Design -- horizontal I-beam with center loading....

[Shady99]

I have an i-beam placed horizontally and i want to apply 1 ton point load on its center. Now i will run a stress analysis on ansys on it and will get the displacement in the beam on the mentioned load. How will i know tht the displacement value i am getting is good or bad?

 

[billy_joule]

A point load on a beam is straight forward to calculate analytically:
https://en.wikipedia.org/wiki/Deflection_(engineering)

 

[Shady99]

Yes it is. But i am asking tht when i find the deflection. How would i know that the deflection value is good or bad?

 

[billy_joule]

Yes it is. But i am asking tht when i find the deflection. How would i know that the deflection value is good or bad?

If your simulation result agrees with an analytic solution then it's good.

 

[Shady99]

Thts alrite. I find deflection analytically and thru ansys and both values validate each other. But tht wud not be the measure tht specific amount of deflection is good for the beam or not ?

 

[Nidum]

I beams are generally used in applications where only very small deflections are acceptable .

0.33% of beam length between supports is a commonly used limit for general engineering .

There are code requirements for maximum deflection of beams used in structural engineering .

Really though it is a matter of engineering judgement - what deflection is acceptable for your application ?

In any case I strongly advise you to get a qualified engineer to validate your design .

 

[Shady99]

“0.33 % of beam length”.can you please tell me the source of this info?