Assignment 1-2D Meshing Challenge

OBJECTIVE:

For the given three parts, carry out the following:

Geometry Clean-up

Extracting the Midsurface

Midsurface clean up

Defeaturing the holes < 5mm

2D quad mesh with target element length 5mm

Property assignement to assign thickness.

PART1:

Fig1: Imported Model.

Geometry Clean-up

fig2: Wireframe view to highlight the free edges and broken geometry in the part

Press F11 (Quick edit) >> Toggle Edge.

Geometry can be stitched for the broken geometry

Missing surfaces can be created by using Surface >> Skin >> Choose lines >> Create,

Stitch using Toggle edge if necessary.

Fig3: Stitched geometry in wireframe.

Generating Mid-surface:

Using Surface edit >> Offset >> Choose surface >> Enter offset value >> Checxk normals and assign direction to offset (+ or -) >> Offset.

Fig4: Mid-surface

Stitchinhg the broken geometry in mid-surface

Fig5: Final mid surface

Defeaturing Pin holes:

Defeature >> Pin holes >> enter max hole size >> choose surface >> find >> delete

BEFORE DEFEATURING

AFTER DEFEATURING

MESH:

Criteria settings:

Max size = 7

Min size = 3.5

Target size = 5

Fig6: Criteria file for the mesh

FINAL MESH:

F12>>Automesh>>Choose surface >> 5mm > Create

Property assigned:

Part1, T = 0.9mm

Material Assigned:

E = 201 GPa

`rho` = 7.86`times``10^-6` Kg/`mm^3`

`v` = 0.30

PART 2:

Midsurface:

Mesh:

Property assigned:

Part_2, T =2.0mm

Material Assigned:

E = 201 GPa

`rho` = 7.86`times``10^-6` Kg/`mm^3`

`v` = 0.30

PART 3:

Midsurface:

Mesh:

Property assigned:

Part_2, T =1.8mm

Material Assigned:

E = 201 GPa

`rho` = 7.86`times``10^-6` Kg/`mm^3`

`v` = 0.30