loading rate according to homogeneous nucleation theory. [@Fisher1948; @Zeldovich1992] In contrast, the spall strength of the glycerol samples was seen to increase by a factor of 2.5 over a variation in strain rate of . Both Carlson [@Carlson1975] and Utkin [@Utkin2010] used models to show that the observed variation in the spall strength of glycerol with temperature and strain rate can be attributed to the fact that the loading rates in the experiments were on the same timescale as the relaxation time needed to reach the steady-state homogeneous void nucleation rate, rather than being caused by a heterogeneous viscous void growth mechanism. They claimed that for nearly pure liquids placed in tension at sufficiently high strain rates, the dominant mechanism which relieves tension and determines the spall strength of the liquid is the homogeneous nucleation of bubbles. [@Carlson1975; @Utkin2010] From the theoretical work of Fisher [@Fisher1948] and Zeldovich [@Zeldovich1992], the critical tension required to cavitate a liquid should be strongly affected by its surface tension, but only weakly related to its viscosity or the loading rate of the experiment, provided that the relaxation time needed to reach the steady-state void nucleation rate is much smaller than the loading rate. [@Carlson1975]

