SS

Question 1

Elasticity

Answer 1

the property of a material that enables it to deform when a force is applied to it and to return to its original size and shape when the force is removed.

Question 2

stress

Answer 2

is an internal resistance to an external force

Question 3

unit stress

Answer 3

the stress per unit of area of the section and is measured in pounds per square inch (PSI)

Question 4

strain

Answer 4

is the deformation, or change in size, of a body caused by external loads.
tensile loads - stretch
compressive loads - shorten

Question 5

unit strain

Answer 5

unit strain = the total strain ( ∆) / the original length (L)

Question 6

hooke’s law

Answer 6

states that up to a certain unit stress (elastic limit) unit stress (P/A) is directly proportional to unit strain (∆/L)

Question 7

resolving forces

Answer 7

replace one force with two or more other forces that will produce the same effect on a body as the original force

Question 8

charpy v-notch test

Answer 8

ductility test where a piece of material has a v-notch cut into the top
tests how much energy it takes to make the notch go through the whole piece
breaks quickly (little energy) - material is brittle
breaks slowly (lots of energy) - material is ductile