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THE EFFECTS OF A ROLLOVER ON THE BODY

THE EFFECTS OF A ROLLOVER ON THE BODY. Chris Caldwell ME 272 Final Project. OBJECTIVES. Build dummy and seat model. Insert into Nastran model of Car. Run Three simulations. Roll car on an axis. Cause rollover by colliding perpendicular with a 6” curb at 35 mph.

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THE EFFECTS OF A ROLLOVER ON THE BODY

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  1. THE EFFECTS OF A ROLLOVER ON THE BODY Chris Caldwell ME 272 Final Project

  2. OBJECTIVES • Build dummy and seat model. • Insert into Nastran model of Car. • Run Three simulations. • Roll car on an axis. • Cause rollover by colliding perpendicular with a 6” curb at 35 mph. • Cause rollover by hard right-hand turn with high tire friction.

  3. BUILDING DUMMY AND SEAT • Models are all built with SolidWorks. • All constraints are placed using mates in SolidWorks and then modified in Nastran. • Dummy is modeled after a 5’ 9” person, but had to be modified to 5’ 2” to fit into the car. • Four springs were added around the neck to stiffen its movement.

  4. Test 1 Rolling On An Axis • In Nastran a rotating constraint is applied to the center of the car’s frame. • The car will be given a velocity to produce one complete roll.

  5. Tests 2 & 3 • Rollover Caused by Curb: • The car will be given a velocity of 35 mph perpendicular to a 6” curb. • Rollover by turn and friction. • The car will be given a velocity of 35 mph and the tires will be rotated to the left or right. • Due to previous experience with car model, the friction on the road and tires needs to be high to cause a rollover.

  6. Results Results: • Tests have not been simulated, therefore no results. • In all three tests the seat beat and the torso of the dummy will be analyzed to find max stresses and stress concentrations.

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