I am sorry sir, i have problem to find the proper formula of von mises to compare with solidworks simulation, i try to solve simulation railway profile bending with lenght 600 mm and force in middle, and restraint in both, I have solve with simple formula σ = M / Z but it to simple, i need a proper manual calculation formula, thank you |

Is this a question about SolidWorks, or how to do a simple beam calculation? I would assume you went to school to learn these things for yourself. :-)

Basically, you need to follow some simple principles, where the max moment is and where the shear stress is zero. Because the load is being applied in dead center, the max moment and zero shear should be in the center. So the reaction forces for both sides should be the same. Find the reaction moments for settings the moment = zero (because the reactions should have no moments)

Afterwards, you calculate the max moment where the distance is from the end to the center (So Rx - Wx, W = applied load, x = distance from the end to center). Afterwards, use the Stress formula which is = Mc/I where c = distance from neutral axis and I = intertia of the cross-section.