Week 4

AIM: To create mid surface and 2D mesh for the given bottle cap plastic component according to given quality criteria using ANSA.

methodology:

geometry cleanup

midsurface extraction

meshing as per criteria

assinging thickness after mesh

Quality criteria:

s.no	quality criteria	value
1	target length	1
2	minimum length	0.5
3	maximum length	3
4	aspect	3
5	warpage	15
6	skewness	45
7	jacobian	0.7
8	min. quad angle	45
9	max quad angle	135
10	min. tria angle	30
11	max. tria angle	120
12	tria %	15

PROCEDURE:

As given component is plastic component and its thickness is very less. So intead of 3D meshing we can go for 2D meshing after proper midsurface extraction of bottle cap.

1. GEOMETRY CLEANUP

The given component is subjected to geometry cleanup. the error is checked and fixed.

2. MIDSURFACING

midsurfacing of component extracted carefully.

3.ASSIGNING SHELL PROPERTY

In a property tab,mid surface are selected and rename according to there name thickness property is appied.

4. MESHING

The given element quality condition is entered into quality criteria tab and it is saved

Batch meshing algorithm is used and element type choosen as mixed.

5.Assigning thickness

separate PID has to be created for each features and parts sp that entire geometry in PID mode will be seen in different colours.

when creating PID there is a option of assigning thickness,there we have to give thickness to each parts.

For example we assign thickness of outer cylinder as 1.22mm.

similarly we will assign thickness of different parts in separate PID.

RESULT

the parts are meshed successfully before assigining thickness of each parts in separate PID.

Learning outcomes

1. able to fix geometrical error in model

2. able to mesh according to quality condition

3. able to assign thickness in seprate PID.

Conclusion

thus 2D mesh is created for given bottle cap according to given element quality criteria using ANSA.