great tut, but somehow i believe it is inaccurate. there should be contact defined between bolt and the holes on the flange. and the nut should be defined as lock contact and not frictional. maybe then you will have different result, as right now its showing your bolt is weak. with the help of nut defined as "lock" similar to real world, it might prevent the flange from moving after external load is applied.
I have been studying on bolt connections in Ansys nearly for 1 month. I have real world experiment results about maximum pretension force for a bolt. I modelled the bolt in Solidworks as exactly same and simulated in Ansys. Von Mises stress in Ansys gives me 3 times higher result with respect to real world experiment. Later i simulated the bolt in Ansys by using bolt thread option under connections. Ansys gave me nearly same result with respect to first simulation. Namely, i can not take result same with experiment. (There is no mesh or modeling problem). If one can compare any bolt connection experiment result with Ansys result, we can find the reason of wrong result. Thanks
Why the contact should not including the bolt shaft and through hole? In reality the bolt would need to take certain shear force? Wouldn't them? Thank you very much.
how to know the corresponding friction value for frictional conctact? my work have bolts AND NUTS with AISI 4340 and flange with AISI 4140, bushes and washers also present. for them what values should i give? please reply.
I created the CAD model in SolidWorks and NX. I triple checked the contacts, but for some reason my solution has errors. I can send you the input files or the CAD files
Thanks for your great effort!
20KN of pretension? Isn't that too excessive? This flange could support a weight of a truck it seems.
Thank you, very useful
great tut, but somehow i believe it is inaccurate.
there should be contact defined between bolt and the holes on the flange. and the nut should be defined as lock contact and not frictional.
maybe then you will have different result, as right now its showing your bolt is weak. with the help of nut defined as "lock" similar to real world, it might prevent the flange from moving after external load is applied.
I have been studying on bolt connections in Ansys nearly for 1 month. I have real world experiment results about maximum pretension force for a bolt. I modelled the bolt in Solidworks as exactly same and simulated in Ansys. Von Mises stress in Ansys gives me 3 times higher result with respect to real world experiment. Later i simulated the bolt in Ansys by using bolt thread option under connections. Ansys gave me nearly same result with respect to first simulation. Namely, i can not take result same with experiment. (There is no mesh or modeling problem). If one can compare any bolt connection experiment result with Ansys result, we can find the reason of wrong result. Thanks
Why the contact should not including the bolt shaft and through hole? In reality the bolt would need to take certain shear force? Wouldn't them? Thank you very much.
can u upload the 3D model or of bolted flange gasket
how to know the corresponding friction value for frictional conctact?
my work have bolts AND NUTS with AISI 4340 and flange with AISI 4140, bushes and washers also present. for them what values should i give? please reply.
check from norbar website, you can find it in the bolt table as per the bolt grade.
It was just "Excellent" . Why have you stopped uploading .
can i ave 3d model
I created the CAD model in SolidWorks and NX. I triple checked the contacts, but for some reason my solution has errors. I can send you the input files or the CAD files
ok thank u can
can i ave the cad file
anto naveen dp grabcad.com/library/flange-nuts-and-bolts-1