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How Plasticity of Simply supported beam 1D is calculated in abaqus?

How Plasticity of Simply supported beam 1D is calculated in abaqus?

How Plasticity of Simply supported beam 1D is calculated in abaqus?

(OP)
Hello,

I am trying to calculate simply supported 1D beam with fixed end on both sides subjected to U.D.L. Now according to analytical formula stress = M/Z , where M = Wl^2/12 at suppports and M = Wl^2/24 in middle and Z = bh^2/6 in case of elasticity and Z = bh^2/4 in case of plasticity for rectangular cross section. But abaqus shows less stress when it becomes elastic plastic where analytical calculation of beam shows more stress after crossing elastic limit. May I know what I am doing wrong here?


I do use true stress and true for analytical calculations ? is it because length of the beam includes strain from both ends at top which is in tension and compression in middle. I tried still stress seems far far higher than abaqus results. Please help me with this small assignment. Thanks in advance.

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