Approximately half of all numerical problems in crashworthiness analysis involve impact dynamics, and accurate contact algorithms are critical to capture the structures’ behavior. Conventional contact algorithms use the principle of preventing ‘ slave ’ nodes from penetrating ‘master’ segments....
In this research development of a steering collision avoidance system was investigated. First, different control approaches to perform an evasive collision avoidance maneuver using active steering was presented. Both linear and nonlinear controllers to control the combined lateral and...
The work presented in this dissertation describes a general algorithm and its Finite Element (FE) implementation for performing concurrent multiple sub-domain simulations in linear structural dynamics. Using this approach one can solve problems in which the domain under analysis can be...
AbstractDevelopment of A Generalized Isotropic Yield Surface for Pressure Insensitive Metal Plasticity Considering Yield Strength Differential Effect in Tension, Compression and Shear Stress StatesDue to effects of twinning and texture evolution, the yield surface for hexagonal close packed (HCP)...
Multiple Frontal Impacts: Prevention, Prediction and ProtectionAs the sophistication and effectiveness of safety devices have increased over the years, safety engineers have begun to look beyond the crash itself. While work has continued on traditional devices such as airbags and seatbelts,...
Run-off road crashes comprise about one third of traffic fatalities. Roadside and median safety barriers are installed to safely contain or redirect the colliding vehicles in these crashes where applicable. They are intended to minimize the impact severity and the resulting injuries or...
The objective of this work is to evaluate thoracic injuries for restrained occupants in far-side rollover and to propose a dynamic rollover test device. Most rollover studies have been driven by litigation and mainly focused on head and spinal injuries, while thoracic injuries, which correspond...
This thesis is part of current research at Center for Intelligence Systems Research (CISR) at The George Washington University for developing new in-vehicle warning systems via Brain-Computer Interfaces (BCIs). The purpose of conducting this research is to contribute to the current gap between...
Roadside hardware devices play an important role in vehicle safety, they redirect vehicles, reduce their speed and absorb impact energy. All roadside hardware devices have to undergo extensive testing procedures in order to validate and guarantee their performance. In order to reduce costs and to...
Cable barriers are an alternative safety countermeasure to rigid or semi-rigid barriers (Guardrails, Concrete Barriers, etc.) for run-off-road crashes on highways with moderate to light traffic flow. Due to their low installation cost and reduced impact severity, the State DOTs have installed...