Wall Accident Reconstruction has handled numerous cases that involved analyzing rollovers, low and high speed collisions, whiplash injuries, tire failures, articulated vehicles, large trailer rear underride protection, accident avoidance, seat belt defense, injury prevention, construction zones, road defects, off-road driving, kinematic analysis, slip or trip and falls, and many other cases.
Vehicle accident reconstruction is the scientific process of investigating, analyzing, and determining the causes and events of a motor vehicle accident using principles of physics and engineering. The laws of physics such as the conservation of linear momentum, conservation of energy, and work-energy are the typical basis for the analysis. Vehicle accident reconstructionists are relied upon to determine what happened in an accident and why it happened. Vehicle accident reconstructionists perform detailed analyses to develop a sequential "history" of the vehicle accident that is consistent with physical evidence. The analytical procedure consists of a series of systematic steps such as reviewing documents, identifying technical issues, documenting the accident site, and conducting vehicle and component inspections. Results of a vehicle accident reconstruction typically include an analysis of the dynamic behavior of vehicles involved (speeds, accelerations and motions of the vehicle) as well as identifying the cause of the accident, contributing factors, and other potential issues.
Human Factors is the scientific discipline that is concerned with the interaction of people and devices of various kinds. At Wall Accident Reconstruction, the "devices" that we are primarily concerned with are motor vehicles and their operating environments, including traffic control devices. We also conduct analysis of pedestrian actions within different environments (Slip or trip and falls). The primary issues of concern are human capabilities and limitations as they relate to the roadway transportation system, including aspects of road and vehicle design that might contribute to accidents. Conditions like the surface conditions (is it slick, gritty; rural road or city road), environmental factors (glare, lighting, visibility), and control devises (markers, sign and signal devices, or warning devices) are among the factors that we consider in reconstructing the conditions during an accident.
Biomechanics is the branch of science that brings together knowledge of biology, physics, mechanics, and engineering to explain how living things move and function. In the realm of motor vehicle accidents, the field of biomechanics includes the scientific evaluation of occupant movement (kinematics) and loading (kinetics) during a dynamic event. A vehicle accident reconstruction provides an analysis of the vehicle dynamics during the accident, including how the vehicle moves and the forces it experiences. A biomechanical analysis of the event utilizes physics and the analysis of the vehicle dynamics to determine the motions and forces experienced by the vehicle occupants. The biomechanist applies knowledge of biological properties, composition, and tolerances of the structures of the human body along with evaluation of occupant movement and forces to assess questions related to the mechanics of injuries and injury potential. For example, in an injury causation analysis, biomechanics can be used to determine if the motions and forces experienced in a specific accident result in a mechanical environment that is consistent with a specific injury. A biomechanical analysis, along with medical evidence, an accident reconstruction, and evidence from vehicle and scene inspections, can also be used to answer questions related to the use and performance of vehicle restraint systems (airbags, seatbelts, child restraint systems), vehicle structures, and other vehicle components.
MADYMO™ This optional module that extends PC-Crash’s existing occupant simulation abilities with full FEA. MADYMO will calculate the dynamics of a standard crash test dummy during crashes simulated with PC-Crash.