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Table of Contents
Contact elements
Contact[2|3]DElement
For rigid-defo contact: Contact[2|3]DElement
defines contact between a rigid entity under a given displacement (unmeshed geometric entity) and a meshed geometric entity which is part of the surface of the mesh. This element is therefore a one node element, called the slave, having 2/3 dofs in 2/3D.
For defo-defo contact: Contact[2|3]DElement
defines contact between two meshed geometric entities, both part of the surface of the mesh. This element associates one node to a set of edges or faces.
Parameters
Name | Metafor Code | Dependency |
---|---|---|
MATERIAL | Number of the contact material to consider | - |
STIFFMETHOD | Method used to compute the stiffness matrix = STIFF_ANALYTIC : analytic matrix (default)= STIFF_NUMERIC : numerical matrix | - |
AREAINCONTACT | Parameter to take into account the surface associated to a slave node to ponder contact forces = AIC_NO , False, 0 : Traditional penalty : Force = Penalty * gap (by default but not recommended)= AIC_ONCE , True, 1 : Pondered penalty : Force = Penalty * gap * “Slave node surface computed based on initial configuration” ( recommended in most cases)= AIC_ONCEPERSTEP : Pondered penalty : Force = Penalty * gap * “Slave node surface computed at the beginning of each time step, so based on previous configuration at equilibrium (to use if friction depends on the contact area, for example using Tresca's law) = AIC : Pondered penalty : Force = Penalty * gap * “Node contact surface computed for each mechanical iteration” | - |
AREAINCONTACTMETHOD | Method used to compute the slave node surface used to ponder contact forces = AICM_GEOPHYS , 0 : the calculation of the area is based on a geometrical approach in the physical space (by default).= AICM_GEOREF , 1 : the calculation of the area is based on a geometrical approach in the reference space.= AICM_CONS , 2 : the calculation of the area is based on an energy approach. | - |
PRECONNORMALGAP | Accuracy set on the normal gap when using the augmented Lagrangian. By default, no value since the method is deactivated. | - |
PRECONTANGENTGAP | Accuracy set on the tangential gap when using the augmented Lagrangian. By default, no value since the method is deactivated. | - |
Tm[2]Contact[2|3]DElement
Thermomechanical contact element for rigid-defo or defo-defo, of the first or second order. Same as ContactElement
but with a thermal field.
:!:Second order thermomechanical elements are not tested:!:
Parameters
Name | Metafor Code | Dependency | |
---|---|---|---|
MATERIAL | Number of the contact material to consider | - | |
STIFFMETHOD | Method used to compute the stiffness matrix = STIFF_ANALYTIC : analytic matrix (default)\\= STIFF_NUMERIC : numerical matrix | - | |
AREAINCONTACT | Parameter to taken into account the surface associated to a slave node to ponder contact forces = AIC_NO , False, 0 : Traditional penalty : Force = Penalty * gap (by default but not recommended)= AIC_ONCE , True, 1 : Pondered penalty : Force = Penalty * gap * “Slave node surface computed based on initial configuration” ( recommended in most cases) = AIC_ONCEPERSTEP : same as AIC_ONCE but the surface is recomputed at the beginning of each time step, not just once in the initial configuration (to use if friction depends on the contact area, for example using Tresca's law) | - | |
PRECONNORMALGAP | Accuracy set on the normal gap when using the augmented Lagrangian. By default, no value since the method is deactivated. | - | |
PRECONTANGENTGAP | Accuracy set on the tangential gap when using the augmented Lagrangian. By default, no value since the method is deactivated. | - | - |
TOOLTEMP | Temperature of the tool in a rigid-defo configuration ( By default, 293.0K ) | time |