Acknowledgements:Demonstration Grant from
EMDA; Rolls-Royce Power Engineering Ltd.
Contour Method (CM) is a recently invented technique for measuring residual stress in simple components,
such as a welded metal
plate. It involves making a through-cut in the sample of interest, measuring the subsequent relaxation profile on the cut surface and then using
this profile to
back-calculate a map of the original out-of-plane stress field. The CM is still in its infancy but has
huge potential for
development and application to complex engineering components large and small.
New Research Programme:
Advanced Contour Method Technology Programme was launched at the OU in October 2009.This research programme will improve the reliability of the basic technique, develop advanced tools that can be applied
to measure the state of
stress in a variety of complex geometry
components, and extend its applicability to other materials.The
work is underpinned by financial support from the East Midlands Development Agency (EMDA), The Open University and Rolls Royce Power Engineering Ltd, with in-kind collaborative support from Rotadata
(an SME based in Derby)
and GE Druck (manufacturer of MEMS
pressure sensors at Groby, East Midlands).