10. H modeling#
Validation of the joint \(\mathrm{3D}\) \(\text{HYME}\) HEXA20 with the law JOINT_MECA_RUPT
10.1. Characteristics of modeling#
3D modeling for the elastic element.
3D modeling_ JOINT_HYME for the joint element
10.2. Characteristics of the mesh#
Number of knots: 32 (including 8 knots with degrees of freedom of pressure)
The elastic element is a HEXA20.
The joint element is a degenerate HEXA20 (knots combined).
10.3. Tested sizes and results#
To test the hydraulic part, a pressure \({p}_{\mathit{fluide}}\mathrm{=}500\mathit{Pa}\) is imposed on the nodes \(\mathit{NS19}\) and \(\mathit{NS20}\) and the same value is tested on the nodes \(\mathit{NS17}\) and \(\mathit{NS18}\).
We test the mechanics in pure \(I\) mode. The joint is opened up to partial damage [4] _ . \(U\mathrm{=}\beta \mathrm{\times }{U}_{\mathit{el}}+(1\mathrm{-}\beta )\mathrm{\times }{U}_{\mathit{max}}\) where \(\beta \mathrm{=}0.2\). Then it goes into compression zone \(U\mathrm{=}\mathrm{-}{U}_{\mathit{el}}\). Finally, the joint is put into tension until complete damage \(U\mathrm{=}{U}_{\mathit{max}}\). 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 (see page 6).