Small question about a structural calculation i made

Small question about a structural calculation i made

Hello.

I have to calculate when this beam starts to bend. It's fixed on both sides and made of aluminum. http://ift.tt/2sEGIEw I took the formula of max stress = M x y / i

I calculated a intertia moment of 67500mm4 for a beam of 30x30mm 2mm walls. so y is 15mm.

I need to get a maximum force the beam can handle, so I have two equal forces called X. I calculated a Max moment of 1300X newton millimeter. For the max stress I took 70000n/mm2

I come to the conclusion the maximum force X is 242 kN. This seems pretty high and I don't have the answer, did I so something wrong?

Submitted June 22, 2017 at 07:07AM by tunkor
via reddit http://ift.tt/2rUTnWM

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Small question about a structural calculation i made

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