Jump to content
beytut

Number Of integration point

Recommended Posts

Hi,

 

If only one integration point through thickness is used, a membrane only behavior will be obtained. In case of an elastic behavior, one gets the exact solution from three integration points – that is to say that the bending moments are exactly integrated through the thickness of the shell. In case of a plastic behavior, the bending moments are not integrated exactly. Using more integration points, the solution becomes more accurate; so it is recommended to use five integration points. It also controls hourglassing.

 

Hourglass modes are element distortions that have zero strain energy. Hourglassing may easily lead to excessive distortions  To control hourglass assign Ishell-24 and N-5 for shell elements. And for solids use Isolid-14. For explicit structural analysis Ishell=24 formulation (QEPH shells) is recommended, due to balanced accuracy vs. speed. QEPH shells are more accurate for elastic or elasto-plastic loads, whatever the loading type - quasi-static or dynamic. Fully integrated 12 QBAT shells eliminate hourglassing, but are slower to compute.

 

Try with different settings to study the hourglassing effect by postprocessing the hourglass energy in HG.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
You are posting as a guest. If you have an account, please sign in.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...