Difference between revisions of "Elastic modulus"

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[[Elasticity and viscosity#What is the meaning of elasticity?|Elastic modulus]] in  [[Viscosity, elasticity, and viscoelasticity]] from [[Main Page#Lectures for AP225|Lectures for AP225]].
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References:
  
 
[[Mechanical Properties of Xenopus Egg Cytoplasmic Extracts]]
 
[[Mechanical Properties of Xenopus Egg Cytoplasmic Extracts]]

Latest revision as of 15:44, 27 November 2011

The tendency of a material to deform when an external force is applied: <math> \frac{\lambda}{\epsilon} </math> , where <math>\lambda</math> and <math>\epsilon</math> are the stress and the strain, respectively. The elastic modulus is defined only over the elastic deformation region in which the strain which the material undergoes is fully reversible.

A modulus is further defined by the precise experimental conditions used to arrive at the stress-strain strain curve used in its computation. Some common moduli include Young's modulus (E), which involves tensile forces; shear modulus (G or <math>\mu</math>), which is defined under shear-inducing forces; and the bulk modulus (K), which is defined as the volumetric stress over volumetric strain, making it effectively a 3D Young's modulus. Note that these moduli are further defined by ISO standarads by the types of materials in question.


See also:

Elastic modulus in Viscosity, elasticity, and viscoelasticity from Lectures for AP225.

References:

Mechanical Properties of Xenopus Egg Cytoplasmic Extracts