FIG. 3.

(Color online) Normalized maximum stress $\underset{\text{space}}{\text{max}}[\underset{\text{time}}{\text{max}}(T_{\text{max}})]/p_0$ in a stone as a function of dimensionless frequency ka varying stone composition: COD, MAPH, U-30, and COM. Arrows indicate the lowest resonance frequency for quasi-longitudinal standing waves in a thin rod with length equal to the stone diameter.