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HomeKey Engineering MaterialsKey Engineering Materials Vol. 560Extent of the Surface Region in Notched Middle...

Extent of the Surface Region in Notched Middle Cracked Tension Specimens

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Abstract:

This article aims at evaluating the extent of the surface region in notched Middle Cracked Tension specimens. Firstly, a fully automatic fatigue crack growth technique is developed to obtain stable crack shapes. After that, the stress triaxiality along the crack front is evaluated for different notch shapes. Then, objective criteria are defined to quantify the extent of the surface region from the stress triaxiality data collected. Next, the extent of the surface region is related to the elastic stress concentration factor of the uncracked geometry by a linear relationship. Finally, empirical two-constant equations able to evaluate the extent of the surface region from the thickness, notch radius, notch depth and elastic stress concentration factor are formulated.

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Periodical:

Key Engineering Materials (Volume 560)

Pages:

107-127

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.560.107

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Online since:

July 2013

Authors:

R. Branco, F.V. Antunes, J.D. Costa

Keywords:

Crack Shape Evolution, Extent of Surface Region, Fatigue Crack Growth (FCG), Stress Triaxiality

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