1. Father of Indian
dentistry -----R AHMED
PHYSICAL
PROPERTIES
2. Stress ----the internal
force resisting the appiied external load in a unit area is called stress.
3. Dependin upon direction
and magnitude stress may be:
Compressive----it
is the internal resistance to load placed on a body, which tends to compress/
shorten it.
Tensile--- any
resistance to deformation of a body by load that tends to stretch/elongate it.
Shear---
stress that tends to resist twisting motion or a sliding of one portion of a
body over another.
Impact----
it is the stress that is induced by one/both bodies in motion when they meet.
