The vast majority of metal materials subjected to a
relatively low tensile stress has a proportionality between the
applied voltage and the observed deformation, according to the ratio:
Elastic Modulus Formula
Explaining graphically:
Source:
USP
What is Elastic Modulus?
It is a (quotient) relationship between the applied voltage and the
resulting elastic deformation.
This module is related to the stiffness of the material or the
resistance to elastic deformation, about which I will talk below.
Origin
This proportionality ratio was deducted from the
(F=k.x).
The constant E is called elastic modulus (but also
is known as elastic modulus).
It indicates the stiffness of the material (resistance of the material to the
elastic deformation) and depends on the forces and interatomic bonds.
In the International System (Is), the values of E are expressed
gigapascal (GPa), as they have very high values.
Examples and Values
For most metals, the elastic modulus varies
between 45 GPa (magnesium) and 407 GPa (tungsten).
The values of elasticity modules for materials
ceramics are too high.
For polymeric materials, the values of the
elasticity are much lower than metallic ones, ranging from 0.007 to 4 GPa.
Below is a table with some examples of materials (temperature
environment):
The elastic modulus difference from metals, ceramics
and polymers is due to the different types of atomic bonds existing in these
three classes of materials.
In addition, the temperature increase tends to decrease the elastic modulus for almost all
the materials.
Influence of Temperature
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As can be seen, elastic modulus tends to decrease with increasing temperature.
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