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The model is a seal between two concentric shafts. The material model for this axi-symmetric model is a two coefficient Mooney-Rivlin. For the purposes of illustration, the finite element model was rotated to provide a 3D plot. The objective of this analysis was to arrive at a shape that would produce the lowest strain for a specified axial displacement. Once this was determined then the model would be rotated into a 3D model to permit the radial and rotational misalignment interaction to be studied.

The analysis model is shown below.

The inner and outer diameter of each end of the model were restrained in the radial direction to simulate the clamping of the boot on to a section of pipe. The right end of the model was further restrained in the axial direction and the left end of the model was translated in the axial direction towards the opposite end. Since there is only one body in this model a contact table was not required and the automatic self-contact checking was in effect. A close examination of the deformation (see the animation file) will show the elements coming in contact with each other and then lifting off as the axial deformation continues.

The following video shows results from the analysis.

Video of Shaft Sealing Analysis

Note: the ZIP files download faster than the AVI file. After downloading, you must unzip the file with a program, such as WinZip or PKzip. Then choose "File | Open" from your web browser's menu. Find the unzipped file and open it with the web browser. Click on the image to see the video.

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