Heat Transfer: Thermal compression join and frictional heat transfer

This example shows a coupled thermal-mechanical analysis.

The coupled analysis allows 

• To determine the requisite temperatures in heating to join the parts

• To test the compression joint in process (e.g. in the case of heating by friction)

Thermal expansion by heating increases the inner diameter of the disc. The shaft can be moved forceless into the right position. By cooling the disc the compression joint is realized. 

Image 1: Model 

(click on the images to enlarge)

Image 2 : Thermal joint    

Image 3: contact forces

Image 4: Heating by friction

In the second step the rotating disc is compressed by the bodies above and below (like a disc brake). Friction energy causes the assembly to heat up. The final temperature reaches a high value and the compression will fail in process.