Car Rolling 101 Beaudy Sheckler Jeff Powers ME 115 Professor Granda

The Purpose… The Purpose of the project was to construct a life-like simulation of a 3-D person in a rolling vehicle. The Purpose of the project was to construct a life-like simulation of a 3-D person in a rolling vehicle.

The Plan… Make a model of a mid-sized sedan using solid works. Make a model of a mid-sized sedan using solid works. Import this model into Nastran 4-D for analysis on car body. Import this model into Nastran 4-D for analysis on car body. Construct a person (female) to drive the sedan in solid works. Construct a person (female) to drive the sedan in solid works. Place the person in the car and analyze the forces experienced by her. Place the person in the car and analyze the forces experienced by her.

Revisions… Initially, a lotus Elise was constructed and used for the model, but after long compilation time due to filets and realistic suspension, the model was simplified to a sedan. Initially, a lotus Elise was constructed and used for the model, but after long compilation time due to filets and realistic suspension, the model was simplified to a sedan. The initial crash dummy was a male, but due to size constrictions, could not fit in the vehicle. The initial crash dummy was a male, but due to size constrictions, could not fit in the vehicle.

Implementation… Knowing the solid works applications, a sedan was constructed through a series of cuts and extrusions. Knowing the solid works applications, a sedan was constructed through a series of cuts and extrusions. The female driver was made through a series of mates and constraints on cylinders and spheres. The female driver was made through a series of mates and constraints on cylinders and spheres. The files were opened in Nastran 4-D and constraints were re-applied. The files were opened in Nastran 4-D and constraints were re-applied.

The Simulation… Initially we tested the effects of a car landing on its roof in Working Model 2D Initially we tested the effects of a car landing on its roof in Working Model 2D A series of Nastran constraints composed the sedans suspension, and the female dummys joints were modeled after rudimentary human anatomy, wearing a lap belt. A series of Nastran constraints composed the sedans suspension, and the female dummys joints were modeled after rudimentary human anatomy, wearing a lap belt. After finalizing the drawings and constraints, the real world properties were applied (ie: 9.81 m/s*s for gravity, collision, material properties, etc.) After finalizing the drawings and constraints, the real world properties were applied (ie: 9.81 m/s*s for gravity, collision, material properties, etc.)

Working Model 2D

Working Model 2D

Results… After hours of rendering, the final simulation shows the impact on the human as the sedan rolls over. The sedan was traveling approximately 60 mph, when it hits the slanted curb at a 45 degree angle. The impact broke the suspension and lost the rear left tire as a result.

Ariel Shot of Flipping…

Right Side View of flipping…

Collision Close-up…

Wide Angle Finale…

Front View of flipping…

Sedan Body Acceleration Graph…

Impulse Between Dummy and Sedan…

Sedan Removed…

Person Contact Impulse…

Front View…

High Quality Front View…

Rag doll effect…

Questions? For any assistance, please raise your hand and your question(s) will be addressed in the order of relevance. For any assistance, please raise your hand and your question(s) will be addressed in the order of relevance. (Decisions of relevance will be determined by group members) (Decisions of relevance will be determined by group members)