Measurements and predictions of steady-state and transient stress distributions in a diesel engine cylinder head

Kyo Seung Lee, Dennis N. Assanis, Jinho Lee, Kwang Min Chun

Research output: Contribution to conferencePaper

7 Citations (Scopus)

Abstract

A combined experimental and analytical approach was followed in this work to study stress distributions and causes of failure in diesel cylinder heads under steady-state and transient operation. Experimental studies were conducted first to measure temperatures, heat fluxes and stresses under a series of steady-state operating conditions. Furthermore, by placing high temperature strain gages within the thermal penetration depth of the cylinder head, the effect of thermal shock loading under rapid transients was studied. A comparison of our steady-state and transient measurements suggests that the steady-state temperature gradients and the level of temperatures are the primary causes of thermal fatigue in cast-iron cylinder heads. Subsequently, a finite element analysis was conducted to predict the detailed steady-state temperature and stress distributions within the cylinder head. A comparison of the predicted steady-state temperatures and stresses compared well with our measurements. Furthermore, the predicted location of the crack initiation point correlated well with experimental observations. This suggests that a validated steady-state FEM stress analysis can play a very effective role in the rapid prototyping of cast-iron cylinder heads.

Original languageEnglish
DOIs
Publication statusPublished - 1999 Dec 1
EventInternational Congress and Exposition - Detroit, MI, United States
Duration: 1999 Mar 11999 Mar 4

Other

OtherInternational Congress and Exposition
CountryUnited States
CityDetroit, MI
Period99/3/199/3/4

All Science Journal Classification (ASJC) codes

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

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    Lee, K. S., Assanis, D. N., Lee, J., & Chun, K. M. (1999). Measurements and predictions of steady-state and transient stress distributions in a diesel engine cylinder head. Paper presented at International Congress and Exposition, Detroit, MI, United States. https://doi.org/10.4271/1999-01-0973