C2. Materials in domestic and industrial applications GapFill

To observe the behaviour of a material under varying stress and strain it is necessary to shape the material into a  circlesheetwireplate or any shape that you can gradually add forces to. For   an inelastica brittlean elastica ductile material, the stress–strain curve is made up of three main regions:

1. At small stresses, the first region of the graph is   quadraticlinearquarticcubic and from this we can calculate the   elastic limitYoung's modulusplastic deformationstrength of the material. This is done by calculating the gradient of the graph.
2. When a large enough strain has been applied, the material reaches its  plastic deformation pointelastic limitfatigue pointyield point. The next region of the graph shows   plasticmalleableelasticbrittle behaviour as the strain no longer increases significantly as the stress increases.
3. At a significantly high stress the material begins  neckingfatiguingsnappingbreaking. If you continue to add more forces to the material it will eventually fracture, which is   brittlemalleableelasticplastic behaviour.