Project

Mesh Creation and Quality check of 2D Shell Elements

Geometry Clean up:

Open the files from the working directory with help of File < Open < Model < working model.
To check errors in geometry, enable the wireframe option along with mixed-mode option in Visualization Toolbar.
Different colour edges displayed on the graphic area & error going recognise based on the predefined colour by Altair.
Focus on Red, Yellow colour edges and do changes according to geometry.
Errors are eliminated by using the quickedit & delete option.
After elimination of errors save the file and can extract the mid surface.

MidSurface:

Midsurface option used to extract the mid surface of a model in GEOM menu page.
Some changes are made in mid surface with help of various options like defeature in GEOM page for getting good mesh flow on the surface. Those changes are
1. Adjusting corners by using the point edit option
2. Removing holes less than diameter 6 mm
3. Eliminating the surface fillet less than 2 mm
Now can proceed for meshing on obtained modified mid surface.

2D Meshing:

By using AUTOMESH option in 2D menu page whole mid surface is divided with a target size of 5 mm but generated mesh is not appropriate for analysis.
To get good mesh on geometry few edges were suppressed by using toggle edge option and unnecessary points were removed with help of add/remove option under quickedit option in GEOM page.
Initially selected surface meshed by using automesh option with target size 5 mm and later different options used namely reflect, project, position, organize, mask, delete, translate, ruled, smooth, edit element, replace, split and delete in GEOM, 2D and Tool menu pages.
To get mesh flow from one end to another end localized Remesh and smooth options used and mesh quality check done once we satisfied with obtained mesh on the part.

Quality Check:

Jacobian, aspect ratio, warpage, minimum length, maximum length etc. are used to check the quality of elements.
Assigned values are placed in the below picture
If any element fails the criteria, the node is going to be adjusted manually or doing remeshing on a particular area to get the elements under criteria.
By using elem cleanup and qualityindex options used to eliminate the failed elements.
Unable to adjust nodes for the minimum size of 3.5 mm because of space constraint in only below the first picture.

Properties:

Google Link for Assignment_1

Ship work like this
in your own course.