Plate impact investigation of the dynamic response of commercial tungsten carbide under shock-induced compression and combined compression-and-shear loading

Inelastic behavior of tungsten carbide at high pressures

“…However, experimental data shows that at higher pressures, this phenomenon actually diminishes, and eventually vanishes, with no sign of tension damage observed at high impact stresses. Recall the experimental records reported in [18] and shown in Fig. 8, resulted from an impact velocity of 92 m/s (~5 GPa).…”

“…Both features are captured using the calibrated JH2 model. In [18] the authors suggest this is an occurrence of failure, yet it is seen that the transverse velocity recovers later to higher velocities and that it does not further soften, as indicative of failure. Furthermore, at much higher impact velocities, (e.g., CK-1806), for which the initial compressive stresses are higher, the numerical simulation demonstrates that the observed behavior is related to damage due to tension, while maintaining the shear strength.…”

“…In a recent work [18], the results for WC are reported from PSPI experiments conducted at pressures below the HEL. Figure 8 depicts a numerical simulation using the calibrated JH2 model of shot #107 in [18], conducted at an impact velocity of 92 m/s. Distinct features are observed in the experimentally measured velocity profiles.…”

“…Figure 8. Normal and transverse velocity profiles obtained from velocimetry measurements for experiment #107 in [18] and numerical simulation with the calibrated JH2 model.…”

“…Frutschy et al [11,17] conducted symmetric PSPI experiments on pure WC at different temperatures and reported only a small deviation from the elastic response up to pressures of ~7 GPa. Following Frutschy's work [17], Zuanetti et al [18] conducted PSPI experiments at different temperatures with pressures up to 5 GPa. Experiments conducted at higher shear stresses, using larger skew angles, revealed fluctuations of the transverse (shear) signal, suggesting a possible failure in tension due to the interaction of the longitudinal wave reflected from the rear surface of the anvil plate, and the oncoming shear wave.…”