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ATV Safety Summit: Vehicle Tech Innovations - Computational Mechanics for ATV Safety

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Chandrashekhar Thorbole, Director of Thorbole Simulation Technologies presented this at CPSC's ATV Safety Summit Oct. 12, 2012. ATV crashes involving rollovers are mainly governed by factors such as an ATV’s dynamic characteristics, terrain properties, and rider performance. To develop successful safety strategies, ATV crash reconstruction requires detailed crash site surveys and proper understanding of injuries involved, which is often time consuming and costly. Computer simulation technology, widely used in various engineering fields to improve occupant protection features, could be applied to the field of ATV safety. The requirements of an accurate dynamic ATV model, ATD (Anthropomorphic Test Device) models, and terrain environment are essential for any successful ATV crash simulation. In order to successfully conduct sensitivity analysis to understand the most significant factors dictating injury outcomes the ATD must possess bio-fidelity of a bicycle or motorcycle rider, the ability to grip a handle bar, and have a human face profile in order to facilitate correct helmet fit. The Arkansas ATV Safety Research group has developed a computer model of an ATV which can be used to simulate crashes. Future injury simulations will be conducted utilizing a rider and passenger. Pending activities also involve the development of a child rider ATD model for child injury prevention education and the development of applications for testing ATV helmets.

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ATV Safety Summit: Vehicle Tech Innovations - Computational Mechanics for ATV Safety

  1. 1. Computational Mechanics for ATV Safety Chandra Thorbole, Ph.D.
  2. 2. Computational Mechanics in Crash Safety Finite Element Methods Occupant Video Protection Multibody Dynamics ATV Safety Summit October 11th & 12th
  3. 3. Computational Mechanics for ATV Safety Rollover stability & Primary Handling Prevention Characteristic Rider Protection Secondary Injury Analysis and Prevention Prevention ATV Safety Summit October 11th & 12th
  4. 4. ATV Rollover Types GAO-10-418 Report, “All-Terrain Vehicles-How they are used,crashes,and Sales of Adult-Sized Vehicles for Children’s Use”, April 2010. ATV Safety Summit October 11th & 12th
  5. 5. Real World Accident Research Rollover Type : Forward Flip Rider + Passenger ATV Speed 6mph Injury : Neck Injury (Spinal cord involved) Injury Mechanism : The metal rack impacted the neck. Front Wheels: Locked ATV Safety Summit October 11th & 12th
  6. 6. Computational Mechanics for ATV Safety ATV Computer Model Successful ATV Rider Rider Model Injury Prevention Terrain (Environment) Model ATV Safety Summit October 11th & 12th
  7. 7. Computational Mechanics for ATV Safety ATV Computer Model ATV Safety Summit October 11th & 12th
  8. 8. Sensitivity Analysis -EvaluationInitial Speed 10mphDeceleration for soil trip 0.5 secResponse : Rear Axle LiftFactors1. No of people on ATV (Rider ,Passenger)2. Ground Slope3. Rider Grip Hold (Time)Factor combination (All High Level) ATV Safety Summit October 11th & 12th
  9. 9. Mechanics Shift the moment about point “a” Video ATV Safety Summit October 11th & 12th
  10. 10. Evaluation Video ATV Safety Summit October 11th & 12th
  11. 11. Future Work Rider Model for Injury Analysis & Helmet effectiveness ATV Safety Summit October 11th & 12th
  12. 12. Thank You ATV Safety Summit October 11th & 12th

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