Week 6-Meshing of Hood Challenge

AIM

To create midsurface and generate mesh on the given hood model

PROCEDURE

MIDSURFACING

Extract the mid-surfaces for all interior and exterior parts of the Hood model

I used auto mid surfacing tool present in geometry module in hypermesh

I created different components to the extracted midsurfaces using model tree

GEOM-->MIDSURFACE-->AUTO MIDSURFACE(SKINN OFFSET)-->SURFACES-->EXTRACT

By using auto cleanup tool in geom module i cleaned up the geometry of models and this cleanup creates necessary cuts and toggle the lines

which will cause elemental failure in the components

GEOM-->AUTOCLEANUP-->SURFACES-->AUTOCLEANUP

To avoid elementel failure at the edges of the holes i created washer splits off 5mm as my target element length is 5mm

GEOM-->QUICK EDIT-->WASHER SPLIT-->OFFSET VALUE-->EDGES

QUALITY CRITERIA

I gave the values for the quality of the elements as mentioned

HYPERMESH-->PREFERENCES-->CRITERIA FILE SETTINGS

MESHING

I moved to 2D module present in hypermesh to generate mesh on the components

2D-->AUTOMESH-->MESH TYPE(MIXED)-->MESH SIZE-->MESH

Rebuild the mesh whre the mesh flow is not proper where tria concentration is more by using rebuild tool present in 2D module

2D-->REBUILD-->ELEMENTS-->REBUILD MESH

Elements can be updated by many options available in hypermesh, there is element edit tool where we can create,combine and split the elements

and cleanup tools in quality index

I drag the tria elements using drag tria option present in quality index cleanup tool

2D-->QUALITYINDEX-->CLEANUP TOOLS-->DRAG TRIA

For optimisizing elemental failures and flow of quads i used optimizing elements in qualityindex

2D-->QUALITYINDEX-->CLEANUP TOOLS-->ELEMENT OPTIMIZATION

Two opposite tria elements are combined by draging the tria element to the opposite tria element and combined them

2D-->EDIT ELEMENTS-->COMBINE-->ELEMENTS TO COMBINE-->COMBINE

By using split option in edit element pannel some of the opposite trias are eleminated by spliting the adjacent quads and combine the elements

2D-->EDIT ELEMENTS-->SPLIT-->ELEMENTS TO SPLIT-->COMBINE-->ELEMENTS TO COMBINE-->COMBINE

Failed elements are optimized by using different tools in hypermesh

Mesh on reinforcements

RESULT