Week 11 Car Crash simulation

AIM: The main aim of this week challenge is to perform a explicit dynamic simulation of a car crashing into the wall.The analysis is performed for three cases for different thickness of body panel.Then compare the results of the stress,strain and deformation plots with a detailed explanation for the plots.

PROCEDURE:

step 1: Open the ansys workbench module and select the transient structural analysis.

step 2: Now open the engineering data and add stainless steel non alloy material.

step 3: Right click the geomentry tab and select import geomentry --> browse --> select the file --> open.

step 4: Now open the geomentry in mechanical modeller.

step 5: Now assign the material for car body.

step 6: Now mesh the component.

step 7: Delete the existing contact and create an body interaction between the wall and car

step 8: Now create a symmentry region for both the wall and car body.

step 9: Now cange the analysis settings.

step 10: Now apply the necessary boundary conditions.

step 11: Now run the simulation.

step 12: Now include the total deformation,Equivalent stress and strain in output files.

step 13: Now parametrize the body thickness along with total deformation and equivalent stress.

step 14: Now give addition design points of .5mm and .7mm thickness of body panel and evaluate the design points.

OUTPUT REQUEST:

CASE 1:

CASE 2:

CASE 3:

CONCLUSION:

body thickness	Equivalent stress		Total deformation		Plastic strain
	min	max	min	max	min	max
0.3	0	3306.234	0	1041.407	0	0.02837
0.5	0	3740.104	0	1038.202	0	0.0378
0.7	0	3493.996	0	1035.2	0	0.03182

Based on the above result we can infer that the equivalent stress is maximum in case 2 than the other two cases. The maximum stress point is same for case 2 and case 3 but the maximum stress point is different for case 1.

The total deformation is maximum for case 1 and the total deformation is minimum for case 3 but in all the three cases the total deformation are almost the same for all the cases.The plastic deformation is also maximum in case 2 but it is minium in case 1.