Week 11 Car Crash simulation

Objective:

To Perform a parametric study using 3 different values of thickness for the car body and simulate for the same to find total deformation and equivalent stress.

Procedure:

* Open ANSYS Work bench, from the analysis systems drop the Explicit Dynamics in Project schematic.

* Select required material from materials tab, In our case we need stainless steel NL for Car body and alocate the same for car body.

* Import Geometry and open in design modular to check the geometry. Open in Mechanical module and rename the parts (if required) for easy identification purpose.

*Give the thickness to car body as 0.3mm in the first case.

* Delete default contact created by ansys, in explicit dynamics we dont need any contacts.

* Create the mesh which is generated by ansys as default. ( for my PC having that compitance only)

* In the analysis settings give the end time as 0.001s, and remaining settings keep as it is.

* Insert fixed support for the car body and select few faces which are not affectd during simulation.

* Insert displacement force for the wall and give 500mm dispacement towards car body.

* Here we have to assume car body is full, and also wall. So that apply symmetry region for both wall and car remaining body.

* Insert Output requirements are Equivalent stress and total deformation to analyse and click on solve to start simulation.

Results: Case1- 0.3mm body thickness.

Total deformation:

Equivalent stress:

Case2- 0.6mm body thickness

Total deformation:

Equivalent stress:

Case3- 1mm of body thickness:

Total deformation:

Equivalent stress:

Car Body Thickness	Total Deformation	Equivalent stress
0.3 mm	917 mm	3341.5 MPa
0.6 mm	1031mm	4873.4 MPa
1 mm	1024 mm	4870.1 MPa

Parametric study has been conducted sucessfully.

Conclusion:

At 0.6mm thicknessof car body, total deformation and Equivalent stress is more.