Dear Folks,
I am using Solid Elements for analysis & design block foundation for machine. As I understood from various literature that Sxx, Syy, Szz are normal stresses in the Global X, Y, Z directions respectively. The negative value would mean compressive stress and positive would mean tensile. Now if I am reading Solid center Stress summary where it is showing only maximum stress values as –ve values. That means its max compressive stress & no mention of any +ve (tensile) stress however if I check graphically solid stress contours there are traces of +ve (tensile) stresses.
Now my queries are:
1) Is there something wrong with summary table we are getting in staad ?
2) Should we refer summary only for max compressive stress ?
3) Should we refer only graphically solid stress contours for correct stress values ?
STAAD.Pro Version used : STAAD.Pro CONNECT Edition - Version 21.00.02.30
If someone is having any clue about this then please reply, your response will be highly appreciated.
Thank you !
first: you got incompatible elements
second: rigid elements are there really rigid?
third: masses of the compressor components correctly input?
fourth: I see piles under, where/how did you compute the stiffness?
fix all the above problems then may be stresses might be correct. This is
FEM, so deformations are only estimates, therefore stresses computed from deformations
are even less accurate.