Week 2 Challenge : Surface meshing on a Pressure valve
Aim
To do surface meshing on the given pressure valve.
Procedure
1) Import the given model into ANSA
2) Perform geometry checks
3) After fixing all the error continue to next step.
4) Before starting with the meshing apply boundary conditions to the model
Internal Components
Spring
Valve head
Column
Case 1 for 5 mm target length
1) To mesh select the meshing module, select the Length under Perimeters and give 5 mm as Perimeter and in Macros.
2) In the meshing parameter give Maximum target length as 7 mm and Minimum target length as 3 mm, for mesh type select Tria.
3) In the quality criteria give Maximum target length as 7 mm and Minimum target length as 3 mm.
4) The maximum and minimum length is given as + 2mm as upper deviation and -2 mm as lower deviation.
Results
The external surface of the pressure valve is captured but the internal components such as spring and the valve head was defeatured because the minimum target length was larger than that of coil diameter and the fillet radius of the valve head. Hence, we cannot proceed further because of the defeature.
External surface
Spring
Case 2 for 3 mm target length
1) To mesh select the meshing module, select the Length under Perimeters and give 3 mm as Perimeter and in Macros.
2) In the meshing parameter give Maximum target length as 4.5 mm and Minimum target length as 1.5 mm, for mesh type select Tria.
3) In the quality criteria give Maximum target length as 4.5 mm and Minimum target length as 1.5 mm.
4) The maximum and minimum length is given as + 1.5 mm as upper deviation and -1.5 mm as lower deviation.
Results
The external surface of the pressure valve is captured but the internal components such as spring and the valve head was defeatured because the minimum target length was larger than that of coil diameter and the fillet radius of the valve head. When compared to the previous case the defeature is less but the geometry is not captured properly. Hence, we cannot proceed further because of the defeature.
External surface
Internal components
Case 3 for 1 mm target length
1) To mesh select the meshing module, select the Length under Perimeters and give 3 mm as Perimeter and in Macros.
2) In the meshing parameter give Maximum target length as 4.5 mm and Minimum target length as 1.5 mm, for mesh type select Tria.
3) In the quality criteria give Maximum target length as 4.5 mm and Minimum target length as 1.5 mm.
4) The maximum and minimum length is given as + 1.5 mm as upper deviation and -1.5 mm as lower deviation.
Results
The external surface and the internal components of the pressure valve is captured well when compared to the other two cases. The downside of having fine mesh is that it increase the computational time.
External surface
Internal components
