317 Shear Stresses In Beams

In addition to normal stresses (Art. 3.16), beams are subjected to shearing. Shear stresses vary over the cross section of a beam. At every point in the section, there are both a vertical and a horizontal shear stress, equal in magnitude [Eq. (3.37)].

TABLE 3.2 Properties of Sections

Area ~bh c = depth to centroid h

I = moment of inertia about centroidal axis bh3

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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