All Categories : Technical White Papers : CAE and FEA Bookmark and Share

Title : A Finite Element Model for TBC Damage Detection and Lifetime Prediction
Company : SIMULIA
File Name : fe-model-tbc-damage-detection-lifetime-prediction-2008.pdf
Size : 128329
Type : application/pdf
Date : 27-May-2011

Rate This File
5 Stars
4 Stars
3 Stars
2 Stars
1 Star

Thermal Barrier Coatings (TBC) have been used for almost three decades for heat insulation in high-temperature components to increase efficiency. Reliable diagnostic techniques that are practical to implement are needed to identify the location and severity of degradation in TBCs to protect against premature TBC failure. Luminescence spectroscopy has been utilized in detecting early damage, as it exhibits monotonic changes in the spectral characteristics with damage. Nevertheless there is still no agreement on what are the best spectral parameters that indicate damage. A new Finite Element model is presented, which is used to make realistic predictions of TBC lifetime, from as-manufactured to critically damaged. The aim of the modelling is to accurately incorporate all observed behaviour for a specific coating while retaining computational feasibility. To simulate damage accumulation and delamination the finite element model has been used to run several thermal cycles during which nucleation, propagation and coalescence of cracks is incorporated. A variety of cracking scenarios have been studied. The stress field of the oxide layer determined by the finite element model is subsequently converted into luminescence spectrum. Each stress level is represented by a Gaussian-Lorentzian shape function and by adding all the different stresses within the probed volume, the whole spectrum is obtained. The predicted luminescence spectrum for several cracks is used to identify characteristic spectral features that can be employed to predict TBC lifetime.
User Reviews More Reviews Review This File
SolidCAM - Learn More

Editorial
Latest Blog Posts
Marcin SzymańskIMCADCafe Editorial
by Marcin SzymańskI
Industry Predictions for 2020 – VShaper
Jobs
GIS Developer for GeoDecisions at St. Charles, Missouri
Mid-Level Developer for GeoDecisions at Raleigh, North Carolina
Senior Level Developer for GeoDecisions at Raleigh, North Carolina
GIS Developer for GeoDecisions at Vienna, Virginia
Business Analyst for GeoDecisions at Raleigh, North Carolina
Dev/Ops Developer for GeoDecisions at O'Fallon, Illinois
Upcoming Events
AHR Expo at Orange County Convention Center West Building Orlando FL - Feb 3 - 5, 2020
Design & Manufacturing at Anaheim Convention Center Anaheim CA - Feb 11 - 13, 2020
PLASTEC West — The Proof Is in the Plastics at Anaheim Convention Center 800 W. Katella Avenue, Anaheim CA - Feb 11 - 13, 2020
Manufacturing Automation Asia at Singapore Singapore - Feb 20 - 21, 2020
Kenesto: 30 day trial
MasterCAM



Internet Business Systems © 2020 Internet Business Systems, Inc.
25 North 14th Steet, Suite 710, San Jose, CA 95112
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation GISCafe - Geographical Information Services TechJobsCafe - Technical Jobs and Resumes ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise