Kamel, S.; Wimpory, R.; Hofmann, M.; Nikbinn K.M.; O'Dowd, N.P.: Predicting the effect of compressive and tensile residual stresses in fracture mechanics specimens. Advanced Materials Research 89-91 (2010), p. 275-280
10.4028/www.scientific.net/AMR.89-91.275
Abstract:
This paper considers the prediction of the effects of tensile and compressive residual stress in fracture mechanics specimens by the application of a mechanical pre-load. This is considered in the context of a ‘C’ shape specimen which is mechanically pre-tensioned or precompressed to produce, respectively, a compressive or tensile residual stress in the region where the crack is introduced. Finite-element analysis is performed to simulate the pre-loading and the subsequent fracture loading of the cracked specimens. The finite-element predictions are compared with experimental data including residual stress measurements using neutron diffraction. A discussion is presented on modelling and material issues pertaining to the use of mechanical preloading as a means for introducing residual stress.