Expansion of deep rolling short course example problem

One follow up request we received after the short course in August was that the 2nd example problem be expanded to show deformation in both parts and elastic recovery of the deformed parts. Some changes to the problem setup were necessary to produce the desired outcome:

  • The mesh for the disc has been refined to better capture the deformation of the disc. While smooth splines allow for coarse meshes to capture geometry, refinement is sometimes necessary to capture the correct physics.​
  • Yield stress has been increased from 2 to 30. This is to allow for more elastic deformation, making the elastic recovery easier to visualize​
  • Analysis type changed from quasistatic to implict dynamic – this to maintain a stable simulation while also respresenting springback which is a dynamic phenomenon. The timestep has also been reduced to 0.005​
  • Time of the simulation (and temporal functions) have been lengthened to 13 to allow for simulation of springback.

Note that the disc will not deform as much as the block due to its geometry.​ Aldditionally, lowering the yield stress (to 2 for example) will make it easier to visualize the deformation in the disc. Raising the yield stress will produce a larger springback effect.

I have added the relevant files below. If you are just interested in viewing results, they can be accessed at this link: https://drive.google.com/drive/folders/1JpJJCC9C_VOfAe3a9ELWxYd8uBlWtx6a?usp=sharing

Step by step walkthrough: Deep_Rolling_Addendum.pdf (4.2 MB)
Complete simulation: deep_rolling_add.json (3.8 MB)
Meshed geometry: deep_rolling_meshed_add.cub (86.2 KB)

If you have any questions, please let me know by replying to this post.

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