatigue by simulating a component thermal fatigue test using 3D FEA with ABAQUS and comparing the results with measured data.

Original languageEnglish (US)
JournalSAE Technical Papers
DOIs
StatePublished - 2002
Externally publishedYes
EventSAE 2002 World Congress - Detroit, MI, United States
Duration: Mar 4 2002Mar 7 2002

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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