Challenge

Assignment 1-2D Meshing Challenge

AIM :- Create 2D mesh for given components by considering below rules.

Procedure :-

Import given .hm file into hypermesh , go to import model - select file - click on import

Follow the above mentioned path, to import remaining all components, click on fit model option , to fit all components in single window

Remove all temporary nodes present in model , go to geom - temp nodes - clear all

lvl 10 :-

To check connectivity errors put it in By Topo view mode
in the above pic we can see some green lines , red lines and yellow lines
green lines means both surfaces are connected properly without any fail
red lines means there is an error(gap) between surfaces or missing surface
yellow lines means three or more surfaces connected or duplicate surfaces
by using quick edit, surfaces, surface edit options we can clear this topology errors mostly toggle edge and replace point options are used

Put in wire frame view mode , to see all surfaces are connected properly or not
After that extract the mid surface , go to geom - mid surface -select surfaces - click on extract

To check whether generated auto mid surface correct are not , put parent component in transparent mode
defeature pin holes which are <5mm in dia , go to geom - defeature- pin holes - select surfaces - give diameter - click on find - click on delete

defeature surface fillets which are less than min element size , go to geom - defeature- surface fillets- select surfaces - give parameters - click on find - click on remove.

Now do meshing operation, go to - 2D- automesh - select surface - give element size (5mm) - element type (mixed) - click on mesh
some elements are not captured the features properly so remesh at that location
project all elements nodes on surface edge using proect option , go to - tools - project- to line - select nodes (using by path option) - select line - click on project

after meshing go for quality check , to set quaity parameters , go to preferences - criteria file settings
To check elements quality go to 2D- Quality index

from the above pic , it shows 85 elements are failing for quality
most of the elements failing at corners because , length of the edge is too small when compared with min element size, to check its length press F4
to solve this supress its one of the edge , go to geom - quick edit - toggle edge (OR) go to geom - edge edit - supress edge.

Use cleanup tools , edit element , replace , node edit , smooth ,remesh options to clear the quality check for remaining elements

lvl 10000:-

extract mid surface , go to geom - mid surface -select surfaces - click on extract
toggle the unnecssary edges , go to geom- quick edit - toggle edge

in the above pic , it shows distance between two points are less than min element size , so supress those edges also

after completed geometry clean up go for 2D Meshing, go to - 2D- automesh - select surface - give element size (5mm) - element type (mixed) - click on mesh
To clear quality check , follow the procedure for above mntioned lvl 10 component

original geometry :-

extract mid surface , go to geom - mid surface -select surfaces - click on extract

defeature pin holes which are <5mm in dia , go to geom - defeature- pin holes - select surfaces - give diameter - click on find - click on delete
defeature surface fillets which are less than min element size , go to geom - defeature- surface fillets- select surfaces - give parameters - click on find - click on remove

after completed geometry clean up go for 2D Meshing ,go to - 2D- automesh - select surface - give element size (5mm) - element type (mixed) - click on mesh
To clear quality check , follow the procedure for above mntioned lvl 10 component
after meshing crate thickness to the elements
create a new property , right click - create - proprty , rename the property into thickness 2_00
select card image - P1_SHELL , and give Thick 2.00
after creating property assign this property to elements
select component - right click- assign - select property - click on ok

RESULT :-

Check free edges for elements , go to tools - edges - select elements - tolerence (0.1) - find edges

all elemenents are conncted properly without any gap.
To whether thickness is assigned or not , put elements in 2D Detailed Element Representation mode and By Prop mode

Ship work like this
in your own course.