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Study of the Failure Mechanisms of Ceramics by Numerical Analysis During

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Study of the Failure Mechanisms of Ceramics by Numerical Analysis During Low Velocity Impact of Protective Systems

 

Drop-tower experimentation is a common technique used to assess low velocity impact damage on ceramics.   However, numerical simulations at impact energies corresponding to experimental velocities between 2 and 5 m/s require extensive periods of time to produce results. This effort examines various ways of accelerating the numerical study by (a) increasing the impact velocity and (b) keeping the impact kinetic energy constant while decreasing the impactor mass.  This effort also examines the possible replacement of the drop-tower cylindrical impactor with a spherical impactor at various kinetic energies.  The failure mechanism of Al2O3 targets was studied by ANSYS/AUTODYN [1] commercial software and the results were compared to available experimental data from various nondestructive techniques.  Successful output of this modeling effort will provide useful information for assessment of damage propagation through targets used in protective systems by establishing acceptance criteria for future materials prior to fielding.

 

Authors: Costas G. Fountzoulas, Raymond E. Brennan

 

Conference: CAMX 2016 – Anaheim

 

SKU/Code: TP16-0078

 

Pages: 7




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