Challenge

Project - 2 - Meshing on the suspension Assembly

EEquebal Ahmad14 Apr 2022

ANSA

Objective:- Do the following operation on the given model:-

a. Check the geometrical errors.

b. Mesh the component with the given quality criteria.

c. Assign thickness after meshing.

d. Use tetra elements for non uniform thickness component.

e. Use appropiate connections to connect the connections.

f. Use transform options to reflect the components on the other side.

Quality Criteria for Surface Meshing of Tyre and Rim (Element type: Tria) :

S.No	Quality Criteria	Value
1	Target/Average length	6.5
2	Minimum Length	5
3	Maximum Length	10
4	Skewness	45

Quality criteria for Surface Meshing of Non Uniform thickness components other than Tyre and Rim (Element type: Tria) :

S.No	Quality Criteria	Value
1	Target/Average length	4
2	Minimum Length	2
3	Maximum Length	6
4	Skewness	45

Quality Criteria for Volume meshing of all Non Uniform thickness components (Element type: Tetra Elements):

S.No	Quality Criteria	Value
1	Tet-collapse	0.2

Quality criteria for Mid surfacing of Uniform thickness part which has thickness less than 5 mm (Element type: Mixed elements) :

S.No	Quality Criteria	Value
1	Target/Average length	4
2	Minimum Length	2
3	Maximum Length	6
4	Aspect	3
5	Warpage	15
6	Skewness	45
7	Jacobian	0.7
8	Minimum Quad Angle	45
9	Maximum Quad Angle	135
10	Minimum Tria Angle	30
11	Maximum Tria Angle	120

PROCEDURE:-

STEP-1

Import the cad file to the ANSA.

STEP-2 :-

After importing the file go to mesh mode give length as 1 unit in perimeter option for cons resolution.

Then give TOPO if it is IGS file and orient for color resolution.

After all this complition go for geometry check.

STEP-3:-

Since the assembly is larger set the different-different PIDS for the component to get the operation smoothly.

STEP-4:-

Component 11 has thickness less than 5mm, for these component we have to extract the mid surface using offset method.

After extracting the mid surface assign the mesh parameter and quality criteria and the component.

STEP-5:-

For tyre and rim volume has to be performed,for that mesh the component as shell using tria element and given quality criteria and mesh parameter then go to volume mesh module select manual in the define option.Before move for volume mesh assign all the quality and collapse value.(Define-manual,then list-edit-rapid tetra element-then remesh).After meshing make sure collapse element must be improved(Improve-fix quality-visible).

STEP-6:-

In component 3,there is spring in the assembly that we have to represent as a 1d bar element.

For that extract the middle using middle commamd in the curve option.(curve-middle-first curve middle click-2nd curve middle click,then curve-connect-multi,then creat CoG point,after that go to deck module select CBAR elementthen select the curve and give middle click then select CoG point and assign the element length as 3mm then create the separate PID's for bar and spring and represent as solid through line representation in presentation parameter).