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Triangular elements with 4 nodes?

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Old   December 31, 2020, 15:26
Default Triangular elements with 4 nodes?
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Hello forum,


i have generated a triangular shell mesh for a surface. After the output as a LS-Dyna key-file, i noticed that there are 4 nodes per element. How can that be? Triangular elements should have only 3 nodes?
I got an output like this:


*ELEMENT_SHELL
$# eid pid nid1 nid2 nid3 nid4
1 1 23 21 24 24
...


So the nid4 is just the nid3. What am i doing wrong?


Has someone a clue and would help me?


Best regards.
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Old   January 1, 2021, 06:04
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Maries
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Collapsed cons? Check the geometry once again.
Second order element should have 6 nodes. So this is not second order element. Let us know once you solve this.


Quote:
Originally Posted by SuperSonicCat View Post
Hello forum,


i have generated a triangular shell mesh for a surface. After the output as a LS-Dyna key-file, i noticed that there are 4 nodes per element. How can that be? Triangular elements should have only 3 nodes?
I got an output like this:


*ELEMENT_SHELL
$# eid pid nid1 nid2 nid3 nid4
1 1 23 21 24 24
...


So the nid4 is just the nid3. What am i doing wrong?


Has someone a clue and would help me?


Best regards.
rmaries is offline   Reply With Quote

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