Changes the velocity of a body
Force
The distribution of internal forces within a body
Stress
When a force acts perpendicular to a surface
Normal Stress
2 Types of Stress
Tensile and Compressive Stress
When a force acts parallel to a surface
Shear Stress
Relationship between stress and strain; describes how materials will deform
Young’s Modulus
Defines the state of stress at a point inside a material in its deformed state
Stress Tenor
Type of deformation mechanism and dilation.
Mean Stress (Isotropic Component)
Example of a Mean Stress
Lithostatic Pressure
Produces the distortion of a body.
Deviatoric Stress (Anisotropic Component)
Example of a Deviatoric Stress
Hydrostatic stress or pressure
Describes the normal and shear stress acting on planes of all possible orientations through a point in the rock
Mohr Circle
nonhydrostatic component; produces distortion
Deviatoric Stress
assumes the potential for distortion
Differential Stress
hydrostatic component; produces dilation
Mean Stress
