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Uniaxial traction test
E (Elasticity modulus) or Y (Young modulus) is an experimental obtained constant of a material and is a measure of stiffness. For the traction test and for the bending test, a force is applied gradually to the specimen; force and displacement are registered.
It may be necessary to reduce the number of data, but keep errors low, before importing into the application.
For an Euler-Bernoulli beam in bending, for elastic domain, displacement f and load P are related by relations shown in table 1. Iz is the moment of inertia (second moment of area) of the beam cross section. For an homogeneous and isotropic material errors are considered small if l/h<10, or l/De<10 . In application SSR (l/h, or l/De) slender short ratio is 10 if no other value is introduced. A warning is done if this condition is not fulfilled. As shown, P/f is the slope of curve P(f). Elasticity modulus for bending test is computed:
using formula for every load and displacement and consider a mean value (E_1 in application),
using slope from the graph option (E_2).
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