Limits of Roark's formula for buckling of shell
Limits of Roark's formula for buckling of shell
(OP)
Hello,
I would like to understand what kind of error results from using Roark's formulas for the buckling of a thin tube when the thickness of the wall, in fact, is larger than the the "1/10 of radius" limit for their validity. Are the predictions obtained conservative (undervalue of crush pressure) or dangerous to use (overestimate of crush pressure)?
My thickness to external radius ratio is 1/4 and I am mostly interested in the long tube with free ends case (but interested in the other loading cases as well).
Are there derivations that work for thicker walls?
What does the experimental evidence show?
Thanks,
mlbtx
I would like to understand what kind of error results from using Roark's formulas for the buckling of a thin tube when the thickness of the wall, in fact, is larger than the the "1/10 of radius" limit for their validity. Are the predictions obtained conservative (undervalue of crush pressure) or dangerous to use (overestimate of crush pressure)?
My thickness to external radius ratio is 1/4 and I am mostly interested in the long tube with free ends case (but interested in the other loading cases as well).
Are there derivations that work for thicker walls?
What does the experimental evidence show?
Thanks,
mlbtx





RE: Limits of Roark's formula for buckling of shell
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: Limits of Roark's formula for buckling of shell
Thanks again,
mlbtx
RE: Limits of Roark's formula for buckling of shell
Steve Braune
Tank Industry Consultants
www.tankindustry.com