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Example68Analysis with Overlapping Meshes

General

• An axis is inserted into a ring. The outer diameter of the axis is slightly larger than the inner diameter of the ring.

• In this example, overlapping meshes are used for the ring hole and the axis. A similar analysis is performed in Example 42 where the initial strain is used.
Unlike Example 42, it is not required to calculate the initial strain manually in advance in this example. Also, the analysis can be performed even if the initial strain is not obtained.

• The distributions of displacement and stress are solved.

• Unless specified in the list below, the default conditions are applied.

To create the overlapping meshes, the ring hole and the axis must be meshed in the different meshing spaces. If meshing is performed in the same meshing space,
an overlapping area is absorbed in either one of the bodies and the meshes will not overlap.

 Overlapping Bodies Same Meshing Space (meshes do not overlap) Different Meshing Spaces (meshes overlap)

Analysis Space

 Item Setting Analysis Space 3D Unit mm

Analysis Condition

 Item Setting Solver Stress analysis [Galileo] Analysis Type Static Analysis Analysis Options None

Model

For a stable contact analysis, the calculation is performed on the half of the model in X direction, and a symmetric boundary condition is applied to the plane of symmetry.

Body Attributes and Materials

 Body Number/Type Body Attribute Name Material Name 0/Solid RING 001_Al * 1/Solid AXIS 001_Al *

* Available from the material DB

 Body Attribute Name Tab Space Number RING Analysis Domain 1 AXIS Analysis Domain 2

Boundary Condition

The boundary conditions are set as follows.

 Boundary Condition Name/Topology Tab Boundary Condition Type Setting Target/Face Mechanical Contact Surface Select “Contactor surface”. Contact/Face Mechanical Contact Surface Select “Contactee surface”. Fix/Face Mechanical Plane of Symmetry Select all of X/Y/Z components. UX=0, UY=0, UZ=0 Symmetry/Face Mechanical Displacement Select [Reflective] on the Symmetry/Continuity Tab uy Mechanical Normal Displacement Displacement is zero

Results

The contacting face pressure is shown below. The vectors show the pressure and directions on the contacting face. The unit is [Pa].

The model dimension, the fitting differential, and the material are the same as in Example 42. Similar pressure is generated.

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