4. B modeling#

4.1. Characteristics of modeling#

The models tested are DIS_T on SEG2 meshes. The stiffness characteristics of the discretes are therefore of the type: K_T_D_L, K_T_D_N, M_T_D_N.

4.2. Characteristics of the mesh#

Number of knots: 3, number of stitches: 2, elements SEG2: 1, elements POI1: 1.

4.3. Boundary conditions and loads#

Nodes N1, N2, N3 are stuck in the Y and Z directions.

Nodes N1 and N3 are subject to displacement \(U(t)\), speed \(V(t)\), and acceleration \(\gamma (t)\) in the X direction.

The condition while traveling as a function of time:

\(U(t)={U}_{0}.\mathrm{sin}(2\pi .\mathit{f.t})/(2\pi .f)\) with \(f=0.5\mathit{Hz}\) and \({U}_{0}=\mathrm{6.0mm}\)

The speed condition as a function of time: \(V(t)=\dot{U}(t)\)

The accelerating condition as a function of time: \(\gamma (t)=\ddot{U}(t)\)

4.4. Tested sizes and results#

The quantities are tested in non-regression (with the tolerances by default) and against the values obtained with modeling A, with an accuracy of \(1.0E-02\).

The sizes tested are:

  • the displacement of the N2 node,

  • the effort at the N2,

  • the power dissipated in the non-linear device,

  • the anelastic displacement of the non-linear device,

  • the cumulative anelastic displacement of the non-linear device.

The moments used to test the different quantities are those when the effort reaches an extreme.

_images/100000000000034A00000253C1A00ED1E200D11B.png

Figure 4.4-a : Comparison of force-displacement response at the node N2.

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Figure 4.4-b : Force vs time comparison at the node N2.

_images/100000000000034A00000253690D7977A626E668.png

Figure 4.4-c : Comparison of dissipation vs time.

_images/100000000000034A000002530B004840EB4FA8AB.png

Figure 4.4-d : Comparison of anelastic displacement vs time.

_images/100000000000034A000002533B80EA5991241FB3.png

Figure 4.4-e : Comparison of cumulative anelastic displacement vs time.