Define the Load

To apply a pure mode I loading to the beam, vertical displacements are applied to the free end.

First, an equation constraint is applied to allow for a simple determination of the total reaction force during post-processing.

1. Create a node set (Tools > Set > Create) named Top_Load_Node. Select the node highlighted below.

   

2. Create a second set named Top_Tied_Nodes that is comprised of the nodes shown below.

   

3. Switch to the Interaction module.
4. To constrain the y-direction displacement of the tied nodes to load node, select Constraint > Create and select the Equation type. Name the constraint Top. Fill out the Edit Constraint dialog box so that it appears as shown below.

   

5. Repeat steps 1 - 4 to create a constraint for the bottom ply.
6. Switch to the Load module.
7. Create a Displacement/Rotation type boundary condition called Top. When prompted to select a region, choose the Set option and select the Top_Load_Node set. Enter 10 as the value for U2.
8. Create a Displacement/Rotation type boundary condition called Bottom. When prompted to select a region, choose the Set option and select the Bottom_Load_Node set. Enter -10 as the value for U2.