Example 66: Joint Load

The joint load is applied around a through hole of two plates.
The joint load allows you to take into account the forces that pull in opposite directions, such as the axial force resulting from the bolted connection.
Unless specified in the list below, the default conditions will be applied.

Two plates, plate1 and plate2, measuring 25 mm x 25 mm, are created and stacked. A hole is drilled through both plates.

Circular faces are carved around the through hole to set the joint load boundary conditions (Joint1 and Joint2).

The boundary of the two plates is set with simple contact (automatic judgment) boundary condition (EasyContact).

The symmetric boundaries (SymX and SymY) are set to the faces of symmetry of the model to make the symmetric model.

To restrict the Z displacement, the boundary condition (FixZ) which fixes Z displacement is set to the point on the symmetric face.

* Available from the material DB

The boundary conditions are set as follows.

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
Joint1/Face	Mechanical	Joint Load
Joint2/Face	Mechanical	Joint Load
EasyContact/Face	Mechanical	Simple Contact	Automatic Judgment
SymX/Face	Symmetry/Continuity	Symmetry	Select Reflective
SymY/Face	Symmetry/Continuity	Symmetry	Select Reflective
FixZ/Verted	Mechanical	Displacement	Select only Z component. Set it to 0.

The joint load pair of 1N is set as below.

Boundary Pair	Joint Load
Joint1-Joint2	1.0 [N]

Below is the displacement diagram with color contour of Z component.

For easy viewing, the deformation is scaled up to about 26000 times.

The joint load caused a depression of about 25nm around the through hole of the polycarbonate plate2.

On the other hand, the area far from the hole is deformed to float up to 48nm.

Below is the contour diagram of the aluminum plate1 only.

Although it is smaller compared with the plate2, plate1 also exhibits the deformation.

It is about 2nm around the through hole.