Challenge

Week 12:Project 2-Meshing of Rear Wheel Holder challenge

AIM:

To perform preprocessing on the given rear wheel holder sheet metal component using hypermesh preprocessing software

OBJECTIVE:

To generate the mid surface manually and do a geomatric cleanup on the component
To generate mesh flow and to get proper meshflow on the given component with low tria concentration
To check the element quality according to the given quality critiria
To assign a thickness for the component

PROCEDURE:

Import given cad model into hypermesh
switch to the topo mode and examine whether the solid exist in the component or not, if solids exist , delete the solid

fig: real wheel holder

we need to check weather any errors in geomatry
clear the free edges in body then only we can exract mid surface properly
organize into single component and delete unnessesary component
we need measure the thickness to given component to check weather all region is uniform thickness
thickness is .75mm
fix geomatric deformation in certain areas by delete the surface and recreate new surface there
fix all connectivity issues by repacing edges with suitable tolarance
just mesh the body ,save minimum sizefailed elements and mark with temp nodes and examine the regions to fail on minimum
do nessesary actions like midline between nearby lines etc
extract mid surface using auto midsurface option
by offset + planes + sweep
middle surface is assigned into new collector

fig: mid surface

Target Element Length = 5 Units

fig: manual mesh

while meshing do partishions on geomatry and mesh manually to improve quality of mesh flow
use rebuild mesh after meshing for get good meshflow with minimized tria ,algorithm behind rebuild mesh give you better mesh flow
always remeber to eliminate opposite tria , touching trais , trais on edges ,trias on fillets ,rotational quads
in coverging fillets we can kept trias
always keep one direction flow to mesh

reflect certain symmetric geomatry to save time
in quick edit panel moslty used tools - toggle edge for toggling
add remove point for add and removing points
replace point to replace one point to another
split surface node to create split on surface by nodes
split surface line to create split on surface by node and to line
project point to project a point to another line
use options quality index to eliminate failures
especially drag tria for removing tria
swap edge to move tria
split collapse edge
element optimize for optimize elements
smooth for smoothing
combine tria to combine adjcent tria
after every meshing done smoothing properly for proper mesh flow
to eliminate warpage we want to translate most deflected node from plane to inwards the plane
to eliminate the max quad ,minimum quad and trais are by go to distance and set the angle per critiria
by doing repeated operations and eliminations of failed element finally we got all elements passes quality critria

after completing mesh process check for connectivity
go to edges and equalance if needed and find egdes then exmine if there is any connectivity problem and fix it

hence every checks completed then assign thickness to component by creating a component and parameter then assign thickness to mesh .75
check the thickness is assigned

fig: final image

result:

Ship work like this
in your own course.