Breech analysis of aluminium pole?
Breech analysis of aluminium pole?
(OP)
Hi all
Some time ago I posted a question regarding how analysis of a circular pole with a breech opening undergoing bending might be carried out. I was pointed towards M S Troitsky's work on the matter, and all was well and good for steel poles.
However now I am faced with the same problem, but with an aluminium pole. Unlike steel, I don't have a feel for how it behaves. Looking at the Australian Standards on steel and aluminium, there appears to be a fundamental difference in design theory.
Does anyone know of any work that has been done on analysing aluminium poles with breech openings in bending?
Some time ago I posted a question regarding how analysis of a circular pole with a breech opening undergoing bending might be carried out. I was pointed towards M S Troitsky's work on the matter, and all was well and good for steel poles.
However now I am faced with the same problem, but with an aluminium pole. Unlike steel, I don't have a feel for how it behaves. Looking at the Australian Standards on steel and aluminium, there appears to be a fundamental difference in design theory.
Does anyone know of any work that has been done on analysing aluminium poles with breech openings in bending?






RE: Breech analysis of aluminium pole?
I first look at the gross cross section reduction and analyze based on the reduced cross section. Since most of the aluminum sections I deal with are rectangular, I apply the criteria of that section type under the Aluminum Association design criteria. If the section is close to the allowable stresses, I then do an FEA on the area around the breach, treating the section as joined plates with a hole in one of the plates.
Most of the time, the gross analysis is sufficient, as the members can be easily changed to accommodate the breach if necessary. Only in rare instances is it necessary to go further than the gross analysis.
RE: Breech analysis of aluminium pole?
RE: Breech analysis of aluminium pole?
The breach is usually for electrical access, as you surmised.
RE: Breech analysis of aluminium pole?
RE: Breech analysis of aluminium pole?
ishvaaag....I'm not sure I would include deformations in the FEA model, as those would be post-failure. The limiting stress criteria should be applied before that occurs, since plastic design in aluminum is not particularly reliable.
RE: Breech analysis of aluminium pole?