Fundamentals

Springs and dampers

Materials that exhibit viscous and elastic deformation, depending on the strain and strain rate

Degradation of microscopic stiffness and strength
1. Formation of microcracks
2. Cold Growth
3. Particle debonding

Deformation energy stored as potential energy

Measure of degree of plastic deformation a material has sustained

Materials resistance to localized deformation
Brinnell: Ball
Vickers: Dimond
Rockwell: Cone

Max engineering strength a material can withstand before failure

Part of the deformation energy that results in permanent deformation, and can not be recovered