Bending and Shear in Solid Mechanics

This lecture covers the concepts of bending and shear in solid mechanics, focusing on the behavior of rigid bars under flexion. It explains how a bar, when subjected to its weight, forms an arc of a circle after bending. The lecture discusses the distribution of forces in the bar, the neutral surface, and the moment of inertia of the section. It also delves into the effects of different section shapes on the behavior of solids under bending and shear. The instructor illustrates these concepts with examples of rectangular and cylindrical sections, emphasizing the importance of understanding the section's geometry for predicting a solid's response to bending and shear.