Vehicle Dynamics & Rollover Stability

Dr. David A. Renfroe has expertise in the manner which vehicles handle in adverse conditions such as during a tire delamination or blowout. He also has an understanding of the conditions causing a vehicle to rollover and the stability requirements necessary for the vehicle to be road worthy.

 

 

Dr. Renfroe has studied and tested vehicle traits, such as rollover propensity, suspension design, steering effects and mechanical failures and trailer towing handling.

The videos shown demonstrate the testing of roll propensity of a vehicle and the handling test of a vehicle with a delaminating tire.

 

Listed below are the technical papers we have published on the subject. Please contact us if you would like a copy of any of these publications.

• A Comparison of Computer Modeling To Actual Data and Video of A Staged Rollover Collision, Stuttgart, Germany.

• An Analysis Of The Mechanism Causing Loss Of Control During A Tire Delamination, Stuttgart, Germany.

• Solid Axle Tramp Response Near the Natural Frequency and its Effect on Vehicle Longitudinal Stability, Detroit, Michigan.

• Effects of the Process of Rear Tire Delamination on Vehicle Stability, Lyon, France.

• Designing for Vehicle Stability During Rear Tire Tread Separation Events, Chicago, Illinois.

• Vehicle Rollover Maximum Limits, International Journal of Vehicle Design.

• Second Order Metric for Rollover Propensity, SAE 2006-01-0799.

• Combining PC-Crash and MADYMO for Reconstruction and Occupant Motion During Rollover Crashes, Bratislava, Slovakia.

• Effects of Suspension Tuning on Off-Road Vehicle Operating Speeds Over Wavy Terrain and Occupant Endurance, Las Vegas, Nevada.

• Modeling of Occupant Motion and Airbag Interactions in Out Of Position Occupant Situations, Principia Scientia.

• Occupant Response to Rear Impact with Yielding Versus Stiffer Non-Yielding Seatbacks. 8th Annual International TNO Automotive MADYMO Conference, Paris, France.

• Occupant Motion Modeling in Rollover Accidents-Effects of Ellipsoid Surface Contact Characteristic Variations, Anaheim, California.

• Off-Road Vehicle Suspension Modeling:; A User Friendly Application for Suspension Component Selection, Dusseldorf, Germany.

• Effects of Surface Anomalies and Tire Mechanics on ATV Tire Friction Coefficients, SAE 631000.

• Simulation of a 3-Wheeled All-Terrain Vehicle (ATV) Transient and Steady-State Handling Characteristics, Journal of Commercial Vehicles.