Predicting the Effect of Compressive and Tensile Residual Stresses in Fracture Mechanics Specimens

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 pre-compressed 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 pre-loading as a means for introducing residual stress.

• Periodical: Advanced Materials Research (Volumes 89-91)
• Pages: 275-280
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.89-91.275
• Online since: January 2010
• Authors: S. Kamel, Robert C. Wimpory, Michael Hofmann, Kamran M. Nikbin, N.P. O'Dowd
• Keywords: Brittle Fracture, Compressive, Finite Element Analysis (FEA), Neutron Diffraction, Residual Stress, Tensile

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