Week - 4 - 2D meshing for Plastic components
AIM:To chech the geometrical errors and extract the mid surface using suitable techniques,performing meshing on the mid surface with the given quality criteria finally assigning thicknees to the mid surface by creating different PID's and assigning thickness individually.
PROCEDUR:
1.Firstly import the cad model and it is a plastic component hence it has a varying thickness through out the component.
2.Extract the mid surface for each surface of the component by using offset option in faces , firstly have to measure the thickness of the surface so that select the surface to offset by giving the "OFFSET VALUE=THICKNESS/2".
3. Use topo option in faces to join the surfaces and give length in mesh mode as"1" so that the refinement will be more clear by extracting the mid surface fo the whole component it lookslike.
4.In some cases like external ribs of the component will be not be attached to the surface after extracting mid surface.
5.At that suitations topo option will not work it is only applicable for small distances , so tere is a option called extend in faces select te con to be extend and select te surface wic as to be extended. so that it turns into a triple con because that con is attached to three surfaces as shown in the above image.
6.For some portions like internal ribs extraction of mid surface is done by usin middle-curves in topo mode.
7.For these type of ribs the thickness is varying so we can use middle curve option and then we can create a new surface between the curves by using option called faces-new-cons.
8.Tere is a inclined surface to extract mid surface tese surfaces use mid curve option for te back end.
9.And for te front portion use project option select te con to be project and select te surface on te mid surface wic as be projected on so tat create a new surface between te two cons by usin te option called faces new cons.
10.For internal treads also follow te above procdure for extraction of mid surface cratin te curves betwen te cons and fill te curve wite faces new option.
11.Finally after extraction of mid surface and doin all eometrical cleanup mesin as to been done on te component by iven quality criteria. so tat finally te fea model looks like.
12.FEA model wit quality criteria or qualiti parameterste component wiil be .
13. And finally assin tickness as per teir surface of te parent eometry to FEA model.