EARTH260 Lecture Notes - Shear Modulus, Elastic Modulus, Bulk Modulus

• School: University of Waterloo
• Department: Earth Sciences
• Course: EARTH260
• Professor: Tony Endres

Document Summary

Mechanical energy can travel through a medium as a wave, such as sound waves in air or water. Seismic waves are waves of mechanical energy that travel through the earth"s interior. The traveltime and amplitude of these waves are measured to determine the structure of the subsurface. Stress a measure of the intensity of the mechanical force applied to a material. Consider the force applied uniformly across the face of a cube, the stress would be. Newtons / meter 2 ( n / m 2 ) = pascal (pa) There are different types of stress that can be applied to a material (e. g. , pressure, traction or shear stress). b. ) Strain a measure of the deformation (i. e. , changes in shape and size) caused by an applied stress. Different types of strain correspond to differing types of stress (e. g. , dilatational (or volumetric) strain, shear strain).