Rollover Simulation using EDEM-MS Two-way Coupling
Altair EmployeeA rollover or overturn is a type of vehicle crash in which a vehicle tips over onto its side or roof. Rollovers have a higher fatality rate than other types of vehicle collisions. Rollovers are classified into two types:
- Un-tripped rollover
- Tripped rollover
Un-tripped rollover:
These are relatively rare events that may result from a high lateral frictional force between the tires and the road
Tripped rollover:
These are the result of a lateral force that may be caused by a tire or wheel digging into the road or from striking a curb or ground or other obstacles. This test is used
- To study roof crush strength
- Development of occupant protection system
- To Improve performance of restraint system
Key Points to be Noted:
- Soil Material chosen for rollover simulation is non-calibrated
- Vehicle model chosen from MotionSolve library
- Tripped rollover is demonstrated in this exercise
Simulation Methodology:
EDEM + MotionSolve (MS) is used to solve rollover, and the following methodology is adopted to demonstrate:
- Altair EDEM is chosen to model soil bed
- Soil bed is generated using Volume packing
- Full vehicle is modeled using Altair MotionSolve vehicle library
- Vehicle is tripped with an Initial velocity of 60 Kmph, 40 Kmph, and 25 Kmph over a soil bed
EDEM Simulation Setup:
MotionSolve Simulation Setup:
Simulation Results:
Roll Velocity:
Roll Angle:
Simulation Files:
EDEM and MotionSolve simulation setup is uploaded in the below location:
EDEM Simulation Deck:
MotionSolve:
Summary:
Altair EDEM+ MotionSolve simulation for tripped rollover allows to:
- Model virtual rollover test beds quickly and easily
- Obtain realistic interaction of soil bed to vehicle forces
- Reduce dependency on physical prototyping and in turn reduces overall design cycle time
- Improve vehicle design to reduce the likelihood of rollover
- Increase the occupant safety
If you are looking for further information on EDEM or other Altair products we have plenty more on the Altair Community: