Project - 2 - Meshing on the suspension Assembly

Aim:

In this project check the geomtry errors and mesh the geomtry and take volue of the given rear suspension.

Given data:

Geometry

Given quality criteria:

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:

 ¬ Import the geometry , check and clean up geometry and clear the errors.

 ¬ Check the geometry eroors

 ¬ Clear all errors select the errors and right click select fix option its done.

Meshing:

¬  Going to mesh the tyre.

¬ Separted the type part start meshing.

¬ Go to model browser add the tyre part .

¬ Then go to batch mesh add new meshing scenario add the tyre part.

¬ Now assign the mesh parameter>

¬Then asssign the quality parameter as given in question.

¬ Now click the Run button to generate the mesh.

¬ The whole components meshed using tria elements.

¬ clear all the quality issues.

Volume Mesh:

¬ Before volume mesh go to assign quality criteria for volume.

¬ After assign the quality go to start the tetra mesh.

¬ In tetra mesh first define the components to be volume.

¬ This id done by volume mesh- volume - define -manual option.

¬ Then select the components and defined the part.

¬ After mesh the components create the PID for solid.

¬ volume mesh created for tyre part.

 ¬ similar to do for  all the parts as well.

 

¬ create volume for all the non uniform parts in the components.

Mesh the uniform components:

¬In this model it has only two uniform components 

¬ Now take midsurafce  and meshed the components.

¬ Assign the quality criteria for uniform components.

¬ after comple the meshing the components assign the thickness of the components.

1D meshing for spring:

¬ In spring type parts used 1d mesh  method to slove this.

¬ First go to Topo - curve- middle used to cretae the curve full compnents of the spring.

¬Then created curve have multiple curve converted into single curve.

¬ Then create 3d point go to topo-point-oncog-edge .

¬ 1d spring create using nastran deck -elements -cbar .

¬ Open windows select area choose the spring radius then it converted into 1d  part

¬ after created 1d part go to quality parameter-presentation parameters- line element crossection

¬ choose as solid.

Connection:

¬ Now going to conncect various part.

¬ Connecting the Rim disc brake assemble are connected through the bolt connection method.

¬ Like wise other parts where need bolt connection required its done by using the RBE2 method.

¬ Now go to Nastran deck -RBE2- many nodes and select the area and rightbody connection its done.

¬ In some required seam weld connection.

¬First create line curve using FEAt2curve option in Topo.

¬ Then using connection manager select the curve , open window go to overlap shell joint.

¬ then select p1 and p2 value its done.

¬ seam weld joint its done.

¬ Then where ever connection needed it would be completed through rigit joint method.

Symetry :

¬ Intially give half portion of the rear assembly and done all the works.

¬ Using symetry option to create another half as slimilar to this components.

¬ Go to utlities- tranform- select copy option and the entites go symetry.

¬ choose the 3 point method.

¬ Select the 3 points where it to symetry .

Learning outcomes:

¬ Check geometry and clear all the errors.

¬ learn to take mid surface of components .

¬ lear to identify the uniform and non uniform components.

¬ learn to use batch mesh method.

¬ lwearn to create the volume tetra mesh.

¬learn to create weld method.

¬learn to give rigit connection toi the components.

Conclusion:

¬ Given Rear assembly should be clear the geomtry , midsurface created and tetra mesh it all compeleted as the given value.

Geometry:

¬ This image fully geometry .

FEM:

¬This image is Finite element method

Volume:

 ¬ This image is volume method