Settings Warp constraints

You must have a Midplane, Dual Domain or 3D meshed model, and use an analysis sequence including a Warp analysis.

To perform a Warp analysis, you need first to prevent rigid body motion (free rotation in space) of the part by constraining 6 degrees of freedom (translational and/or rotational) for each cavity. Once the rigid body motion is fixed, you can set the displacement constraints to simulate real conditions of use for your part.

1. If the model nodes are not visible, turn on the appropriate layer in the Layers pane.

2. If you want to use a local coordinate system when setting constraints, first define and activate the local coordinate system.

3. Click (Boundary Conditions tab > Constraints and Loads panel > General Constraint).

   The General Constraint dialog is displayed.

4. Fix the rigid body motion by defining a reference plane with 3 nodes as follows:

   1. Use the cross-hairs to select the first node of the reference plane, then pin this node by setting Fixed constraints on the X, Y, and Z translations.

   2. Select Warp Analysis from the Use constraint in drop-down menu, and then click Apply.

      This defines the origin of the reference plane.

   3. Select a second node, then set Fixed constraints on the Y and Z translations.

   4. Make sure the Warp Analysis remains selected in the Use constraint in drop-down menu, and then click Apply.

   5. Select a third node, then set Fixed constraints on the Z translation.

   6. Make sure the Warp Analysis remains selected in the Use constraint in drop-down menu, and then click Apply.

      The rigid body motion constraints are now fixed.

5. Set the displacement constraints.

   Note: When displacement constraints are set, the undeformed part is used as a reference in order to define the final shape.

   During the warpage analysis, the displacement constraints are adjusted to fit the desired final shape of the part.

   1. Use the cross-hairs to select the node(s) for which you want to set the constraint.
   2. Specify for each of the X, Y, and Z directions whether the translational or rotational degree of freedom at the node(s) should be Free, Fixed, or set to a specified distance or angle.
   3. Select Warp Analysis from the Use constraint in drop-down menu.
   4. Click Apply in the Set Constraints dialog or right-click in the model pane and select Apply.

6. Once you have finished applying constraints, right-click in the model pane and select Finish General Constraints.

To simulate the real conditions when the injection molded part is mounted into an assembly, you need to constrain the mounting nodes in the molded part.

1. If the model nodes are not visible, turn on the appropriate layer in the Layers pane.

2. If you want to use a local coordinate system when setting constraints, first define and activate the local coordinate system.

3. Click (Boundary Conditions tab > Constraints and Loads panel > General Constraint).

   The General Constraint dialog is displayed.

4. Fix the nodes that the injection molded part is going to be mounted into as follows:

   1. Select the mounting nodes, then pin these nodes by setting Fixed constraints on the X, Y, and Z translations.
   2. Select Warp Analysis or Stress and Warp Analysis from the Use constraint in drop-down menu, and then click Apply.

5. Once you have finished applying constraints, right-click in the model pane and select Finish General Constraints.