It's a rated connection that works according to the manufacturers.
It's a rated connection that works according to the manufacturers.
BTW, give me a link to a grade 8+ rated HT wing nut pls
Because CAD full of stds for fasteners doesn't have one
I'm no expert, if a wing nut doesn't work then a nut. Just saying...
"When they fly off" how are they flying somewhere?
Because "snatch straps" ?? Please explain?
Bro, do you evenQuote:
Originally Posted by Islandnomad
- CAD model?
- Finite element analysis?
- Understand basic principles of pressure, force, mechanics, and tensile strength?
Sorry for the delay in replying. Been a bit busy...
https://www.aulro.com/afvb/images/im...015/04/554.jpg
Basic model of plate, 2mm HT Steel.
https://www.aulro.com/afvb/images/im...015/04/555.jpg
Side view of plate, under 5000kg load.
https://www.aulro.com/afvb/images/im...015/04/410.jpg
Red area is 9.534mm PLASTIC (permanent) deformation.
https://www.aulro.com/afvb/images/im...015/04/556.jpg
Just for interest loaded at 90deg.
And here's a replacement rear bar for a D2, winch mount. Loaded at 20tonnes. Mounted to original bar mount and two rear crossmember tow bar bolts. 6mm plate steel, HT bolts and capscrews.
https://www.aulro.com/afvb/images/im...015/04/557.jpg
^-- Like that.
I'm impressed mate! So at 5000kg it deforms but doesn't shear? So its a pretty strong bit of kit isn't it?
Then you're easily impressed.
Thats 5000kg static slow applied load. There's far more at play than a simple FEA test. THAT result is in no way reflective of a pass. Given that there should be 2:1 margin after safety factors of (used for say climbing equipment) of 5:1. At 5000kg there should be zero deflection. Put a snatch strap on that and it's a deadly missile waiting to happen, they will apply easily 3 x actual load and probably more depending on the strap itself.
The bar in the last pic at 20tonnes has 7mm of total deformation. Most of that is in the eyebolts (5mm) and they're only 2tonnes (at the moment). Their deformation is also plastic, the bar movement is elastic. And we haven't put an additonal reinforcing plate behind the bolts which will remove the face deformation. But also needs to be balanced with not being too rigid.
What surprised me is the strength of the OEM outer chassis mounts.