Please enable JavaScript.
Coggle requires JavaScript to display documents.
CHAPTER 5 - Coggle Diagram
CHAPTER 5
terms
strength - can support load
hardness = resist penetration
better wear
resist plastic
resist crack
ductility - change shape
stiffness - load to elastic deformation relations
toughness - resist impact
Deformation
elastic
stretch bonds
return to initial
temporary
stress and strain directly proportional
plastic
stretch bonds
still sheared after impact
permanent
stress and strain not proportional (curve)
irreversible
breaking atomic bonds
rearrangement of bonds
dislocations of motions
related to young modulus
ductility
%EL = Lfinal - Loriginal / L original x 100%
%RA= A original - A final / A original x 100%
toughness
energy to break
area under stress strain curve
Terms
fatigue - weaken the materials due to cyclic stress
creep - high operating temperature
time-dependent plastic