Week 8-Challenge

Week 8-Challenge
HyperMesh for FEA Plastic and Sheet Metal Applications

OBJECTIVE:

For this week\'s challenge, you will have to create 3D meshes for the models provided in the challenge according to the parameters mentioned.

Question

3D Meshing:

Elements sizes: Min- 2mm, Target- 5mm,Max- 7mm

Tet collapse: 0.15

1. Create Teramesh for Housing

Housing_Model

1. For the given Model,

Model-2, Model-4,

• Create 3D mesh with 6mm

PROCEDURE:

1. Create Teramesh for Housing

• Import housing (2).stp file by using import geometry.
• Remove fillet less than 5 mm by using defeature command.
• Prepare geometry by using replace point, toggle edge, split surface etc from quick edit panel.
• Below image shows models after geometry cleanup.

• Completed 2D meshing by using following path:

2D > automesh > select surface > element size=5 > element type = trias > mesh.

• After completion mesh checked quality of 2D mesh.
• Parameter used for element check: Elements sizes: Min- 2mm, Target- 5mm,Max- 7mm.
• Remesh the elements those failed in above element check parameter.
• Used 3D mesh panel after checking of 2D mesh quality.
• Completed 3D meshing by using following path:

3D > tetramesh > select all 2D tria element > mesh

• Checked tet collapse = .15 for 3D element.
• Those elements failed in tet collapse are remesh or increase distance between nodes to achieve tet collapse 0.15.

RESULT:

• Below image of model after completion of Tetramesh.

1. Create Teramesh for Model2 (TETMESH_PM.hm)

• Open TETMESH_PM.hm in hypermesh.
• Remove fillet less than 5 mm by using defeature command.
• Toggle highlighted free edges by using toggle edge command.

• Prepare geometry by using replace point, toggle edge, split surface etc from quick edit panel.
• Supress hole having diameter less than 5 mm.
• Below image shows models after geometry cleanup.

• Completed 2D meshing by using following path:

2D > automesh > select surface > element size=6 > element type = trias > mesh.

• After completion mesh checked quality of 2D mesh.
• Parameter used for element check: Elements sizes: Min- 2mm, Target- 6mm,Max- 10mm.
• Remesh the elements those failed in above element check parameter.
• Used 3D mesh panel after checking of 2D mesh quality.
• Completed 3D meshing by using following path:

3D > tetramesh > select all 2D tria element > mesh

• Checked tet collapse = .15 for 3D element.
• Those elements failed in tet collapse are remesh or increase distance between nodes to achieve tet collapse 0.15.

RESULT:

• Below image is model after completion of Tetramesh.

1. Create Teramesh for Model4 (Chassis_assy.hm)

• Open Chassis_assy.hm in hypermesh.
• Given chassis is symmetric, therefore I have divide chassis into left part and right part
• Geomtric cleaning did on only left side of part.
• Remove fillet less than 5 mm by using defeature command.
• Toggle free edges by using toggle edge command.
• Prepare geometry by using replace point, toggle edge, split surface etc from quick edit panel.
• Supress hole having diameter less than 5 mm.
• Below image shows models after geometry cleanup.

• Final left side of assembly after geometry cleanup.

• Completed 2D meshing by using following path:

2D > automesh > select surface > element size=6 > element type = trias > mesh.

• After completion mesh checked quality of 2D mesh.
• Parameter used for element check: Elements sizes: Min- 2mm, Target- 6mm,Max- 10mm.
• Remesh the elements those failed in above element check parameter.
• Used 3D mesh panel after checking of 2D mesh quality.
• Completed 3D meshing by using following path:

3D > tetramesh > select all 2D tria element > mesh

• Checked tet collapse = .15 for 3D element.
• Those elements failed in tet collapse are remesh or increase distance between nodes to achieve tet collapse 0.15.
• Below image is for model after completion of Tetramesh.

• For crating mesh on right side I have used reflect
• For reflect I have crated centre point between left side and right side assembly.
• For reflect command follow below path: Tool > reflect > select elemnt > base point > reflect.

RESULT:

• Below image shows complete assembly with tetramesh.