General Mechanical

General Mechanical

What is the meaning of repetitive node indices and the 0th node from an ANSYS element list file?

    • landins
      Subscriber

      Hi, I posted my question at Stack Exchange before, but got no answers yet:


       


      https://engineering.stackexchange.com/questions/18865/what-is-the-meaning-of-repetitive-node-indices-and-the-0th-node-from-an-ansys-el


       


      Could you help me? 


       


      This element list file is not generated by me. Most lines are OK, but I can't understand some of them.


       


      The initial lines are like this:


       


       


       LIST ALL SELECTED ELEMENTS.  (LIST NODES)


       


       ***** ANSYS - ENGINEERING ANALYSIS SYSTEM  RELEASE 15.0      *****


       ANSYS Multiphysics                                


       00207328          VERSION=WINDOWS x64   148:49  JUL 14, 2015 CP=      8.705


       


        200           


       


       


                                                                   


       I find some confusing lines as follows. One example is this: 


       


       


       


          ELEM MAT TYP REL ESY SEC TSHA       NODES


       


         93330   1   1   1   0   1       216828  134951  134975  134975  134942  134942  134942  134942


                                          217733       0  134975  217734  134942  134942  134942  134942


                                          217735  134818  134820  134820


       


       


      Is it a 20-node hexahedron element?


      Nodes like '134942' appear multiple times. What does that mean?


      What does the index '0' mean? I don't have the 0th node in my node list file. 


      Another example is like this:


       


       


          ELEM MAT TYP REL ESY SEC TSHA       NODES


       


        107468   1  13   8   0   1 QUA8   21597   21599    8899    8901   21598    8892    8900    8893


       


       


      and this: 


       


       


       


         53885   4   4   4   0   4 TRI6      10      11    1436    1436    5267    5275    1436    5271


       


       


       QUA8 is OK to me, but why TRI6 have 8 node indices (with two repetitive indices)? What does that mean?

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