1. Reference problem#
1.1. Geometry#
It is a composite material made up of 16 superimposed layers of the same material and different fiber directions forming a \(4.48m\) thick plate. The longitudinal direction or direction of the fibers of each layer is defined by the first direction of orthotropy.
1.2. Material property#
The properties of the material are:
Longitudinal Young’s modulus: \(\text{E\_L}=59000\mathrm{MPa}\)
transversal Young’s module: \(\text{E\_T}=59000\mathrm{MPa}\)
shear modulus in plane \(\text{LT}\): \(\text{G\_LT}=3700\mathrm{MPa}\)
Poisson’s ratio in plane \(\text{LT}\): \(\text{NU\_LT}=0.08\)
criterion for failure under traction in the longitudinal direction: \(\mathrm{XT}=560\mathrm{MPa}\)
criterion for failure under compression in the longitudinal direction: \(\mathrm{XC}=-475\mathrm{MPa}\)
Traction failure criterion in the transverse direction: \(\mathrm{YT}=560\mathrm{MPa}\)
compression failure criterion in the transverse direction: \(\mathrm{YC}=-475\mathrm{MPa}\)
shear failure criterion in plane \(\text{LT}\): \(\text{S\_LT}=48\mathrm{MPa}\)
The orientation of the first layer is 0° with respect to the reference frame, for the second layer 45°, for the third 0° and so on.
1.3. Boundary conditions and loads#
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