I am testing a steel unit installed in concrete to trying and asses the failure point in the concrete.
I am getting a very strange FOS plot on the concrete in the results, this assembly is symmetrical so only doing 1/4, all loads restraints and material properties are correct. There is nothing untoward in the stress plot or other FOS plots.
There seem to be high differances going from one elemant to another.
Can anyone shed any light on this and why it might be happening, it is repeatable across multiple differant parts.
2012 X64 SP4
Linear static study