Research Papers: Gas Turbines: Structures and Dynamics

Modeling of Crack Growth With Dwell Time for Aero-Engine Spectra Loadings in a Ni-Based Superalloy

[+] Author and Article Information
Erik Storgärds

Division of Solid Mechanics,
Linköping University,
Linköping SE-58183, Sweden
e-mail: erik.storgards@liu.se

Kjell Simonsson, Sören Sjöström

Division of Solid Mechanics,
Linköping University,
Linköping SE-58183, Sweden

David Gustafsson

Siemens Industrial Turbomachinery AB,
Finspång SE-61283, Sweden

Tomas Månsson

GKN Aerospace Engine Systems,
Trollhättan SE-46181, Sweden

1Corresponding author.

Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 15, 2015; final manuscript received July 20, 2015; published online August 12, 2015. Editor: David Wisler.

J. Eng. Gas Turbines Power 138(1), 012501 (Aug 12, 2015) (6 pages) Paper No: GTP-15-1327; doi: 10.1115/1.4031155 History: Received July 15, 2015

Testing and simulation of aero-engine spectra with dwell times are reported in this paper. The modeling concept used is built on linear elastic fracture mechanics (LEFM) and provides a history-dependent evolution description of dwell damage and its interaction with cyclic load. The simulations have been carried out for three spectra: (1) cyclic loads, (2) combined sustained load and cyclic loads, and (3) slow load ramps and cyclic loads, all for surface cracks at 550 °C for Inconel 718. All simulations show reasonable good agreement with experimental results. Prediction of multiple tests of several batches is also provided to show statistical scatter.

Copyright © 2016 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Flight spectra tested: (a) cyclic spectrum, (b) sustained load spectrum, and (c) ramp spectrum

Grahic Jump Location
Fig. 5

Scatter including 95% confidence interval for (a) the damaged zone concept and (b) the superposition model

Grahic Jump Location
Fig. 4

Results for model prediction versus test

Grahic Jump Location
Fig. 3

The ramp spectrum with the crack closure function, where σ open  mem.c is the stored opening value

Grahic Jump Location
Fig. 2

The ramp spectrum applied with the history-dependent load counting technique




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In