Week 12:Project 2-Meshing of Rear Wheel Holder challenge

AIM ;

To perform Pre-processing of the wheel tub component, the step involved in the process are

1 geometry cleanup

2 Extract midsurface for a given component

3 performed meshing on the extracted midsurface accounting to the given quality criteria

4 Assign thickness for every component

STEP_1

Import model

• Import that model in hyper mesh

Fig_1

STEP_2

Tune on display fixed point, By using this option for visualizing a corner point

Fig_2

STEP_3

convert; Auto mode to Bytopo mode

Why the need for Converted (Auto mode to By Topo mode) is component surface visual clearly at the same time working comfort

To

STEP_4

Inspection

There is a plastic component thickness of 0.75

Fig_3

4.1_Free edge

Free edge in the parent component

Fig_4

4.2_OPPEN SURFACE

Fig_5

4.3_ More extra surface in the parent component

Fig_6

STEP_5 GEOMETRY CLEANUP IN PARENT SURFACE

5.1_ Delite Extra surface in parent

Fig_7

By Using Tool DELETE (F2) > CHANGE ELEMS TO SURFACE > SELECT SURFACE > DELETE

Fig_8

5.2_ Select surfaces

Fig_9

5.3_ Delete Surface

Fig_10

5.4_ By Using the fillet option fill the surface

Fig_11

STEP_6 CRATE midsurface

What is midsurface?

1. Midsurface modeling is a technique for creating a simplified shell representation of a solid model.

2. Midsurface modeling can reduce the computational expense of analyzing a complete solid model when a shell model with a defined thickness and fewer details is suitable for the required analysis.

6.1_Interior trim panel bottom surface mostly same thickness so I take offset option

By Using Tool (SHIFT+F9) > OFFSET > select surface > in by face option > OFFSET

Fig_12

6.2_ Select surface by using face option

Fig_13

(Fig-14)

6.3_ We need only for offset surface, so hear offset only duplicate in the current component

SURFACE > DUPLICATE > CURRENT COMPONENT

(Fig-15)

(Fig-16)

6.4_ Now done midsurface for interior trim panel inside door component

(Fig-17)

STEP- 7

GEOMETRY CLEANUP IN MIDSURFACE

What is Geometry Cleanup?

• The Geometry Cleanup option allows you to "clean up" the model geometry by merging vertices that are very close to each other into a single vertex, according to a user-definable spacing criterion.

7.1_ In Parent Component some Surface will be open, that type of surface solves to manual

(Fig-18)

7.2_This open surface point replaces the near-surface point (or) delete surface & recreate surface. its open surface solved

By Using [QUICK EDIT > TOGGLE]

(Fig-19)

7.3_Replace project point By Using the replace tool

(Fig-20)

Quick Edit (F11) > replace point

(Fig-21)

7.4_Now Done replace point, now minimum length quality criteria failing is avoid in this surface

(Fig-22)

7.5_ Toggle unnecessary line in the parent component

By Using Toggle tool in (F11) QUICK EDIT > TOGGLE

(Fig-23)

7.6_ Find out the minimum length for given quality criteria because this minimum length failing for element, so toggle the minimum length line

(Fig-24)

STEP_8 Starting Mesh

• Before starting mesh doing some basic steps
• The pathway to create the Criteria File: Preference → Criteria File Settings (ref fig-58).

(Fig-25)

8.1_ Ware to starting mesh on component, which place feel critical or more feature available in a component that places start component

I am starting mesh from this place because this place more features available Eg; (Speaker grid, rib)

Some Conduction for other important parameters in tria management.

* no tria in corners or edge

* no opposite trias

* no back to back trias

* No trias in fillets or hemming (minimal)

* No rotational quads

* No trias should sare a Boundary with Feature line

* connectivity between the element

* Split & perform the mesh

* used mixed type mesh for irregular shaped surface & quads only for rectangular/square surface (opposite side should be parallel & equal)

(Fig-26)

Set from point & to points

(Fig-27)

Positions The Elements

(Fig-28)

Done Positions

(Fig-29)

Rotate the element

we can use rotate elemen to rotate the same features anlong the axis and then after we have to project that element according to the surface.

(Fig-30)

Here all three are of diffent at its axis so we have to rotate it accordingly.

The failing element is solved ref(fig-)

(Fig-31)

8.2_Due to the Meshing Circular surface, the mesh flow is not coming properly. ref (fig-)

(Fig-32)

8.3_ How to Crate smooth Mesh flow in a circular surface

By Using Tool (Darg, Swap, smooth & remesh)

Drag option [QUALITY INDEX]

(Fig-33)

8.4_ Swap Edge option [QUALITY INDEX]

(Fig-34)

8.5_ Smooth [QUALITY INDEX]

(Fig-35)

8.6_ Re-meshing [ 2D, AUTO MESH, SELECT ELEMENT, MESH]

(Fig-36)

STEP-9

9.1_Check the Tria By Using CONFIG TOOL

(Fig-37)

STEP- 10

10.1_FIND THE FREE EDGES

(Fig-38)

10.2_Only free edge

(Fig-39)

STEP-12

ASSIGN THICKNESS

1_ Crate one component in hyper mesh tree ref (Fig_78)

2_ crate current component before creating a new component

3_ move required element in crate new component ref (fig_81)

By Using TOOL > ORGANIZE > SELECT ELEMENT > MOVE

4_ Crate one Property in hyper mesh tree

5_ required thickness assign That property

(Fig-40)

Select an element & organize that element

(Fig-41)

Organize element or move the element to crate component

(Fig-42)

Create one property in tree column then assign thickness for the property

(Fig-43)

Assing thick property in component

(Fig-44)

Done Assing Thickness for all component

(Fig-45)

(Fig-46)

CONCLUSION

performed meshing and assigned thickness to the SPARE WHEEL component

1 From take midsurface for a given component

2 performed meshing on the extracted midsurface accounting to the given quality criteria

3 Assigned thickness for every component.