Hi All,
When considering steel bolt shear and tension interaction failure I use the Rt2 +Rs3 < 1 failure criterion. Where Rs and Rt are the ratio applied load / allowable load in shear and tension. I have never considered the pre-tension load in the bolt in this calculation.
Recently the...
Hi All,
I usually work on Aerospace projects but have ended up sizing a new Stand Off Clamp design and wanted to run a few things past the group.
I have been advised by the customer of an pipeline operating pressure that they wish to be able to claim, they have advised that we should apply a...
Hi All,
I have a (non aerospace) installation where due to a lack of access I was considering using either a socket head bolt or 12 point head bolt and I would apply the torque from the head side while holding the nut fixed with a custom made tool. I think you would usually apply the torque...
Often you will see in articles the author stating that a FE model has xxx DOF to indicate how long it may take to run or to convey approximately how big the model is.
Could someone explain how I can get the number of DOF from either Patran or from Nastran output files?
Thanks :)
Hi All, I have looked through the previous threads on this topic but still having trouble.
We are using NX 7.5 on a Windows machine
The background to this problem is we have an assembly that we want to export to a FEM program called Ansa. After testing the different ways of exporting the...
Hi All,
I need to determine the vertical bending stiffness and torsional stiffness for an elevator at a number of spanwise locations. We have target stiffnesses at each location that the design must meet/exceed.
However, I am not clear on how I can use the fine grid FE model that I have...
