Can Plastic Zones Be Deducted From Surface Profile Measurements at Crack Tips of Glass Specimens?
Theo Fett, G Rizzi, D Creek, Susanne Wagner, Sheldon M. Wiederhorn
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.
Physical Review Letters
atomic force microscopy, crack tips, finite element analysis, fracture, glass
, Rizzi, G.
, Creek, D.
, Wagner, S.
and Wiederhorn, S.
Can Plastic Zones Be Deducted From Surface Profile Measurements at Crack Tips of Glass Specimens?, Physical Review Letters
(Accessed December 7, 2021)