ME 212 Lecture Notes - Lecture 1: Shear Modulus, Modulus Guitars, Bulk Modulus
Document Summary
An element subject to shear does not change in length but undergoes a change in shape. The change in angle at the corner of an original rectangular element is called the shear strain and is expressed as. The ratio of the shear stress (cid:306) and the shear strain (cid:534) is called the modulus of elasticity in shear or modulus of rigidity and is denoted as g, in mpa. The relationship between the shearing deformation and the applied shearing force is where v is the shearing force acting over an area as. When a bar is subjected to a tensile loading there is an increase in length of the bar in the direction of the applied load, but there is also a decrease in a lateral dimension perpendicular to the load. The ratio of the sidewise deformation (or strain) to the longitudinal deformation (or strain) is called the poisson"s ratio and is denoted by (cid:542).
