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Can Plastic Zones Be Deducted From Surface Profile Measurements at Crack Tips of Glass Specimens?

Published

Author(s)

Theo Fett, G Rizzi, D Creek, Susanne Wagner, Sheldon M. Wiederhorn

Abstract

In recently published investigations the question was discussed whether a nonelastic material behaviour at glass tips can be deduced from displacement measurements at the side surfaces of fracture mechanics test specimens. Such measurements carried out with atomic force microscopes exhibit a finite depression around the intersection region of crack and free surface. We carried out 3-dimensional finite element computations under assumption of pure linear-elastic material behaviour and obtained excellent agreement with the measured data. From these results it could be concluded that the measurements from literature are a proof for presence of linear-elastic material behaviour but not for nonlinear or plastic effects.
Citation
Physical Review Letters

Keywords

atomic force microscopy, crack tips, finite element analysis, fracture, glass

Citation

Fett, T. , Rizzi, G. , Creek, D. , Wagner, S. and Wiederhorn, S. (2021), Can Plastic Zones Be Deducted From Surface Profile Measurements at Crack Tips of Glass Specimens?, Physical Review Letters (Accessed December 7, 2021)
Created October 12, 2021