Bending "Pt.1"
Introduction :
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•We saw in previous chapters that we can sort the loads that act on the truss or system .
•If the system loads by a moment on its sides this named (bending) .
•And this system can be named as a(beam) .
•The beam bends around the normal axis (z) .
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BENDING
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It’s the straining of metal around a straight axis . During this process , the metal on the inside of the neutral axis is compressed , while the metal on the outside of the neutral axis is compressed , while the metal on the outside of the neutral axis is stretched .
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Thin beam theory
Euler Bernoulli beam theory
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First we should have a reference to calculate the moment .
In these two previous cases the moment is positive according to the right hand rule .
In pure bending moment ,There are some asumptions:
1) The normal lines remain normal .
2) Thin structure .
3) Small deflection < thickness .
Calculation of second moment of area :
Powerpoint Presentation :
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