Meshing the Plastic Component of a Car Side Door Model
AIM:
Mesh the following component and assign thickness:
Target Element Length = 4mm
| S.N | Quality Criteria | Value |
| 1 | Aspect Ratio | 5 |
| 2 | Skewness | 45 |
| 3 | Warping | 15 |
| 4 | Taper | 0.5 |
| 5 | Min. Length | 2mm |
| 6 | Max. Length | 6mm |
| 7 | Min angle Quad | 45 |
| 8 | Max angle Quad | 135 |
| 9 | Min angle Tria | 20 |
| 10 | Max angle Tria | 120 |
| 10 | Tria % | 10 |
INTRODUCTION:
The door panels were formerly made of cardboard with an upholstered interior finsh of vinyl,leather,cloth,carpet or other materials for the decoration of the trim.Modern cars typically have door made out of injection molding,as well as other incorporates other decorative materials.
The design should incorporate both the necessary service amount and the functional purpose such as easy opening and closing and strength. Doors currently incorporate parts that contribute to the appearance, functionality, and ergonomics of the vehicle. These include armrests, switches, other controls for windows, locking mechanism, speakers etc. These panels typically consist of a foamed core covered with either textiles or plastics
THEORY:
PROCEDURE:
Import the CAD model into hypermesh
We import the required CAD model to hypermesh with RADIOSS as user profile using the import geometry in meu bar
Geometry clean up of the model
To get a proper mid surface we clean up the model and fix all deformations and other such issues such as fixing gaps between surfaces
Mid-surface extraction of the component
Extraction of mid-surface using various techniques. Here as different parts are of different thickness and not uniform manual mid surface extraction is an ideal way for extracting the mid surface
Meshing if the mid surface
Here we perform 2d mesh on the mid-surface. In order to perform 2d mesh we go to 2d panel and select the auto-midsurface option with a target element length of 4 and the mesh type as mixed
Eliminate the elemental failures as per the quality criteria
After meshing we ensure the mesh generated is followed within the quality criteria. Wecan check this using the quality index option in the 2D panel. Here in this mesh we avoid rotating quads in mesh and also tries near fillets and free edges
Apply the required thickness and convert the shell elements into solid elements
Here we individually apply thickness to each every part corresponding to their parent component. The thickness we assign for different parts can be done in the properties panel by setting the required thickness and assigning to each of those components
MODEL:
RESULT:
The given plastic components mid surface was extracted and meshed accordingly to the given quality criteria