A Computational Comparison of High Strain Rate Strength and Failure Models for Glass
ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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Computational studies are performed using the recent Holmquist-Johnson glass model and the earlier Johnson-Holmquist brittle material model. Although the JH-2 model has been adapted to provide reasonably accurate predictions for soda-lime glass, the Holmquist-Johnson model was developed specifically to replicate the behaviors of glass. Simulations of rod impact on borosilicate glass using these two models are compared to experiments involving impact of mild steel rods and borosilicate glass at ca. 540 ms. The material constants were adjusted to attain similar strength and damage responses at this impact velocity. In this manner, some light can be shed on the difference in the mechanisms of these two models. The models are compared and contrasted in penetration-time, penetration resistance, dwell, and the evolution of visual damage phenomena. The limitations of both models are discussed and the need for more experimental data to corroborate simulations is apparent.
- Ceramics, Refractories and Glass