Week 9-Creation of 1D Connectors Challenge

AIM : To create 1D connectors on the given model.

For this challenge, you will have to mesh the given geometry. Provided below are the quality parameters that you have to follow.

Target Element size - 5 Units

S.N	Quality Criteria	Value
1	Aspect Ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min. Length	2 Units
6	Max. Length	8 Units
7	Min angle Quad	45
8	Max angle Quad	135
9	Min angle Tria	30
10	Max angle Tria	110
10	Tria %	15

Create connector and Attach the various parts of the given model

1. Right_Rail_2 & Front_truss_1:- Seam-Quad(angled+capped+L)

2. Left_Rail_2 & Front_truss_1:- Quad elements

3. Front_truss_2, Front_truss_1 & Right_Rail_1:- Spot weld with 2 Layers and 5 mm Diameter

4. Front_truss_2, Front_truss_1 & Left_Rail_1:- Hexa (Adhesive)

5. Rear_truss_2 & Right_Rail_2:- Bolt Connector

6. Rear_truss_2 & Left_Rail_2:- Bolt Connector

7. Right_Rail_1 & Right_Rail_2:- Spot-weld with Rigid Elements

8. Left_Rail_1 & Left_Rail_2:- Spot-weld with Spring Elements

9. Rest all the component left Join them with suitable connectors

Introduction:

Connectors can be 1D,2D,3D .connector are used to connect two or components.geometric entities that define connection between other entitites.Connectors are of different type.

THE MODEL IS IMPORTED IN HYPERMESH USING IMOPORT MODEL.

• Frame assembly is imported.
• then DELETE THE SOLID

  After importing , we change the geometry color mode to BY TOPO, we find that the model consist of solids, Which is not required for our further process.

  So we delete the solid from the model which alos benefits in less time consumption for computing in hypermesh

• we have to set quality criteria in criteria perference option.
• 

• we also create a washer split at the holes, so can obtain a proper mesh flow.

  Distorted region will be removed by following the process (GEMETRY---QUICKEDIT---TOGGLE LINES) to hide the lines to avoid mesh error and process (Geometry-----quickedit---washer split).

• The meshing of the model with the target element = 5mm and mesh type = quads is done(2D-automesh).

• The mesh created is not proper as the part gets complex so the mesh needs to be improved.
• To check the quality of meshing the quality criteria option is opened and the highlighted elements are improved using QI tools given till all the elements are unhighlighted.(2D-Quality criteria).

• 

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• NOW to create connectors to connect as given accordingly.
• Right_Rail_2 & Front_truss_1:- Seam-Quad(angled+capped+L). (1D-CONNECTORS-SEAM.)
• 
• 
• 
• Left_Rail_2 & Front_truss_1:- Quad elements. 1D-CONNECTORS-SEAM.
• 
• 
• Front_truss_2, Front_truss_1 & Right_Rail_1:- Spot weld with 2 Layers and 5 mm Diameter. 1D-CONNECTORS-SPOT.
• 
• 
• 
• 
• 

• Front_truss_2, Front_truss_1 & Left_Rail_1:- Hexa (Adhesive) 1D-CONNECTORS-SEAM.

• 
• 
• 
• Rear_truss_2 & Right_Rail_2:- Bolt Connector. 1D-CONNECTOR-BOLT.
• 
• 
• 
• Rear_truss_2 & Left_Rail_2:- Bolt Connector. 1D-CONNECTORS-BOLTS.
• 
• 
• 
• Right_Rail_1 & Right_Rail_2:- Spot-weld with Rigid Elements.
• 2D-CONNECTORS-SPOT
• 
• 
• 
• 
• 
• 
• Left_Rail_1 & Left_Rail_2:- Spot-weld with Spring Elements.
• 2D-CONNECTORS-SPOT
• 
• 
• Front truss1 and reinf plate : spot weld rigid . 1D-CONNECTORS-SPOT.
• 
• 
• 
• 
• Front truss 2 and right rail 2 seam quad(angled + capped + L). 1D-CONNECTORS-SEAM.
• 
• 
• FRONT TRUSS 2 AND LEFT RAIL 2 - QUAD .
• 1D-CONNECTORS-SEAM.
• 
• 
• NOW Check whether any duplicate elements exists. go to shrink elements to see duplicate elements.
• complete model with all the required connectors.
• check the quality of mesh after creation of connectors. If any elements are not proper we can optimize using element cleanup 2D-QUALITY-CRITERIA.
• 
• 
• 
• 
• 
•