ABSTRACT
This chapter focuses on deflection, the analysis of which is as important as that of stress. Moreover, deflections must be considered in the design of statically indeterminate systems, although it is interested only in the forces or stresses. Beam deflections due to bending are determined from deformations taking place along a span. Analysis of the deflection of beams is based on the assumptions of the beam theory. The chapter considers a semigraphical technique called the moment-area method for determining deflections of beams. Determination of beam deflections by moment-area theorems is fairly routine. They are equally applicable for rigid frames. A moving body striking a structure delivers a suddenly applied dynamic force that is called an impact or shock load. The chapter determines the stress and deflection caused by linear or longitudinal and bending impact loads. In machinery, torsional impact occurs in the rotating shafts of punches and shears; geared drives; clutches, brakes, and torsional suspension bars; and numerous other components.
