energy methods of buckling

Buckling - Wikipedia, the free encyclopedia

I have checked those books in the references out, but none of them contain problem excercises, and I like excercises to learn.

ASK THE TEACHER!!!!!!!!!!!!!!!!

he didnt know, they use materialwritten especially for us that has been used for 30 years. I think the material is based on Timoshenkos book. They have made excercises for us, but I would like to find more.

This will come as a shock, I know, but you may have to do your own research, instead of waiting for someone who got the proper education to supply the answers to you.

This will make you more valuable than the instructors at your school. Then the question becomes, will you share your newfound knowledge with others or hoard it because you took the time and effort to find it on your own?

In a way I do agree with you. Before when I've learned new methods, I have also designed more difficult problems than the books have to solve for myself. And designing your own problems is a great way because then you really get to see how the methods work.

But I do feel that learning this way is something you do when you have learned the method good. I mean, for someone learning algebra the best way for learning the methods is by doing excercises. How can you reesearch if you don't know the methods yet? And I don't know if you are aware of this but real research in buckling with energy methods require a solid knowledge of variational principles, I have only come to linear algebra in my mathematics course. We are also not suppose to do research but only learn how to calculate the buckling load for different systems.

I don't know if it was any pint with this point, because it seems like you come with bitter answers all the time, fir WIKIPEDIA, then ASK THE TEACHER, and now you are telling me to do reesearch about a topic I know allmost nothing about, to do research one need some solid theoretical knowledge of how structural mechanics works, and it is this knowledge I am trying to get.

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Does anyone else have any useful input?:)

"Theory of Elastic Stability" by Timoshenko and Gere is the most frequently cited reference on buckling of bars and frames. Except for the simplest cases, the mathematics involved in most of these methods is quite difficult.

Determination of critical loads by successive approximations is treated in the above captioned book and is my preferred way of calculating elastic buckling loads for unusual columns such as changes in cross sections.

Most practicing engineers do not select members which are susceptible to buckling, so most practicing engineers do not carry out such calculations on a frequent basis. To use a complex mathematical method in the design of a real structure would be a risky business and cannot be recommended. A structural design engineer must have confidence in what he is doing. Differential equations are usually not tools used by most structural engineers.

Do not be so quick to dismiss the references given by lynlynch. I have glanced through it and find there is some good material in there, particularly with regard to understanding the concept of the energy method.

Thank you very much Bruce. I also went thorugh the info he provided me.

I also have Timoshenkos book, it is very good yes. But it does not contain any problem excercises which is what I am looking for. I do understand the method, but I need excercises to get better and practice to my exam.

"Most practicing engineers do not select members which are susceptible to buckling, so most practicing engineers do not carry out such calculations on a frequent basis."

I think they do in the oil-business. ;)

Try Den Hartog.

He is half way between normal books and Timoshenko.

Strength of materials

Advanced strength of materials

Both books are worth buying and not expensive. Indeed he has also done some other books that can be useful.

I have used energy methods for buckling for initial analysis and then used the non linear FEA for final checking. The results compare very well but it depends how you use them.

Thank you very much, I will check them out! :D

Hey again omw7 :). I have now used the book for some time and the excercies are just what I wanted!, I am so glad I got the book after all this time.

I am a little spoiled so I'd like more of these excercises if you know about any more books like this one? If not, I am still very grateful for the tips of Hartog! :D