Life-time analysis and design of powder metallurgy turbine disk

Zhenzhou Lu, Youliang Xu, Zhiguo Yang, Zhufeng Yue

Research output: Contribution to journalArticlepeer-review

Abstract

Based on boundary uncertainty theory, the service life of a powder metallurgy processed (PM) turbine disk has been analyzed. First, the general formulations are presented. The effects of the boundary uncertainty variables on PM disk life response are formulated mathematically by Taylor expansion based on the boundary uncertainty descriptions. In order to present the lifetime results (output), to a specified uncertainty a critical relative maximum deviation has been presented for the required bounds of the (input) variables. Using experimental data for the PW alloy FGH95, the boundary life of an FGH95 turbine disk has been derived. The two key bounded variables among all possible ones are chosen as an example, and the accepted jointed bounds for the two variables have been calculated to satisfy a specified fatigue life of more than 4000 cycle number. The example shows the advantage of the boundary uncertainty than the classic probability method and can be applied to a simple sample.

Original languageEnglish
Pages (from-to)87-90
Number of pages4
JournalXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume33
Issue number1
StatePublished - Jan 2004

Keywords

  • Life
  • Powder metallurgy turbine disk
  • Robustness
  • Uncertainty

Fingerprint

Dive into the research topics of 'Life-time analysis and design of powder metallurgy turbine disk'. Together they form a unique fingerprint.

Cite this