Hertzian fracture of Pyrex glass under quasi-static loading conditions

Erosion and Damage by Hard Spherical Particles on Glass

“…This sensitivity is represented in the range of values that is found in the literature for the proportionality constant in Auerbach's law [7][8][9] or in the range of indentation forces before a cone crack is initiated. 10 The experimentally observed transitions are well within the range of the constants found in the literature.…”

A coupled approach to predict cone-cracks in spherical indentation tests with smooth or rough indenters

“…In this concern, experimental results provide non-consistent trends depending on the indenter material. In the case of steel indenters, the critical load and the ring crack radius in the abraded cases were greater than on the as-received surfaces, as reported in (Conrad et al, 1979;Jyh-Woei et al, 1993;Lu et al, 1995;Mouginot and Maugis, 1985). Similarly, etching treatments in hydrofluoric acid of the glass surface increased the critical load P c with respect to the simply polished surface in (Hamilton and Rawson, 1970).…”

“…For both indenting geometries, the experimental tests showed that the ring-crack radius r 0 is always larger than the contact radius at the crack onset a c : the ratio r 0 /a c varies from 1.1 to 1.4 for the spherical indentation tests, and it is even higher for the flat punch. Moreover, the ratio r 0 /a c was found to be a decreasing function of the indenter radius R s (Conrad et al, 1979;Mouginot and Maugis, 1985).…”

Hertzian Fractures in the Sub-Dwyka Nooitgedacht Striated Pavement, and Implications for the Former Thickness of Karoo Strata Near Kimberley, South Africa

“…Hertzian stresses set up on pebble contacts in deformed conglomerates can also lead to dissolution (McEwen, 1981). In experimental studies, Hertzian fractures have also been produced in elastic materials by static or quasistatic loading (e.g., Warren, 1978;Conrad et al, 1979).…”