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Car Rollover Test

Car Rollover Test. Name: Antonio Sevilla Course: ME 272 FEA Prof. Jose Granda Date: 12-20-06. Problem Statement. To determine the velocity at which a vehicle must be traveling to completely rollover after hitting a curve sideways. Parameters.

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Car Rollover Test

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  1. Car Rollover Test Name: Antonio Sevilla Course: ME 272 FEA Prof. Jose Granda Date: 12-20-06

  2. Problem Statement • To determine the velocity at which a vehicle must be traveling to completely rollover after hitting a curve sideways.

  3. Parameters • Test vehicle was constructed in Solidworks and then the model was transferred to Visual Nastran 4D for analysis. • A curb was placed in front of vehicle to get the vehicle to rollover. • Curb dimensions are 6” X 10” X 190” (H x W x L). • A velocity was applied to the center of mass of the vehicle. • Vehicle mass: 2000 lbm • Coefficient of friction: .5

  4. Simulation at V=15 mphClick on the picture(If video doesn’t play you can find the simulations in the video folder.)

  5. Simulation at V=20 mph (If video doesn’t play you can find the simulations in the video folder.)

  6. Simulation at V=25 mph (If video doesn’t play you can find the simulations in the video folder.)

  7. Results • From the simulations we can see that at V= 15 mph, the car only tilts a little but it does not flip. • At V=20 mph, the car flips on its side and then lands back on its wheels. Therefore, full rollover is not accomplished. • At V=25 mph, the car flips completely and lands on its roof. Complete rollover is accomplished.

  8. Results: Graphs • The following graphs show the velocity (top) and acceleration (bottom) of the vehicle vs time. • The results show how the Vx, Vy and Vz components of velocity and accel. change for a car traveling at 25 mph.

  9. Results: Von Mises Stress • The max. Von Mises stress on the front right suspension on the vehicle at 25 mph was 8.60X105 psi. • The picture to the right shows the suspension after the collision.

  10. Results: Von Mises Stress at 25 mph (left), 15 mph (top) and 20 mph (bottom)

  11. Conclusion • Given a vehicle with a mass of 2000 lbm, a coefficient of friction of .5 and a standard 6 inch curb, we find that it requires a velocity of 25 mph to cause the vehicle to completely rollover and land on its roof.

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