Hello,
I am having a problem with analyzing a beam constructed with millboard (a sheet of bristol-board type wood). The millboard is used to construct an "I-Beam" with multiple vertical "I"s. The cross-section is something like:
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The problem is that the Modulus of Elasticity/Young's Modulus is much higher in tension than in compression. I am not sure how this affects the determination of the Neutral Axis (the axis where there is no Normal Stress). If E were the same in tension and compression, the Neutral Axis would just be located along the centroid of the cross-section. Does anyone have any ideas of how this type of beam can be analyzed for Normal Stress?
Thanks, Nish
Systems Design Engineering, University of Waterloo