Engineering Power Tools - Slenderness Ratio
Engineering Power Tools - Slenderness Ratio
(OP)
Good morning and Merry Christmas.
My question is in regards to buckling in columns. I started using the Engineering Power Tools download to check my calculations. I have run into two challenges I hope you can help me with.
1. I get a different critical load when using Johnsons formula. I have checked my hand calcs over and over. I know it is right as I am using a textbook from college for a reference.
2. The slenderness ratio calculated by the software is different than what I solve. I also noticed the slenderness ration does not change when the end conditions are changed (ie fixed-fixed, fixed-free, etc).
I am calculating the slenderness ratio by multiplying the end condition constant (K) by the length and dividing the result by the radius of gyration.
Is this wrong, or is there a flaw in the program? Any thoughts?
Daniel
My question is in regards to buckling in columns. I started using the Engineering Power Tools download to check my calculations. I have run into two challenges I hope you can help me with.
1. I get a different critical load when using Johnsons formula. I have checked my hand calcs over and over. I know it is right as I am using a textbook from college for a reference.
2. The slenderness ratio calculated by the software is different than what I solve. I also noticed the slenderness ration does not change when the end conditions are changed (ie fixed-fixed, fixed-free, etc).
I am calculating the slenderness ratio by multiplying the end condition constant (K) by the length and dividing the result by the radius of gyration.
Is this wrong, or is there a flaw in the program? Any thoughts?
Daniel





RE: Engineering Power Tools - Slenderness Ratio
Try a few cases with different end conditions (set L/r = 1) and check the results (k). If still do not agree, send them an inquiry and let us know the answer.
RE: Engineering Power Tools - Slenderness Ratio
Does anyone else use this program? I just downloaded it yesterday as a coworker pointed me in the direction. I have let him know of the issue I have, but have not heard a response.
RE: Engineering Power Tools - Slenderness Ratio
I have not used the tools to which you refer however I have a link here to another online calculator which might be of use:-
http:
The slenderness ratio is L/r where L is the length of strut and r is the least radius of gyration of the section.
desertfox
RE: Engineering Power Tools - Slenderness Ratio
Here is another which might be better than the last one
http://
desertfox
RE: Engineering Power Tools - Slenderness Ratio
RE: Engineering Power Tools - Slenderness Ratio