Week 11 Car Crash simulation

AIM:

To perform the parametric study for 3 different values of thickness for the car body

OBJECTIVE:

The video is provided for the car crash simulation for boundary condition and simulation setup, need to perform the parametric study using three different values of thickness for the car body in the explicit Analysis.

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.Tetrahedrons method was applied for the Wall and the back faces of car body was provided with the sizing of 150mm so as to reduce the mesh time and solver time.
. Under explicit dynamics tab, we set the analysis to 1 step with end time 1e-3s.
. Displacement of 500mm is given to the wall in the direction of Car .
. The parts of the care body which may not be harmed in the crash are fixed.
. Total deformation, Equivalent Stress and 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:
i.e 0.3mm,0.4mm and 0.5mm

MESH



FIXED SUPPORT



VELOCITY



RESULTS FOR THICKNESS 0.4MM

EQUIVALENT STRESS



TOTAL DEFORMATION



EQUIVALENT ELASTIC STRAIN



PARAMETRIC RESULT FOR 0.3,0.4 AND 0.5mm THICKNESS



COMPARISON

Case: Thickness	Eq. Stress (MPa)	Tot. Deformation (mm)	Equivalent Elastic Strain(mm)
Case 1: 0.3mm	11638	1029.4	0.058753
Case 2: 0.4mm	11608	1027.7	0.058601
Case 3: 0.5mm	11579	1025.2	0.058458

With thickness of 0.3mm stress and total defromation and strain is more.