Paper Title:
Crack FEA of the First Stage Blade of Gas Turbines
  Abstract

To investigate the physical cause of premature blade cracking during the acceleration mission test (AMT) in a test cell environment, an in-depth finite element analysis (FEA) of the blade was conducted using a life prediction system. The results obtained showed that the blades had suffered excessive airfoil creep damage, leading to excessive blade lengthening and airfoil untwisting particularly in the trailing edge region. It is predicted that the uneven rubbing action might have contributed to the fatigue crack nucleation and growth process just below the platform in the shank region of the blade under AMT fatigue cycling conditions, and the excessive creep deformation made a significant effect on the overall crack nucleation process.

  Info
Periodical
Edited by
Daizhong Su, Qingbin Zhang and Shifan Zhu
Pages
429-432
DOI
10.4028/www.scientific.net/KEM.450.429
Citation
P. Zhao, W. Li, Q. H. He, "Crack FEA of the First Stage Blade of Gas Turbines", Key Engineering Materials, Vol. 450, pp. 429-432, 2011
Online since
November 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yong Hui Xie, Di Zhang, Zhen Ping Feng
Abstract:Forced vibration and liquid corrosion are important reasons for last stage blade failure in steam turbine. In order to improve reliability...
613
Authors: Keun Bong Yoo, Han Sang Lee
Abstract:Many investigations about superalloys and coatings have been done in the laboratory, but evaluating the degradation condition of hot section...
2523
Authors: Keun Bong Yoo, Han Sang Lee, Doo Soo Kim
Abstract:Many investigations about superalloys and coatings have been done in the laboratory, but evaluating the degradation condition of hot section...
113
Authors: Jie Shao Xin
Chapter 2: Computer Aided Engineering
Abstract:This paper made an analysis on the process of turbine blade, and completed the three-dimensional design of milling and cutting fixture used...
369
Authors: Wei Qiang Zhao, Yong Xian Liu, Mo Wu Lu
Chapter 3: Computer Aided Design, Modeling and Analysis
Abstract:This paper introduces a FEA method for vibration characteristics analysis of an aero-engine shrouded turbine blade and makes an actual modal...
443