Deformation of solids

What does compressive mean

a force that squeezes and shortens an object

what does tensile mean

tension or pulling

what does extension mean

the increase in the length of a material from its original length

what is hooke’s law

provided the elastic limit is not exceededm the extension fo an object is proportional to the applied force

what is elastic deformation

an object that returns to its initial length when the force is removed has deformed elastically

what is plastic deformation

an object that does not return to its inital length when the force is removed is deformed permanently

what is limit of proportionality

the point beyond which extension is no longer proportional to the force

what is elastic limit

the value of stress beyond which an object will not return to its original dimensions

what is strain

extension per unit length

what is stress

force per unit cross-sectional area that acts at right angles

what is young modulus

the stress in the material divided by the strain

what is elastic potential energy

energy stored in a body due to a change in its shape