Week 3 - 2D meshing for sheet metal

Abhishek Anil Patil | 15/06/2022

Objective

For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria. (Refer the table Below for the Quality criteria) 

S.No	Quality Criteria	Value
1	Target/Average length	5
2	Minimum Length	2
3	Maximum Length	7
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
10	Tria Percentage	15

 

 

Procedure

Components

• Inner panel
• Outer panel
• Hinge support 1
• Hinge support 2
• Latch support

1. Import the model

2. Geometry check and clean up

 

The errors are fixed using the auto fix tool in the geometry check or by manually using TOPO or delete faces

3. Thickness

Measure thickness for each component

Name	Component thickness	Midsurface thickness
Inner panel	0.75	0.375
Outer panel	0.75	0.375
Hinge support 1	1.2	0.6
Hinge support 2	1.2	0.6
Latch support	1.2	0.6

Midsurface

There are two methods – manual (offset) & auto Midsurface skin

In this model both of these methods were used

Mesh Parameters

The mesh parameters are defined as below

 

Quality criteria

The above mentioned criteria is defined below

 

Meshing

Divide the geometry into smaller area by cut and join to get smoother mesh

Use best mesh and improve commands to improve the quality of mesh

Use smooth command to smooth the mesh and remove quality issues

Output

Latch support

 

Hinge support

 

Outer panel

 

Inner panel

 

Result

The sheet metal part was meshed with ANSA

The Midsurface, assigning thickness and meshing was done without violating the quality criteria