12. J modeling#
Validation of the joint \(\mathrm{2D}\) \(\text{HYME}\) with the law JOINT_MECA_FROT
12.1. Characteristics of modeling#
Modeling in plane deformations D_ PLAN for the elastic element.
Plane modeling for the joint element (keyword PLAN_JOINT_HYME).
12.2. Characteristics of the mesh#
Number of knots: 13 (including 3 knots with degrees of pressure freedom)
The elastic element is a QUAD8.
The joint element is a degenerate QUAD8 (knots combined).
12.3. Tested sizes and results#
To test the hydraulic part, we impose a pressure \({p}_{\mathit{fluide}}\mathrm{=}500\mathit{Pa}\) on the node \(\mathrm{NS5}\) and we test the same value on the node \(\mathrm{NS7}\).
Fashion \(I\)
The joint is opened up to its tensile strength threshold [6] _ . \(U\mathrm{=}{U}_{\mathit{el}}\) Then we take advantage to get to \(U\mathrm{=}2{U}_{\mathit{el}}\). It passes into compression zone \(U\mathrm{=}\mathrm{-}{U}_{\mathit{el}}\mathrm{/}3\). Finally, the joint is recharged up to its equilibrium point \(U\mathrm{=}0\). We test the global response (the resultant of the nodal force, FN) of the system (joint and cube) in the local coordinate system. The reference values are obtained analytically taking into account the fluid pressure, which causes the normal curve to shift downwards (see page 6).
Fashion \(\mathit{II}\)
The joint is solicity in sliding mode \(\mathit{II}\). We then test the value of the \(c\) membership. Then we change the normal aperture to \(I\) mode and we slide back and forth in \(\mathit{II}\) mode for \({U}_{t}\mathrm{=}\mathrm{\pm }{U}_{\mathit{el}}\mathrm{/}3\). The reference values are obtained analytically taking into account the fluid pressure, which does not influence the tangential curve (see page 6).