Louis_Leblanc
Mining
Hi.
Im currently an intern in a small hydraulics company in Northern Quebec and my boss gave me the norm: "ISO/TS13725:Hydraulic fluid power-Method for evaluation the buckling load for a hydraulic cylinder" and asked me if it was possible to write a computer program that would use the method and equations given in the norm to caclulate the critical buckling load for given cylinder dimensions. Ive written a MATLAB programm to apply the linear equations given in the document but im facing 2 problems:
1)The document is very sparce in information!
Basically the document specifies the method to caclulate the critical buckling load using a series of linear equations based on the works of Fred M. Hoblit in the 1950's, but never goes in detail nor does it gives good examples of an successful numerical application, so I have no way to know if im even writing my program correctly or if my results are adequate.
2) The references given are impossible to find.
The ISO standard cites two references: one is the NFPA/T3 6.37 norm, which i dont have but suppose is pretty much the same document. the second reference is "HOBLIT F., Critical buckling load for hydraulic actuating cylinders, Production Engineering, 1950 July."Which im pretty sure the norm is based on. Ive tried to find the book/volume/document (not even sure what it is) for some time now. It doesnt appear in my University library nor could I find it online. I even took the time to write an email to the ISO technical comitee manager (the people that wrote the norm) and they didn't bother to give me a reply.
So as of right now, I have a really messed up MATLAB program that doesn't work and I have no idea as to how I can get it to work. I just really feel I need some additionnal info on the method itself, but as ive said, the referenced book is impossible to find. If anybody has any idea as to where I could find a copy of the work from Mr Hoblit, or even just a copy of the relevant pages, it could really help me. I know there are some really easier method to calculate buckling load on cylinders, but my boss wants to use the same method as the ISO norm, so that the calculations are up to standards. Any help is appreciated!
(P.S: I would like to drop the PDF of the ISO norm on here but I think I dont have the right to do that.)
Louis Leblanc
Mechanical engineering student,
Université de Sherbrooke,QC,Canada
Im currently an intern in a small hydraulics company in Northern Quebec and my boss gave me the norm: "ISO/TS13725:Hydraulic fluid power-Method for evaluation the buckling load for a hydraulic cylinder" and asked me if it was possible to write a computer program that would use the method and equations given in the norm to caclulate the critical buckling load for given cylinder dimensions. Ive written a MATLAB programm to apply the linear equations given in the document but im facing 2 problems:
1)The document is very sparce in information!
Basically the document specifies the method to caclulate the critical buckling load using a series of linear equations based on the works of Fred M. Hoblit in the 1950's, but never goes in detail nor does it gives good examples of an successful numerical application, so I have no way to know if im even writing my program correctly or if my results are adequate.
2) The references given are impossible to find.
The ISO standard cites two references: one is the NFPA/T3 6.37 norm, which i dont have but suppose is pretty much the same document. the second reference is "HOBLIT F., Critical buckling load for hydraulic actuating cylinders, Production Engineering, 1950 July."Which im pretty sure the norm is based on. Ive tried to find the book/volume/document (not even sure what it is) for some time now. It doesnt appear in my University library nor could I find it online. I even took the time to write an email to the ISO technical comitee manager (the people that wrote the norm) and they didn't bother to give me a reply.
So as of right now, I have a really messed up MATLAB program that doesn't work and I have no idea as to how I can get it to work. I just really feel I need some additionnal info on the method itself, but as ive said, the referenced book is impossible to find. If anybody has any idea as to where I could find a copy of the work from Mr Hoblit, or even just a copy of the relevant pages, it could really help me. I know there are some really easier method to calculate buckling load on cylinders, but my boss wants to use the same method as the ISO norm, so that the calculations are up to standards. Any help is appreciated!
(P.S: I would like to drop the PDF of the ISO norm on here but I think I dont have the right to do that.)
Louis Leblanc
Mechanical engineering student,
Université de Sherbrooke,QC,Canada
