Car Crash simulation

Objective:

Perform car crash simulation study using 3 different values of thickness for the car body and analyse the total deformation and Equivalent stresses acting on the model.

1. Analysis System: Explicit Dynamics
2. Material Properties:

Carboy Material: Stainless Steel NL

3. Mesh:

Triangles Method is used in meshing of car body

Face meshing of 225 mm is applied on Back faces of car body

Mesh Element Quality:

4. Analysis Setting

No of Steps: 1

Load Step Type: Explicit Time Integration

End Time: 0.001

5. Boundary Conditions:

• Fixed support is defined at back faces of car body

• Displacement of 500 mm is given to wall.

Result Plot:

Case_1 – Car body of wall thickness 0.3

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Case_1 – Car body of wall thickness 0.5

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Case_1 – Car body of wall thickness 0.7

Equivalent stress (Mpa)
Total Deformation
Equivalent plastic strain
Simulation Animation

Conclusion:

Sr. No	Result Plot	Case_1	Case_2	Case_3
1	Equivalent stress (Mpa)	8784.5	8789.9	8793.3
2	Total Deformation	934.29	933.18	931.52
3	Equivalent plastic strain	1.3773	1.4683	1.4547

1. It is observed that from above result table that Equivalent stress is almost same in all three cases.
2. And total deformation is also almost same in all three cases and slightly decreases as thickness value start increasing.
3. Equivalent plastic strain is greater in case 2 where wall thickness of car body is 0.5 mm.