Week - 4 - 2D meshing for Plastic components
REPORT
OBJECTIVE
To generate midsurface and to mesh the given plastic bottle cap model with good mesh flow satisfying the quality criteria.
PROCEDURE
In TOPO module, performed the topo and in MESH module i given the target element length in perimeter-length command. Then i perform autofixing the geometry errors using checks-geometry.
Started mearuring the thickness for midsurface generatio using faces-offset , first i extracted the midsurface of the bottom cylindrical surfaces , since features are present in this part, i extracted circular cons from top and bottom part of the cylinder using curves-curves2cons command and completed the curve using corves-create and connect-multi.Using hotpoints-project i projected the hotpoints. After i created surface there using faces-new, then deleted the curves and performed topo.
Then i created midsurface for top part, using faces-offset and feature angle selection so i can all the srfaces of same thickness ,created some mid using faces-new, i entered into the features, used faces-middle to create and extended it using faces-middle. For copying the feature; i used trabsform-copy-rotate and points-onCOG.I used faces-intersect to correct overlapping features and cons-project, curves-middle for extraction of features.
I started MESH module, assigned all the given quality parameters in qualitycriteria tab and give target element length in mesh parameter. After geometry cleanup i started meshing, for meshing i used meshgeneration-best and to make the mesh good i used shellmesh-reconstruction,smooth and elements-split,swap. Then i assigned the thickness for each elements. I used elements-release command to seperate geometry and FE model and performed macros-join(keep on optionlist) on FE model.
RESULT
Midsurface is generated and meshed the given component with good meshfow. 41 elements are failed to satisfy quality criteria because it is near triple cons and impossible to solve ,all other elements are satisfied the quality criteria.