Diagram: http://i177.photobucket.com/albums/w222/77whtrocco/NORMALSTRESS.jpg(adsbygoogle = window.adsbygoogle || []).push({});

Given: members AB, CD, and EF have x-sectional area of 25 mm^2. E = 200 GPa. Neglect deformation in member GH.

Find: Normal Stresses in members AB, CD, and EF.

I know that I need to determine the axial forces in these members, but it's been a while since I took a statics class.

Isolating member GH, I have come up with...

Sum of M about G = 0 = 5000(1.6m) - AB(.4) - CD(.8) - EF(1.2)

and I have concluded that the reactions at G, A, C, and E are zero for "x" components (ie. Gx = 0, Ax = 0, Cx = 0, etc)

I should also not that AB is basically equal to reaction Ay, CD = Cy, EF = Ey. I am trying to solve for these values. Thanks.

Now I'm stumped... What else is there? I'm confident that after finding these forces I can solve for the stresses.

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# Homework Help: Normal Stress in members of a stystem

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