You can do as you please although more common is to use countersunk rivets and buck against the nut plate. Or you can use these and will need no rivets.
https://www.clickbond.com/products/nutplates/
Perhaps drill on both sides slowly so you don´t get breakout on the farside. If you are getting delmamination in general there is too much heat and speed in drilling.
You don´t worry about the AA section but just the AA but just deal with the BB section where you have a hard point a a stress build up due to pin loading through the doubler. That is why you only analyze that section and estimate the loads at the doubler perimeter fasteners using Tom Swift or...
The beams have cross section just like a shell and will exhibit the same stiffness. If using MyStran bushing it makes sense to put the plates coincident as the bush element in Mystran is a 1D spring acting in the X direction. This bushing is 3D. The straps are 0.04 and 0.05 inches. More...
We model the doubler and skin using B21 elements (3D deformable, linear analysis). Loads and boundary conditions are as applied in the figure
We define a bushing connectors between the doubler and skin at the fastener locations with these properties (spring stiffness 159565.98 lbf/in -...
See original here of problem. I want to know best way to solve with Abacus using connector elements to find bypass and bearing loads in complex joints starting with this one.
https://www.eng-tips.com/viewthread.cfm?qid=490551
This is getting to be quite the exciting post. If you read my original post I was working a problem from a Boeing 777 structures course by hand and I wanted to know how it compared with FEM as the course suggests and the modeling it suggests. That was the question and that is all. I have since...
Rb1957 explain to me in detail how you would setup a finite element model to model this? I actually like this approach because it makes it very visual especially if you have several straps. The offset between applied load and the reaction is the same as I have adjusted the diameter of the...
I got it to work using the beam methodology above with a fastener length of 1 inch. I had to use Y-symmetry on all nodes to guide the whole structure along the X axis. Great to know that this works as it is a very simple approach. Does not include secondary bending but gives me bypass and...
The standard is Performance Standard for Seats in Civil Rotorcraft, Transport Aircraft, and General Aviation Aircraft AS8049D
https://www.sae.org/standards/content/as8049d/.
25.561(b) gives you the inertia loads to work with.
https://www.eng-tips.com/userinfo.cfm?member=Ng2020 why do you use rod elements that can only carry axial loads and torsion and not bar elements that have bending?
The Huth fastener flexibility gives values with units of m/N. Do you just use the inverse of this for the PBUSH K stiffness value...
