C5 Mechanical properties Flashcards
4 type of mechanical properties
- strength
- hardness
- ductility
- stiffness
how mechanical properties use to understand material
two type
- deformation
- break
elobrate
deformation
3 types
- elongation
- compress
- twist
explain how
Metal response to external load
3 ways
- stress & strain
- elastic deformation
- plastic deformation
how
Stress & strain response to external load
4 ways
- tension
- compression
- shear
- torsion
explain
Elastic deformation
-deformation is recoverable
-temporary deformation disappears after removal of the applied forces
plastic deformation
-stays even after removal of the applied forces
-permanent deformation is irreversible
explain
stress
- force acting per unit area over which the force is applied
- unit Pa @ Psi
explain
Strain
- Change in dimension per unit lenght
- cm/cm
what it does
Tensile
causing elongation
what it does
compression
causing shortening
in stress (y-axis) vs strain (x-axis) graf, what does slope mean
slope = Young modulus / modulus elasticity
hooke’s law
used for elastic deform
- “When an object has a relatively small deformation, the size of the deformation is directly proportional to the deforming load or force.”
- Fₛ = kx
in graph, where is the elastic limit
at the end of straight line
in graph, where is the tensile strength
at the curve line, the highest point
in graph, where is the breaking point
at the end point of the curve line
