Week 6 - Creating connection for Rear door

Creating Connection for Rear Door

Aim:

To perform the connections for the rear door of a car with different connection techniques.

PROCEDURE:

• Open the file (Rear door) in ANSA.

• Set separate PID's for different parts of the door.

FOR HOLES

We use Bolt type Connections.

• For this type of connection, give Centre Of Gravity points from TOPO Module to the holes that need to be connected.
• Convert the COG point to a bolt using the connection manager and connect the parts by selecting BOLT FEATURE.
• Create ZONE CUT for bolt holes for the washer element around the hole.
• TYPE OF CONNECTION used - RBE2 connections.
• This can be achieved by toggling to NASTRAN MODULE>ELEMENTS>RBE2>MANY NODES to create a cluster element for bolt holes when there are no different properties defined to parts.

FOR DOOR HINGE CONNECTION:

• Create RBE2 cluster elements in order to make the movement of rear door towards one direction.
• Delete the sixth degree of freedom (Select only 1 2 3 4 5) by selecting NASTRAN>ELEMENT>INFO.

For SPOT WELDING CONNECTIONS:

• Select the nodes and convert it into spot weld point.
• RBE3-HEXA-RBE3 is the representation for spot welding

HANDLE CONNECTION for door:

Handle connections are made using RBE2 elements along with CONMi (Concentration of mass)>CONM2>NODES in order to give mass representation of the handle in tonnage.

FOR THE CONNECTION OF GLASS WINDOWS:

• Create curve around the perimeter of the window using Feat-2-Curve Option in CLASSICAL MESH>PERIMETERS.
• Transform them into spot lines.
• Select the lines after opening CONNECTIONS MANAGER RBE3-CBUSH-RBE3 is used to represent Window Connections because windows are connected with soft bush to absorb shocks and an off-set is provided at the bottom part of the window for weather beading.
• Assign the parts for connections of CBUSH elements.
• Repeat this procedure for fixed window.
• Change the co-ordinate to 0 in C-Bush Properties so it gets globally aligned towards one direction.

FINAL PART :

CONCLUSION:

• Spot welding connections are made for permanent fixing.
• CBUSH element are realized.
• Degree of freedom assigned for hinges and mass for Handle is given in terms of tonnage.