wat r stress n young's modulus ??

Asked by Archana Sharma | 27th Jun, 2010, 12:00: AM

Expert Answer:

Stress is defined as "force per unit area".

Stress = Force/Area

σ = Fn / A      

where

σ = normal stress ((Pa) N/m2, psi)

Fn = normal component force (N, lbf)

A = area (m2, in2)

Young's modulus is the ratio of stress, which has units of pressure, to strain, which is dimensionless; therefore Young's modulus itself has units of pressure.

The SI unit of modulus of elasticity (E, or less commonly Y) is the pascal (Pa or N/m²); the practical units are megapascals (MPa or N/mm²) or gigapascals (GPa or kN/mm²).

Answered by  | 15th Jul, 2010, 02:55: PM

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