One more attempt. Input file is here
P5701178-02-214_BoltedConnectionFEA.zip (1.5 MB)
Metal to metal contact, no gaskets involved.
There are 4 bolts in L pattern.
First assumption is that they are M10 Class 4.6 bolts with Proof strength of 225MPa and for Pre-Load we go upto 90% of proof strength thus Pre-Load = 15.9kN
Contact pressure I get for this is shown below. Pressure = 1.094 Pascals
For second assumption bolts are M10 Class 8.8 with Proof strength of 600MPa and Pre-Load = 42.4kN
Contact pressure I get for this is shown below. Pressure = 3 Pascals
Pressure increased from around 1 Pascals to 3 Pascals as the Pre-Load increased from ~15kN to ~42kN
My question is, why is the contact pressure so small?
What can I do to get realistic results?
Thanking in advance.