Affiliations: Karagozian & Case, 2550 N. Hollywood Way, Suite
500, Burbank, CA 91505, USA | Century Dynamics, Inc., 1001 Galaxy Way, Suite 325,
Concord, CA 94520, USA
Note: [] Corresponding author: David Bogosian, Applied Research
Associates, 1055 E. Colorado Blvd., Suite 500, Pasadena, CA 91106, USA. Tel.:
+1 626 204 4010; E-mail: dbogosian@ara.com
Abstract: Modeling steel casing fragment impacts on hollow CMU poses some
problems, since the fragments will typically penetrate through the front face
and may also penetrate the back face. Techniques are needed for predicting (a)
the size of the hole created by the penetration, (b) the size of the annular
region of damaged concrete around the hole, and (c) the residual velocity of
the fragment. A series of calculations using the AUTODYN code were performed to
investigate the accuracy and reliability of the model. The model uses the
smooth particle hydrodynamics (SPH) approach to represent the CMU. A variety of
steel fragment sizes were projected at a layer of CMU, and the resulting hole
size, damage, and fragment residual velocity were tabulated. Results were
validated against existing empirical relationships to insure the model's
applicability, while additional analyses demonstrated trends and parametric
sensitivity.
