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Nauman Sheikh Research Website |
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Following are some of my current research projects Box Beam Extruder
End Terminal An end terminal for box beam guardrail has been recently
developed. This terminal extrudes and flattens the box beam while deflecting
it away from the impacting errand vehicle. Box beam extruder has been
developed through extensive use of LS-DYNA finite element simulations and
several component level and full-scale crash tests.
Security Barriers
for High Impact Loads Several security barrier designs have been investigated for
high impact loads. Simulations were performed using LS-DYNA. For some of the
designs, concrete damage material model was incorporated in the simulations
to evaluate concrete failure under vehicular impact. Newly developed APTEKs Continuous Surface Cap Model (CSCM)
was used to predict concrete failure.
Hybrid Energy
Absorbing Reusable Terminal (HEART) HEART is a newly developed crash cushion to be used in highway
safety applications that will mitigate injuries to occupants of errant
vehicles. It is composed of corrugated plates of High Molecular
Weight/High-Density Polyethylene (HMW/HDPE),
supported on steel diaphragms, which slide on a fixed rail. HEART is a
combination of plastic and steel which forms a largely self-restoring and
largely reusable crash cushion. Consequently, HEART has a major cost
advantage over conventional crash cushion designs. HEART has been developed
through extensive use of finite element analysis with LS-DYNA and various
component level and full-scale crash tests.
Aesthetic Concrete
Barrier Design Guidelines A large parametric study using finite element simulations has
been conducted under NCHRP 22-19 project. The objective was to develop
preliminary design guidelines for aesthetic surface treatment of
safety-shaped median barriers. Simulations were conducted using 2000 kg
pickup truck model impacting rigid safety-shape median barriers at 100 mph
and impact angle of 25 degrees. Occupant Compartment Deformation (OCD) of the
truck was assessed using truck floorboard internal energy as a surrogate
measure.
Effect of Bridge Parapet Orientation on Vehicle Stability
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