Merged nodes

[JOYE]

Dear Prof,
I want to know how to specify the node-based material property.
Like if I have three blocks and I specify three material set w.r.t. blocks and I want to change the material property of a particular node of any block by considering a new material set for that node as no.4.
Also, I was thinking to do that with" Include, file" in the input file but because of the TIE command, some nodes are been deleted, and so it's not possible to execute.
Kindly advise me.

Thank You

[Prof. R.L. Taylor]

In FEAP the MATErial sets are associated to ELEMents, not nodes. 

Thus, if you have a node based model you will have to devise your own data model and do the coding. Perhaps if you can describe how you are doing the model we can help more.

[JOYE]

Thank you for your reply, Prof.
As I am using the TIE command in my problem and therefore some nodes are merged and are been deleted. So, please let me know how to extract nodes and element specifications with all the nodes and elements.
Thank You.

[Prof. R.L. Taylor]

If you do and OUTM you will get an input file with no missing nodes or elements.  The numbering will be different from your original problem.

The other way to see which nodes are deleted is to output the array NDTYP, the nodes which exist have zero "0" values, merged nodes have nonzero (usually negative numbers).

But again note NODES DO NOT BELONG TO MATERIALS -- in finite element methods the elements are associated with the particular, constitution and thus in FEAP the material sets - MATErial set data.