We discussed flexural stress of beams in class. In lab, we used the equation for the deflection of simple rectangular beam subjected to a point load at the center of the beam. Reviewing that equation might help you with this puzzle.
We discussed flexural stress of beams in class. In lab, we used the equation for the deflection of simple rectangular beam subjected to a point load at the center of the beam. Reviewing that equation might help you with this puzzle.
The I-beam is a beam with a cross section that resembles a capital "I" (at least for a few fonts such as Arial and Times). The I-beam shown has equal dimensions in both directions. A rectangular beam with the same cross sectional area is shown for comparison.
The "I" shape provides for much greater flexural strength than a rectangular beam with the same cross sectional area. For a given length, this means the same volume and mass. Hence, for the same cost of materials, the I-beam is stronger than the rectangular beam.
Can you explain qualitatively why the I-beam is stronger than the rectangular beam? Be sure to discuss how stress and strain occur over the cross section of the beam.
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