# modulus of elasticity

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## mo·du·lus of e·las·tic·i·ty

a coefficient expressing the ratio between stress per unit area acting to deform a body and the amount of deformation that results from it.
Farlex Partner Medical Dictionary © Farlex 2012

## modulus of elasticity

The ratio of a force applied to a material to the increment of change (e.g. increase in length; angular deformation) in that material. Materials with low modulus of elasticity are less resistant to stress, while materials with high modulus of elasticity resist stress and hold their shape better. The SI unit of modulus of elasticity E is the pascal (Pa). Examples: the modulus of elasticity of a PMMA contact lens is about 3000 MPa, it is around 0.4 to 1.5 MPa for silicone hydrogel lenses and 0.3 to 0.5 MPa for hydrogel lenses. Syn. coefficient of elasticity; Young's modulus of elasticity.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
For the second factor--sales promotion--the marginal efficiency [B.sub.2] = 1.196 and the coefficient of elasticity [E.sub.2] = 0.311 have significant values, meaning that the change in expenses for sales promotion will increase the firm's profit considerably.
For the third factor--direct sales--both [B.sub.3] and [E.sub.3] are positive, and the coefficient of elasticity has the lowest value of 0.239.
where [gamma] is the coefficient of elasticity of adjustment and its value is expected to lie between zero and unity.
where [theta] is the coefficient of elasticity of adjustment, and its value is expected to lie between zero and unity, and U3 is the disturbance term.
1 we have sprung mass [m.sub.s], unsprung mass [m.sub.u], coefficient of elasticity for the suspension spring [k.sub.s], coefficient of elasticity for the wheel [k.sub.u], damping coefficient for the damper [b.sub.s], coefficient as a time function for the magneto-rheological damper of the semiactive suspension [b.sub.s](t), damping coefficient of wheel [b.sub.u], disturbance created by the road acting upon the suspension w.

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