Stress And Strain Flashcards
What are tensile forces
Forces that stretch an object
What are comprehensive forces
Forces that squash an object
What is the equation for stress and strain
Force/area
extension/original length
What is ultimate tensile stress
The maximum tensile stress an object can withstand
What is ductility
When an object can be stretched out inti a wire and remain that way
Why are ductile materials able to deform as they approach fracture point
Because they increase on strain as stress decreases
What is yield point on a stress strain curve
When a material extends without any increasedstress
What is the fracture point
Material breaks
Describe a stress strain curve for brittle material
Yield and fracture point are the same
Material fractures before large extension
What happens to a piece of metal before practire
It undergoes plastic deformation
what is the limit ofnthe proportionality
the point at which stress is no longer proportional to strain
