ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This article presents the first part of a study on the interaction between residual stresses and crackdriving force. Blunt notched CT specimens were pre-strained to introduce residual stresses at thenotch, where a crack is subsequently introduced. FE modelling is used to model the specimen preloadand pre-cracking. Modelling predictions are validated by two different methods. The totalpredicted surface residual strains are compared to image correlation measurements. The predictedresidual strains were measured using neutron diffraction, both before and after fatigue cracking. Theresidual strain profiles show good agreement with the 3D FE model in the far field but the peak strainsmeasured near the notch are smaller those predicted. This is a result of the low spatial resolution ofthe technique
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.524-525.77.pdf