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Trace: • Continuous isotropic damage • Geoffrey DELIEGE • Dominik BOEMER • Récupérer les sources Metafor sous Windows • General Points
doc:user:elements:contact:laws

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doc:user:elements:contact:laws [2014/10/06 15:11] – jorisdoc:user:elements:contact:laws [2025/04/29 15:37] (current) – papeleux
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 An evolution function must be associated to ''PEN_NORMALE'' and/or ''PEN_TANGENT'' (depending on generalized displacements GD). These function can be different. An evolution function must be associated to ''PEN_NORMALE'' and/or ''PEN_TANGENT'' (depending on generalized displacements GD). These function can be different.
 +
 +===== AdhesiveStickingContactMaterial =====
 +
 +=== Description ===
 +
 +Adhesive sticking contact is a sticking Contact material that is initialized with an unilateral type of contact (positive or negative) and that each slave node where contact is detected becomes bilateral (adhesive behavior).
 +Up to now, forces are computed forces are computed as classical sticking depending to Normal and Tangential Penalty.
 +
 +=== Parameters ===
 +^   Name                               ^     Metafor Code     ^  Dependency ^
 +| Penalty along normal direction       |   ''PEN_NORMALE''    |        ''TM''        |
 +| Penalty along tangential direction   |   ''PEN_TANGENT''    |        ''TM''        |
 +| Depth at which contact is detected   |    ''PROF_CONT''     |          -           |
 +| Initial Type of contact              |    ''TYPE_CONT''     |          -           |
  
 ===== CoulombContactMaterial ===== ===== CoulombContactMaterial =====
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 === Description === === Description ===
  
-Tresca's friction law. Friction do not depend on pressure. It is calculated using penalty method with sticking contact, and starts sliding once the tangential stress reaches a threshold entered by the user.+Tresca's friction law. Friction do not depend on pressure. It is computed using penalty method with sticking contact, and starts sliding once the tangential stress reaches a threshold entered by the user.
  
 :!: This law requires the use of ''AREAINCONTACT'' = ''AIC_ONCEPERSTEP'' :!: This law requires the use of ''AREAINCONTACT'' = ''AIC_ONCEPERSTEP''
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 | Penalty along tangential direction                 |   ''PEN_TANGENT''    |        ''TM''        | | Penalty along tangential direction                 |   ''PEN_TANGENT''    |        ''TM''        |
 | Depth at which contact is detected                 |    ''PROF_CONT''     |          -           | | Depth at which contact is detected                 |    ''PROF_CONT''     |          -           |
-| Threshold of static friction (in terms of shear)   |  ''COEF_FROT_STA''   |        ''TM''        | +| Static frictional shear factor |  ''TRESCA_STA_M''   |        ''TM''        | 
-| Threshold of dynamic friction (in terms of shear)  |  ''COEF_FROT_DYN''   |        ''TM''        |+| Dynamic frictional shear factor |  ''TRESCA_DYN_M''   |        ''TM''        | 
 +| Initial shear yield stress  |  ''TRESCA_K''   |        -        |
 | Type of contact                                    |    ''TYPE_CONT''     |          -           | | Type of contact                                    |    ''TYPE_CONT''     |          -           |
  
-The threshold is usually calculated using $m\,\sigma_0\,/\sqrt{3}$ where //m// is Tresca's coefficient of friction  and $\sigma_0$ is the tensile yield stress of the material.+The threshold is usually computed using $m\,\sigma_0\,/\sqrt{3}$ where //m// is Tresca's coefficient of friction  and $\sigma_0$ is the tensile yield stress of the material.
  
 ===== TmFrictionlessContactMaterial ===== ===== TmFrictionlessContactMaterial =====
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 | Penalty along tangential direction   |   ''PEN_TANGENT''    |        ''TM''        | | Penalty along tangential direction   |   ''PEN_TANGENT''    |        ''TM''        |
 | Depth at which contact is detected   |    ''PROF_CONT''     |          -           | | Depth at which contact is detected   |    ''PROF_CONT''     |          -           |
-| Coefficient of static friction       |  ''COEF_FROT_STA''   |        ''TM''        | +| Static frictional shear factor |  ''TRESCA_STA_M''   |        ''TM''        | 
-| Coefficient of dynamic friction      |  ''COEF_FROT_DYN''   |        ''TM''        |+| Dynamic frictional shear factor |  ''TRESCA_DYN_M''   |        ''TM''        | 
 +| Initial shear yield stress  |  ''TRESCA_K''   |        -        |
 | Nominal thermal resistance           |  ''CTM_H_NOMINAL''   |          -           | | Nominal thermal resistance           |  ''CTM_H_NOMINAL''   |          -           |
 | Exponent                             |  ''CTM_EXPONENT_E''  |          -           | | Exponent                             |  ''CTM_EXPONENT_E''  |          -           |
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 | Type of contact                      |    ''TYPE_CONT''     |          -           | | Type of contact                      |    ''TYPE_CONT''     |          -           |
  
-The threshold is usually calculated using $m\,\sigma_0\,/\sqrt{3}$ where //m// is Tresca's coefficient of friction  and $\sigma_0$ is the tensile yield stress of the material.+The threshold is usually computed using $m\,\sigma_0\,/\sqrt{3}$ where //m// is Tresca's coefficient of friction  and $\sigma_0$ is the tensile yield stress of the material.
  
 :!: Not tested in 3D :!: :!: Not tested in 3D :!:
  
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