Solid 186 & 187 shape functions nomenclature - fast question

[omnnet]

Hello.

I really need urgent help just to understand de nomenclature of the shape functions for elements SOLID186 and SOLID187.

It is present in ANSYS help, and I even have the Zienkiewicz book, but I don't find the meaning of:

http://files.engineering.com/getfil...23008efff96&file=SOLID186_shape_functions.png

for SOLID186
r, s, t - what do these mean?

http://files.engineering.com/getfil...73d120f861e&file=SOLID187_shape_functions.png

for SOLID187
L1, L2, L3, L4 - what do these mean?


Thanks very much for your time!

 

[omnnet]

Can somebody help me?

I would really need it for Wednesday afternoon, I can't find anything!


Thanks in advance!