Hertzian cone cracks

Fig. 8. (a) Schematic of a Vickers indentation-induced Hertzian cone crack, (b) View from the bottom of an aluminosihcate glass block of a Vickers... 

Figure 6.12. Hertzian cone crack evolution and geometry (Lawn 1993).

Fig. 17 Contact mechanics analysis of Herztian cracks within brittle materials.a Schematic description of a Hertzian cone crack induced under normal indentation by a rigid sphere, b Reduced plot of JC-field as function of cone crack length and for increasing loads pf < p// < pm during sphere-on-flat normal indentation of brittle materials. Arrowed segments denote stage of stable ring crack extension from Cf to cc (initiation), then unstable to ci at P = P,n (cone-crack pop-in) (From [67]). Branches (1) and (3) correspond to unstable crack propagation (dK/dc > 0), branches (2) and (4) to stable crack propagation (dK/dc < 0)...

Fig. 17 Contact mechanics analysis of Herztian cracks within brittle materials.a Schematic description of a Hertzian cone crack induced under normal indentation by a rigid sphere, b Reduced plot of iC-field as function of cone crack length and for increasing loads pf p// p/// (tuj-ing sphere-on-flat normal indentation of brittle materials. Arrowed seg-...

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