The slope of the line in a stress-strain diagram in the elastic region. Before the yield stress.

Also called the modulus of elasticity or elastic modulus.

If a wire is stretched, then so long as it is not stretched too far, it will behave a bit like a spring. (See: Hooke's Law)

The Young's Modulus of a material is the stress divided by the strain

Stress = Force over area
Strain = Extension over original length

NB: Stress causes strain.

(Y) or the modulus of elasticity, is defined as

Modulus of elasticity = stress / strain

The modulus has the same units as stress. A large modulus means that a large stress is requird to produce a given strain - the object is rigid

Accordingly, Y = ( F/A ) / ( Δ/L0 ) = FL0 / AΔL

Its SI unit is Pa. Unlike the constant k in Hooke's Law, the value Y depends only on the material of the wire or rod], and not on its dimensions or configuration. Consequenty, Young's modulus is an important basic measure of the mechanical behavior of materials.

Log in or register to write something here or to contact authors.