Hoop Stress in Bending of Thin-Walled Tube? 1

[whistleboy]

Greetings, can someone either direct me to a previous post (I've searched, but not found answers) or help simply answer the following?:

1) Do thin-walled tubes experience hoop stresses when subjected to bending? (tube is open at both ends - no pressure)

2) Are hoop stresses only present in sealed/closed structures subjected to internal or external pressure?

3) If hoop stresses are created during bending, how do I calculate these?

Thank you!

 

[rb1957]

tubes develop hoop stresses in reaction to pressure loads.

tubes in bending develop flugge (i think) stresses as the tube changes shape.

 

[whistleboy]

Thank you. As I research this more and more, I think really trying to understand the circumferential stresses that occur in the thin walls of a tube during bending when the tube has ovalized, then when the tube has buckled. Any help would be appreciated.

Thanks!

 

[rb1957]

google "flugge stress", get to NACA 2612. he starts with pressurised cyclinders and goes on to cyclinders in bending (by way of more math than i've seen in a while)

 

[whistleboy]

Wow, that was quite the find...thanks very much for your time.