u3.13.14 Modelings x_ JOINT, x_, x_ ELDI, x_ INTERFACE and x_ INTERFACE_S#

Summary:

This document describes, for models PLAN_JOINT, AXIS_JOINT, 3D_ JOINT, PLAN_ELDI, 3D_,, AXIS_ELDI,, PLAN_INTERFACE, AXIS_INTERFACE, 3D_ INTERFACE, PLAN_INTERFACE_S, AXIS_INTERFACE_S, and 3D_, the following points: INTERFACE_S

  • the degrees of freedom carried by the finite elements that support modeling,

  • the related support meshes,

  • non-linear possibilities,

  • test cases implementing the models.

Type JOINT models (Phenomenon: mechanical) correspond to finite joint elements. They are based on a penalization formulation, and make it possible to model the opening of a crack. Their geometric supports are degenerate finite elements, whose nodes are combined two by two (QUAD4, HEXA8 and PENTA6). These finite elements can support behavior laws CZM_EXP_REG and CZM_LIN_REG (cohesive laws: doc [R7.02.11]). In addition, the elements PLAN_JOINT, AXIS_JOINT support the law of behavior JOINT_BA (steel to concrete link: doc [R7.01.21]).

The models PLAN_ELDI and AXIS_ELDI (Phenomenon: mechanical) correspond to elements with internal discontinuity. Their geometric supports are solid elements (QUAD4) crossed by a discontinuity. They also make it possible to model the opening of a crack. Such finite elements can support the law of behavior: CZM_EXP (cohesive law: see doc [R7.02.14]).

The models PLAN_INTERFACE, AXIS_INTERFACE, 3D_ INTERFACE, PLAN_INTERFACE_S, AXIS_INTERFACE_S and 3D_ INTERFACE_S (Phenomenon: mechanics) correspond to mixed interface finite elements, based on an augmented Lagrangian formulation. Their geometric supports are degenerate finite elements (QUAD8, HEXA20 and PENTA15). Such elements can support cohesive laws CZM_OUV_MIX, CZM_EXP_MIX,, CZM_TAC_MIX,,, CZM_FAT_MIX, CZM_TRA_MIX, and CZM_LAB_MIX (see doc [R7.02.11] and [R3.06.13]).

Afterwards, the characters” XXX “can be replaced by” PLAN “or” AXIS “.