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The manuscripts contained during this factor of Ceramic Engineering and technology complaints have been chosen from one of the greater than seventy shows on the Armor Ceramics Symposium. The discussions are divided into 3 sections: Modeling and dynamic habit, obvious fabrics, and Opaque fabrics. performed through the 36th annual foreign convention on complicated Ceramics and Composites (ICACC), this occasion is among the leading worldwide meetings for the most recent advancements within the fabrication, characterization, and alertness of ceramic fabrics to satisfy the wishes of the army, police, and different public safeguard, safety, and safeguard organizations.

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A gold rod was used to eliminate effects of projectile strength. The experimental diagnostics were flash radiography and high-speed photography. 20 · Advances in Ceramic Armor VIII Constitutive Characterization and Simulations of Penetration into Thick Glass Targets The target was backlit by a bright light source. It was observed that the glass became opaque, as shown in the left-hand images of Fig. 2, as the rod penetrated the glass. , the damaged glass does not transmit light since the light is scattered off the many cracks and comminuted glass.

A constitutive model is required to provide the strength in terms of the hydrostatic pressure. Two constitutive models can be used to describe the response of the failed material: Drucker-Prager" and Mohr-Coulomb12. 13 The MC model has advantages over the DP model. The MC model predicts a preferred direction of failure (that is, the failure angle) since it incorporates the Ji Advances in Ceramic Armor VIII · 23 Constitutive Characterization and Simulations of Penetration into Thick Glass Targets stress invariant into the constitutive formulation.

Consequently, the model development has to rely on extrapolating the data from the projection on the axial stress axis. Similarly, non-proportional loading data (such as with the pre-compressed case) and combined pressure-shear data are rare. More than two data points are needed to establish any trend in the failure curve. Finally, in situ measurement of sound speed behind the "damage" front would help quantify damage evolution by studying reflected amplitudes. REFERENCES 1 Z. Rosenberg, "On the shear strength of shock loaded brittle solids," J.

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