Hi all,
I wondered the real significance of that measure that you have when you create a fastener.
In my opinion it is the value of pressure in the little area around each hole, whose diameter you can indicate in the fastener tab.
But in mechanics normally the pressure/tension is positive when there is a traction and negative for the compression.
In my simulation I have a positive value when I expected a negative value because the plate does not lift.
Is there something wrong in my simulation or in my observation?
The first two analysis are made with screws preloaded, where in the Analisi_2 I correct the values of preload with the value of the Analisi_1.
Fi= required preload input
Fn= Nominal Load input in static analysis
Fp= Tensile force reported in static analysis.
Fi = Fn^2/Fp
In the Analisi_3 I've tried without preload.
My goal is to see the load on each screw M12 - 8.8 (640 MPa Sy) where
Fn = 0.8 Ar * Sy
Ar = resistant area
Regards
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