Computational Mechanics for ATV Safety

Chandra Thorbole, Ph.D.

ATV Safety SummitOctober 11th & 12th

Computational Mechanics in Crash Safety

Finite Element Methods

Multibody Dynamics

Occupant Protection

Video

ATV Safety SummitOctober 11th & 12th

Computational Mechanics for ATV Safety

Primary Prevention

Secondary Prevention

Rider Protection

Rollover stability &Handling

Characteristic

Injury Analysis andPrevention

ATV Safety SummitOctober 11th & 12th

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 SummitOctober 11th & 12th

Real World Accident Research

Rollover Type : Forward Flip

Rider + Passenger

Injury : Neck Injury (Spinal cord involved)

Injury Mechanism : The metal rack impactedthe neck.

ATV Speed 6mph

Front Wheels: Locked

ATV Safety SummitOctober 11th & 12th

Computational Mechanics for ATV Safety

ATV Computer Model

Rider Model

Terrain (Environment)

Model

Successful ATV RiderInjury Prevention

ATV Safety SummitOctober 11th & 12th

Computational Mechanics for ATV Safety

ATV Computer Model

ATV Safety SummitOctober 11th & 12th

Sensitivity Analysis -Evaluation

Initial Speed 10mphDeceleration for soil trip 0.5 sec

Response : Rear Axle Lift

Factors 1. No of people on ATV (Rider ,Passenger)2. Ground Slope3. Rider Grip Hold (Time)

Factor combination (All High Level)

ATV Safety SummitOctober 11th & 12th

Mechanics

Shift the moment about point “a”

Video

ATV Safety SummitOctober 11th & 12th

Evaluation

Video

ATV Safety SummitOctober 11th & 12th

Future Work

Rider Model for Injury Analysis&Helmet effectiveness

ATV Safety SummitOctober 11th & 12th

Thank You