CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Structural Mechanics

Explicit time integration of shells without "drilling" DOF

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 17, 2024, 07:56
Default Explicit time integration of shells without "drilling" DOF
  #1
Member
 
Anders Aamodt Resell
Join Date: Dec 2021
Location: Oslo, Norway
Posts: 66
Rep Power: 4
ander is on a distinguished road
A number of shell elements have only 5 degrees of freedom (3 translations and 2 rotations). In explicit FEM, it is common to use the central difference method, and for instance in the paper of Belytschko et. al. https://doi.org/10.1016/0045-7825(84)90026-4 it is stated that this method is used.

However, to me it doesn't seem trivial to extend the central difference method for translational DOFs to a setting with rotational DOFs, ESPECIALLY when there are only two rotational degrees of freedom. I have some idea of how this can be done with three rotational DOFs, then you can use an exponential map to update a rotation matrix or quaternion that describes the nodal rotation.

If someone has any pointers or sources on how this can be done in the 5 DOF setting, I would be happy to hear it.
ander is offline   Reply With Quote

Reply

Tags
central difference, drill, rotations, shell

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
bash script for pseudo-parallel usage of reconstructPar kwardle OpenFOAM Post-Processing 42 May 8, 2024 00:17
Slow calculation time on CFD server killian153 Hardware 4 July 27, 2021 08:28
pressure in incompressible solvers e.g. simpleFoam chrizzl OpenFOAM Running, Solving & CFD 13 March 28, 2017 06:49
same geometry,structured and unstructured mesh,different behaviour. sharonyue OpenFOAM Running, Solving & CFD 13 January 2, 2013 23:40
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07


All times are GMT -4. The time now is 15:52.