Reduction of Area

Area reduction is a phenomenon similar to elongation and is also known as necking.

What is necking?

It is a reduction of the cross section of the test specimen in the region where the fracture will occur.

The deformation is higher in this area due to the concentration of stresses.

What is the practical meaning of area reduction?

It is also a measure of the ductility of the material, that is, the greater the area reduction, the more dubious ("soft") the material will be.

Where does the strication occur?

The area reduction occurs after the maximum tensile strength is exceeded (Point M to point F).
Onde ocorre a estricção?

Area reduction calculation

Area reduction can be calculated for circular section bodies or rectangular section bodies, see figure below:
Cálculo da redução de área


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Materials: Reduction of Area
Reduction of Area
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