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Different Stress Values between brick, beam and hand calculation?

Hello Everyone,

I have run a simple beam simulation of a cantilever pipe. I calcualted it with 8-Node brick elements, beam elements and hand calculation. At the up and low edge of the beam connection to the wall, I got maximum stress values as expected. While the beam and hand calculation results are similar  (40 MPa), brick element calculation is higher. (50Mpa). Interestingly the finer the mesh of brick elements the higher the stress values. I couldnt figure out the reason of it. Can any one say a comment?

 Thanks in advance

 Murat

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