Product Second Moment of Area Ixy - Help

AI Thread Summary
The discussion focuses on calculating the second moment of area (Ixy) for a non-symmetrical T-shaped beam. The user is struggling with the term Ixy g in the formula, which includes the area and centroid coordinates. Clarification is sought on what "g" represents, with the assumption that it refers to the centroidal axis. Another participant suggests using Steiner's rule to compute Ixy g effectively. The conversation emphasizes the importance of understanding centroid calculations in structural analysis.
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hi, I've been tryign to work out the stress at a point for a T X-section area of a beam. However, the T-shape IS NOT symmetrical.
The general formula is Ixy = Ixy g + AXY (X = X bar and Y = Y bar)
I have X bar and Y bar and Area of course too.
i Dont know how to calculate the first term of this equation which is the Ixy g bit.
Could someone please help. this is driving me nuts. :cry:
 
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What does "g" represent? I assume Ixy g meant the centrifugal moment of area through the centroid axis? I don't know why it wouldn't work. Apply Steiner's rule (the one you wrote down) a few times, and you should be able to calculate it.
 

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