Inelastic stress analysis and failure prediction of the turbine housing in engine motoring tests

Bok Lok Choi, Byoung-Ho Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to predict the thermomechanical failure of the turbine housing, it is essential to consider temperature-dependent inelastic materials undergoing thermal cyclic loads and to obtain the transient temperature distributions. This paper presents the analysis methods to calculate the thermal stresses and the plastic strain ranges for prediction of the fatigue life. The presented work is based on the engine motoring mode test that is commonly used for accelerated engine endurance tests. The results showed that the localized critical regions coincided well with the crack locations identified on the basis of a thermal shock test. The plastic strain values were predicted to lie within the range 0.216-0.396% corresponding to a range of 628-1450 cycles for 1600 target cycles.

Original languageEnglish
Pages (from-to)855-863
Number of pages9
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Volume230
Issue number6
DOIs
Publication statusPublished - 2015

Fingerprint

Stress analysis
Plastic deformation
Turbines
Engines
Cyclic loads
Thermal shock
Thermal stress
Durability
Temperature distribution
Fatigue of materials
Cracks
Temperature
Hot Temperature

Keywords

  • kinematic hardening
  • plastic strain range
  • thermal shock cycle
  • thermomechanical fatigue
  • Turbine housing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering

Cite this

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title = "Inelastic stress analysis and failure prediction of the turbine housing in engine motoring tests",
abstract = "In order to predict the thermomechanical failure of the turbine housing, it is essential to consider temperature-dependent inelastic materials undergoing thermal cyclic loads and to obtain the transient temperature distributions. This paper presents the analysis methods to calculate the thermal stresses and the plastic strain ranges for prediction of the fatigue life. The presented work is based on the engine motoring mode test that is commonly used for accelerated engine endurance tests. The results showed that the localized critical regions coincided well with the crack locations identified on the basis of a thermal shock test. The plastic strain values were predicted to lie within the range 0.216-0.396{\%} corresponding to a range of 628-1450 cycles for 1600 target cycles.",
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AB - In order to predict the thermomechanical failure of the turbine housing, it is essential to consider temperature-dependent inelastic materials undergoing thermal cyclic loads and to obtain the transient temperature distributions. This paper presents the analysis methods to calculate the thermal stresses and the plastic strain ranges for prediction of the fatigue life. The presented work is based on the engine motoring mode test that is commonly used for accelerated engine endurance tests. The results showed that the localized critical regions coincided well with the crack locations identified on the basis of a thermal shock test. The plastic strain values were predicted to lie within the range 0.216-0.396% corresponding to a range of 628-1450 cycles for 1600 target cycles.

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