## Youngs Modulus

Can somebody give me a short defination of youngs modulus?

I think its the way a material acts under pressure, is this correct?
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 Recognitions: Homework Help The Young Modulus is proportionality constant between the stress and relative longitudinal deformation. The Young Modulus physical interpretetion is the resistence a solid has against stretching. $$Y = \frac{\sigma}{\delta L}$$
 Recognitions: Gold Member Science Advisor Young's modulus for linear-elastic tension / compression, Hookean material in its simplest form (uniaxial deformation like a rod or something like) : $$E = \frac {\sigma L}{\delta}$$ where $$\sigma$$ is the applied uniaxial stress, $$\delta$$ the displacement and L the length (initial) of the rod or reference in question (so in this form it is essentially a 1D construct with infinitesimal deformations).

## Youngs Modulus

Ok thanks guys. Great help, :-)