Reducing deflections on a double cantilevered tube
Reducing deflections on a double cantilevered tube
(OP)
I need to reduce the deflections on both ends of a 10" diameter by 10 foot long tube. I was wondering if I were to place a rod in tension on the inside of the tube that reacts on each end of the tube would I accomplih my goal of stiffening the tube. I cannot place any stiffening elements on the outside of the tube since it rotates about its center axis.






RE: Reducing deflections on a double cantilevered tube
Consider using a different material to reduce the self-weight, increase the moment of inertia, or provide linear stiffeners on the inside face of the tube.
RE: Reducing deflections on a double cantilevered tube
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Reducing deflections on a double cantilevered tube
EIT
www.HowToEngineer.com
RE: Reducing deflections on a double cantilevered tube
RE: Reducing deflections on a double cantilevered tube
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Reducing deflections on a double cantilevered tube
an interference fit inner sleeve ?
but how is the end of a cantilever deflecting ? ... if it's cantilevered slope is zero ??
RE: Reducing deflections on a double cantilevered tube
A tensioned rod will actually increase deflections if it is centered on the tube at each end because it operates at a variable eccentricity in the central region.
A tensioned rod located above the c.g. of the hollow section will tend to cause more compression in the top fibres than the bottom fibres. In the absence of external load, such a beam would deflect upward. When external load is applied, the combined deflection would be less than a similar beam without the rod.
BA
RE: Reducing deflections on a double cantilevered tube
BA