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Projects: Projects for Investigator
Reference Number GR/S43764/01
Title A mechanical test for remanent creep life.
Status Completed
Energy Categories Not Energy Related 80%;
Other Power and Storage Technologies(Electric power conversion) 20%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr M Evans
No email address given
Swansea University
Award Type Standard
Funding Source EPSRC
Start Date 01 December 2003
End Date 30 November 2006
Duration 36 months
Total Grant Value £174,102
Industrial Sectors Energy
Region Wales
Programme Materials, Mechanical and Medical Eng
Investigators Principal Investigator Dr M Evans , Engineering, Swansea University (99.999%)
  Other Investigator Professor R Evans , Engineering, Swansea University (0.001%)
  Industrial Collaborator Project Contact , National Physical Laboratory (NPL) (0.000%)
Project Contact , GenExP Limited (0.000%)
Project Contact , RWE Innogy (0.000%)
Project Contact , Institute for Energy and Transport (IET), Joint Research Centre (JRC), Petten, The Netherlands (0.000%)
Web Site
Abstract The estimation of remanent life for high temperature plant is best performed through post exposure creep testing. Conventional creep specimens are large and their removal from components often destroys their useful service life. The small disc creep test eliminates this difficulty but the interpretation of the test results is difficult and at present entirely empirical. This research will properly characterise the mechanics of the disc creep test so that quantitative estimates of remanent lifecan be made. It will build a finite element model of the test, which will be verified using existing in house disc creep tests on virgin and creep damaged rotor steels. The model will be elastic-viscoplastic and will incorporate real creep properties obtained from the IRC (Swansea) data bank. A critical part of the model will be the inclusion of work hardening, thermal softening and Kachanov type damage accumulation. The accumulation rates will incorporate the effects of general three dimensional stress states.The model will then be used optimise the test conditions (geometry, surface conditions etc.) so that the test has the maximum sensitivity to pre-imposed levels of damage. The optimisation will be through Response Surface Methodology. The work will include an analysis of variability so that the effects of scatter can be estimated. The overall research will produce a auide to aood practice disc creep testing and will provide a quantitative methodology for remanent life estimation

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Added to Database 01/01/07