Engineering Science 1022A/B/Y Lecture Notes - Lecture 2: Rigid Body, Fluid Mechanics, Statics
Mechanics what happens to a body when forces are applied. Bodies at rest or in motion: rigid body. Statics equilibrium of bodies that are at rest or moving with constant velocity. Types of loads: dead and live: self-weight (static), vehicles (static load, individual vehicle no impact), people, wind (live), waves, seismic activity (live, deformable body mechanics, fluid mechanics. Idealization break down into something so you can solve through mechanics. Particle body of negligible dimension: can be analyzed as a point mass, geometry is not considered, force applied/pass through the center. Rigid body stiff body with negligible deformations: parts of body remain fixed relative to each other, changes in geometry are small, material properties not considered in analysis of applied forces, forces can be applied anywhere, ex. Concentrated forces represents effect of loading assumed to act on a point on a body: reasonable is area over which load is applied is small compared to overall size of body, ex.