Details of Grant 

EPSRC Reference:	GR/J56004/01
Title:	HIGH TEMPERATURE DESIGN OF COMPONENTS WITH RATCHETTING & DAMAGE DUE TO COMBINED CREEP & CYCLIC PLASTICITY
Principal Investigator:	Hayhurst, Professor DR
Other Investigators:	Dunne, Professor FP
Researcher Co-Investigators:
Project Partners:
Department:	Mechanical, Aerospace & Manufac Eng
Organisation:	UMIST
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 1993	Ends:	30 September 1996	Value (£):	158,936
EPSRC Research Topic Classifications:	Design Engineering
EPSRC Industrial Sector Classifications:
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Summary on Grant Application Form
The proposed research is an extension of a previous research, now published in leading international journals, on the design analysis of Slag Tap components, subjected to combined creep and cyclic plasticity damage due to thermal shock, to deal with components subjected to additional mechanical loadings. Materials data was collected, materials models established and computer-based design analysis techniques successfully researched and established for thermal loadings only. However, more research is needed to establish the vialbility of the techniques for use under the combined transient thermal and mechanical loadings found in power plant and gas turbines. The proposed research will extend the existing materials data base for copper to include non-zero mean mechanical loadings where damage due to ratchetting occurs. New material models will be established, and used with computer-based Continuum Damage Mechanics analysis techniques to predict the behaviour of the Slag Tap component subjected to thermal shock leadings with superimposed mechanical stressing over many thousands of cycles. The accuracy of the predictions will be checked using experiments to be carried out, with support from a Senior Experimental Officer, on model Slag Taps with combined transient thermal and mechanical loadings. Generiv methods for design-analysis will be established which can be used with other materials and component geometries.
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