Week 11 Car Crash simulation
Car Crash Simulation Report
Aim: For this challenge, you will have to perform a parametric study using 3 different values of thickness for the car body. You need to apply the same conditions as mentioned in the video that corresponds to this challenge. Analyse the total deformation and Equivalent stresses acting on the model.
Procedure:
- Select Explicit Dynamics, drag and drop into Project Schematic.
- Stainless Steel NL is chosen under Engineering Data.
- Under geometry tab, import the given geometry, double-click to open Space Claim to register the model.
- Under geometry tab, the Car Body was given to be made of Stainless Steel NL with thickness of the mesh as a parameter.
- Symmetry was given to the wall face as well as the edge of the car body.
- Body Interactions were set to frictionless.
- Mesh size was set to default and meshed.
- Under explicit dynamics tab, we set the analysis to 1 step with end time 1e-3s.
- Displacement of 500mm is given to the wall.
- The parts of the care body which may not be harmed in the crash are fixed.
- Total deformation, Directional Deformation (along X axis) and Equivalent Stress plots are requested from the solver as outputs.
- Run the simulation by clicking on “solve”.
- The parametrized thickness of car body mesh is changed to evaluate results for various cases:
Case 1: 0.3mm
Case 2: 0.4mm
Case 3: 0.5mm
Case 1: 0.3mm thick car body mesh
Total Deformation:
Eq. Stress:
Directional Deformation (X axis):
Case 2: 0.4mm thick car body mesh
Total Deformation:
Eq. Stress:
Directional Deformation (X axis):
Case 3: 0.5mm thick car body mesh
Total Deformation:
Eq. Stress:
Directional Deformation (X axis):
Conclusion:
From the above simulations, here is the inference:
|
Case: Thickness |
Eq. Stress (MPa) |
Tot. Deformation (mm) |
Directional Deformation X-axis (mm) |
|
Case 1: 0.3mm |
13152 |
1039.9 |
56.504 |
|
Case 2: 0.4mm |
13153 |
1038.5 |
55.427 |
|
Case 3: 0.5mm |
13154 |
1037.1 |
54.668 |
We can observe that the deformations in case 3 is the least as the thickness is maximum.