News & Events-Leading structures experts present papers at Fatigue 2014

Leading structures experts Dr Roger Dennis and Dr Janet Wilson will be presenting papers at Fatigue 2014. Starting on the 3 March 2014 at the Melbourne Circket Ground, Fatigue 2014 Congress is the eleventh in a series of international congresses held since 1981, covering all aspects of fatigue of materials, components, vehicles and structures. For more details click here.


Brief synopses of the presentations is below:


Fatigue Life Enhancement and Experimental Techniques Session, Friday 7 March

Measurement and Numerical Prediction of Residual Stresses in Steel Welds Subject to Heat Treatment

Dr Roger Dennis will be presenting the results of an experimental programme and complementary computer simulation to characterise residual stresses in steel welds subject to post weld heat treatment. The fatigue life of welded structures is an ongoing matter of concern and focus of research in the field of structural integrity. In this research programme the neutron diffraction technique was used to investigate the residual stress distributions in carbon steel components. A parallel programme of detailed modelling was undertaken to assess the validity of the modelling techniques, when compared to measurements, and to provide full-field predictions of residual stresses for comparison with fitness-for-purpose methods.


Management of Fatigue and Reliability Session, Wednesday 5 March

Asset Integrity Management for Highly Fatigued Equipment

Dr Janet Wilson will be presenting a paper on an Asset Integrity Management programme in place for the UK Royal Navy submarine fleet. Submarine tailshafts are potentially at risk from environmentally assisted cracking, due to the combination of large numbers of rotating-bending fatigue cycles and the possibility of exposure to seawater. Submarine tailshafts are safety-critical items, whose failure can lead to a catastrophic loss of the vessel. Frazer-Nash carried out probabilistic life predictions, which concluded that cracks in key areas of the tailshaft must be detected before they reach a certain size. No existing technology could fulfil this requirement, so the team developed a novel inspection system that can be deployed remotely from inside the tailshaft. After a rigorous development and qualification programme, the system has been successfully deployed on three submarines.