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Duplicate element IDs in the same deck runs without error. Why?

sudhish.kumar
I have a Sol101 analysis deck that has a set of element Ids that are duplicated.
 
A set of CTRIA3 /CQUAD4 elements have been given the same ID as that of another set of CBEAM element.
 
I am not seeing any fatal error or warning in the F06 file.
 
Why is this happening?
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  • 0
    The PLOAD4 entry only applies loads to 2d and 3d elements... so there will be no issue for 2d or 3d elements with the same id as 1-d elements. But, if there are 2d elements with the same id as 3d elements, then the PLOAD4 will apply the loading to the 2d elements if G1 and G3 (fields 8 and 9) are NOT defined on the PLOAD4... if G1 and G3 are defined, then the PLOAD4 will apply the load to the 3d elements.
     
    I suggest you make a sample input file with the types of duplications you have and test out how the PLOAD4 operates. You can add OLOAD=ALL to the case control and see the resulting applied loads in the f06, and check that they are going to the correct grids.
     
    For your specific question, as long as G1 and G3 are not defined, it should work as you are intending and only apply load to the 2d elements.
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  • 0
    The PLOAD4 entry only applies loads to 2d and 3d elements... so there will be no issue for 2d or 3d elements with the same id as 1-d elements. But, if there are 2d elements with the same id as 3d elements, then the PLOAD4 will apply the loading to the 2d elements if G1 and G3 (fields 8 and 9) are NOT defined on the PLOAD4... if G1 and G3 are defined, then the PLOAD4 will apply the load to the 3d elements.
     
    I suggest you make a sample input file with the types of duplications you have and test out how the PLOAD4 operates. You can add OLOAD=ALL to the case control and see the resulting applied loads in the f06, and check that they are going to the correct grids.
     
    For your specific question, as long as G1 and G3 are not defined, it should work as you are intending and only apply load to the 2d elements.
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