AMRC advances its residual stress measurement capability

01 September 2014

Researchers at the University of Sheffield Advanced Manufacturing Research Centre with Boeing have matured their capability for measuring residual stresses in high-value manufactured aerospace components.

Residual stresses can be produced and affected by a range of manufacturing processes, including heat treatment, machining, and surface treatments such as shot peening. The fatigue life of a component has a direct correlation to the residual stresses that it inherits during the entire manufacturing process, therefore understanding the evolution and interaction of residual stresses during the whole manufacturing chain is of utmost importance.

At the AMRC, measurement of the residual stresses helps our engineers to understand the overall surface integrity and the service life of components when newer, faster and more advanced manufacturing techniques are being developed. Key conventional techniques for measuring residual stresses include hole-drilling - a destructive technique that involves the use of strain gauges for measuring changes in surface strains due to relaxation of residual stresses as the hole is drilled to a range of depths. Recently, the AMRC's Residual Stress Measurement Group (RSMG) has matured its capability to use X-Ray Diffraction (XRD), a non-destructive to semi-destructive technique to measure residual stresses within the component.

XRD can provide more accurate results than hole-drilling, with better resolution for surface and near surface measurements up to a depth of around 100 - 200

Related News

AMRC becomes part of £60 million bid to explore and improve new manufacturing techniques
15/12/2016
The AMRC has been named a partner in three of the UK’s new Future Manufacturing …
3D scanner upgraded for automated composite inspection promises big benefits for aerospace and automotive industries
12/07/2018
A 3D optical scanner upgraded for the automated inspection of composites is being put …
State of the art skills harnessed by AMRC engineers to preserve Medieval history
27/07/2015
Engineers from the University of Sheffield's Advanced Manufacturing Research Centre ( …
AMRC Forum: large volume metrology
15/05/2013
Thursday 27 June, Nuclear AMRC.The latest AMRC Forum presents exclusive insight i …