Materials Flashcards
(15 cards)
What does Hooke’s Law state?
The forces needed to extend a spring is directly proportional to the extension of the spring UNTIL the limit of proportionality is reached (elastic limit)
What is the elastic limit of a material?
The furthest point the object can be stretched or deformed whilst being able to return to its previous shape.
What happens if an object exceeds its elastic limit?
The object becomes unable to return to its original shape or length when the force is removed from it.
What are tensile forces?
Forces that produce extension
What are compressive forces?
Forces that shorten/squish and object.
What is the gradient on a force/extension graph?
Spring Constant.
What is the equation linking force to extension?
Force Applied(N) = Stiffness Constant (N/m) x Extension(m)
F=Kx
How do you find the extension of an object?
Length - Original Length
What is an elastic material?
A material that can return to its original shape after being loaded.
What is a plastic material?
A material that retains its shape when deformed
What is the process called when an object is stretched or compressed?
Deformation
What is the area under a Force/Extension graph
Elastic Strain Energy/ Elastic potential energy
How would you calculate the total spring constant of two spring in a series with each other?
1/K1+1/K2=1/K3
How would you find the total spring constant of springs in parallel with each other?
K1+K2=K3
