@MikeHalloran:
I will look into some truss heads.
I have used Dzus fasteners much before but sadly they would not work for the geometry I am dealing with.
The CFRP shell is already made, no option of mold re-design. Definitely cannot reduce number, apparently they are significantly loaded...
@TVP:
I will do some more research including those links when I get some time (in between the thousand other projects I'm working on [wink]). But from a quick scan it seems those sources say there are stress concentrations, and that the shank diameter should be reduced for increase bolt...
@unclesyd:
Can't use rivets because the application requires easy assembly/ disassembly, which will be done rather frequently.
@TVP:
Those shear pin systems seem nice, but from a quick scan it looks like you need a special nut. My fastener needs to go into a blind tapped hole into some...
@hydtools
I have not seen those types of washers before. I will order some and run the profile by the hydro guys.
But, the height may be too large. Those washer are 7/64'' thick. I was looking into a bolt head that is only 1/32'' thick!! The low profile socket head cap screws had a head...
@KENAT
For the current application we are using a CFRP shell, so dimpling would not work.
We use undercut often in non-composite applications, but how do you think it would hold up for CFRP shell? How would you undercut countersink CFRP without ripping the fibers out.
I guess then you get into...
@KENAT:
-Minimizing weight to increase buoyancy (the vehicle needs to be positively buoyant).
-I will Look into aerospace fasteners.
-Trust me I wish I could use countersunk fasteners (and we usually do), but this application requires clamping quite thin walled sections that would not be...
Background:
I am designing a custom 10-32 threaded fastener for an underwater vehicle. The fastener head will be exposed on the surface of the vehicle and thus needs to be hydrodynamic (better than button or pan head), hence the need to custom design.
I am trying to determine the strength of...
