This is not a mathematics problem except in the very rudimentary sense of recognizing that "250" lies between 200 and 300.
Now what do "elastic limit" and "ultimate bending stress" mean?
A steel beam has an elastic limit at 200N/mm2 and an ultimate bending stress at 300N/mm2.
Predict the structural consequences of a bending stress of 250N/mm2
Can sombody shoe me how to work this out please??
stress occurrs in beam as a result of loading it (local deltaF/deltaA).
elastic limit: maximum stress you can subject beam to and still have it return to original shape.
ultimate bending stress: stress at which rupture occurrs.
After reaching elastic limit plastic deformation starts to take place.
After 250, the beam will be permanently deformed.
elastic: returns to original shape after deformation.
ultimate: max (breaks)
So if you go beyond the elastic limit but donít break it you will have permanent deformation.
It is a mathematics question in the sense of drawing logical conclusions from given numerically quantified information.