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April 13, 2024 at 3:42 pmThomas LowerySubscriber
I am simply looking to simulate the contact between two rings made of beam elements using the thickness of the beams as the contact "surface".Â
Â
The manual mentions beam-to-beam contact:
*CONTACT_AUTOMATIC_GENERAL is a
single surface contact similar to *CONTACT_AUTOMATIC_SINGLE_SURFACE
that also includes treatment of beam-to-beam contact and in doing so,
checks along the entire length of the beams for penetration.
But my rings don't see each other with this turned on:
*CONTACT_AUTOMATIC_GENERAL_ID
$#   cid                                 title
     1                                   Â
$#  surfa   surfb  surfatyp  surfbtyp  saboxid  sbboxid    sapr    sbpr
     0     1     2     2     0     0     0     0
$#    fs     fd     dc     vc    vdc   penchk     bt     dt
    0.0    0.0    0.0    0.0    0.0     0    0.01.00000E20
$#   sfsa    sfsb    sast    sbst   sfsat   sfsbt    fsf    vsf
    1.0    1.0    0.0    0.0    1.0    1.0    1.0    1.0 -
April 15, 2024 at 12:52 pmAlex R.Ansys Employee
Hello Thomas,Â
In a single surface contact (A_GENERAL and A_SINGLE_SURFACE) the elements should be on a surfa (slave) side of a contact. Master side (Surfb) is not applicable for single surface contact.Â
In your case slave (surfa) is null. To make this contact work change SURFA with SURFB, assuming that Set PID = 2 exists.Â
Please find out the article about beam-to-beam (shell_edge) contact: /knowledge/forums/topic/how-to-model-contact-between-beam-elements/
Thank you,
Alex -
April 15, 2024 at 1:14 pmThomas LowerySubscriber
I am not have any success with this, I switched to using a mortor contact as suggested by the link. What I expect to happen is that I have two simple rings made of beams, I fixed one under the other can turn gravity on and the top ring should fall and bounce off the fixed bottom ring. But it seems no matter what I do they just pass thru each other.
*CONTACT_AUTOMATIC_SINGLE_SURFACE_MORTAR_ID
$#   cid                                 title
     1                                   Â
$#  surfa   surfb  surfatyp  surfbtyp  saboxid  sbboxid    sapr    sbpr
     1     0     3     3     0     0     0     0
$#    fs     fd     dc     vc    vdc   penchk     bt     dt
    0.0    0.0    0.0    0.0    0.0     0    0.01.00000E20
$#   sfsa    sfsb    sast    sbst   sfsat   sfsbt    fsf    vsf
    1.0    1.0    0.0    0.0    1.0    1.0    1.0    1.0
*PART
$# Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â title
Ring 1
$#   pid   secid    mid   eosid    hgid    grav   adpopt    tmid
     1     1     1     0     0     0     0     0
*SECTION_BEAM_TITLE
Ring 1
$#  secid   elform    shrf  qr/irid    cst   scoor    nsm   naupd
     1     1    1.0     2     1    0.0    0.0     0
$#   ts1    ts2    tt1    tt2   nsloc   ntloc
   0.226   0.226    0.0    0.0    0.0    0.0
*PART
$# Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â title
Ring 2
$#   pid   secid    mid   eosid    hgid    grav   adpopt    tmid
     2     2     1     0     0     0     0     0
*SECTION_BEAM_TITLE
Ring 2
$#  secid   elform    shrf  qr/irid    cst   scoor    nsm   naupd
     2     1    1.0     2     1    0.0    0.0     0
$#   ts1    ts2    tt1    tt2   nsloc   ntloc
    0.2    0.2    0.0    0.0    0.0    0.0
*SET_PART_LIST
$#   sid    da1    da2    da3    da4   solver
     1    0.0    0.0    0.0    0.0MECH
$# Â Â pid1 Â Â Â pid2 Â Â Â pid3 Â Â Â pid4 Â Â Â pid5 Â Â Â pid6 Â Â Â pid7 Â Â Â pid8
     1     2     0     0     0     0     0     0Â
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April 15, 2024 at 1:24 pm
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- The topic ‘Beam-to-Beam Contacts’ is closed to new replies.
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