doc:user:elements:contact:laws
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doc:user:elements:contact:laws [2014/03/11 15:47] – [TmFrictionlessContactMaterial] wautelet | doc:user:elements:contact:laws [2025/04/29 15:37] (current) – papeleux | ||
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- | ====== | + | ====== |
+ | ===== Description ===== | ||
+ | For all contact materials, a penalty along the normal direction and a depth at which contact is detected are required. Contact can be: | ||
+ | * positively unilateral | ||
+ | * negatively unilateral ('' | ||
+ | * bilateral ('' | ||
- | ===== Description ===== | ||
- | |||
- | Pour tous les matériaux de contact, une pénalité normale et une profondeur de contact doivent être entrées. Le contact peut être de trois types : | ||
- | * unilatéral positif ('' | ||
- | * unilatéral négatif ('' | ||
- | * bilatéral ('' | ||
+ | __Choice of depth at which contact is detected:__ If the contact matrix is made of circles, the depth must be smaller than the smallest radius. If it is planar, the depth is arbitrary, but a large depth leads to a slow contact detection, when if the depth is too small some contacts can be missed. | ||
- | __Choix de la profondeur de détection du contact:__ Si la géométrie de la matrice de contact est décrite avec des cercles, cette valeur doit être inférieure au rayon du plus petit cercle. Si il s’agit d’un outil plat, la profondeur peut être aussi grande qu on veut (garder en tête que plus ce paramètre est grand, plus la détection du contact est lente; plus il est petit, plus on risque de manquer certains contacts). | ||
===== FrictionlessContactMaterial ===== | ===== FrictionlessContactMaterial ===== | ||
=== Description === | === Description === | ||
- | Loi de contact sans frottement. | + | Contact without friction. |
- | === Paramètres | + | === Parameters |
- | + | ^ Name | |
- | ^ | + | | Penalty along normal direction |
- | | Pénalité normale | + | | Depth at which contact |
- | | Profondeur de détection du contact | + | | Type of contact |
- | | Type de contact | + | |
===== FrictionlessVariablePenaltyContactMaterial ===== | ===== FrictionlessVariablePenaltyContactMaterial ===== | ||
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=== Description === | === Description === | ||
- | Loi de contact sans frottement où la pénalité peut dépendre du gap. | + | Contact without friction where penalty can depend on the gap. |
- | === Paramètres | + | === Parameters |
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | :!: No '' | ||
- | ^ Nom | + | An evolution function must be associated to '' |
- | | Pénalité normale | + | |
- | :!: PAS de dépendance en '' | + | |
- | + | ||
- | Une fonction d' | + | |
===== StickingContactMaterial ===== | ===== StickingContactMaterial ===== | ||
=== Description === | === Description === | ||
- | Loi de contact | + | Sticking |
- | === Paramètres | + | === Parameters |
- | + | ^ Name | |
- | ^ | + | | Penalty along normal direction |
- | | Pénalité normale | + | | Penalty along tangential direction |
- | | Pénalité tangente | + | | Depth at which contact |
- | | Profondeur de détection du contact | + | | Type of contact |
- | | Type de contact | + | |
===== StickingVariablePenaltyContactMaterial ===== | ===== StickingVariablePenaltyContactMaterial ===== | ||
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=== Description === | === Description === | ||
- | Loi de contact | + | Sticking |
- | === Paramètres | + | === Parameters |
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | :!: No '' | ||
- | ^ Nom | + | An evolution function must be associated to '' |
- | | Pénalité normale | + | |
- | | Pénalité tangente | + | |
- | :!: PAS de dépendance en '' | + | |
- | Une fonction d' | + | ===== AdhesiveStickingContactMaterial |
- | ===== CoulombContactMaterial | + | |
=== Description === | === Description === | ||
- | Loi de contact | + | 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 |
+ | Up to now, forces are computed forces are computed as classical sticking depending to Normal and Tangential Penalty. | ||
- | === Paramètres | + | === Parameters |
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact is detected | ||
+ | | Initial Type of contact | ||
- | ^ | + | ===== CoulombContactMaterial ===== |
- | | Pénalité normale | + | |
- | | Pénalité tangente | + | === Description === |
- | | Profondeur de détection du contact | + | |
- | | Coefficient | + | Coulomb' |
- | | Coefficient | + | |
- | | Type de contact | + | === Parameters === |
+ | ^ Name | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact | ||
+ | | Coefficient | ||
+ | | Coefficient | ||
+ | | Type of contact | ||
===== TrescaContactMaterial ===== | ===== TrescaContactMaterial ===== | ||
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=== Description === | === Description === | ||
- | Loi de contact avec frottement de Tresca. | + | Tresca's friction law. Friction do not depend on pressure. It is computed using penalty method with sticking |
- | :!: Pour avoir un sens, cette loi nécessite l' | + | :!: This law requires the use of '' |
- | === Paramètres | + | === Parameters |
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact is detected | ||
+ | | Static frictional shear factor | '' | ||
+ | | Dynamic frictional shear factor | '' | ||
+ | | Initial shear yield stress | ||
+ | | Type of contact | ||
- | ^ Nom | + | The threshold is usually computed using mσ0/√3 |
- | | Pénalité normale | + | |
- | | Pénalité tangente | + | |
- | | Profondeur de détection du contact | + | |
- | | Seuil de frottement statique (exprimé en terme de cisaillement) | + | |
- | | Seuil de frottement dynamique (exprimé en terme de cisaillement) | + | |
- | | Type de contact | + | |
- | + | ||
- | Le seuil est généralement calculé par mσ0/√3 | + | |
===== TmFrictionlessContactMaterial ===== | ===== TmFrictionlessContactMaterial ===== | ||
- | Loi de contact | + | Thermomechanical |
- | Le flux de chaleur | + | The heat flux qN |
- | $$q_{N} = h_c \left(p_{N} \right) \left(T^{S} - T^{M}\left(\mathbf{\xi}^{S}\right)\right) $$ | + | $$q_{N} = h_c \left(p_{N} \right) \left(T^{S} - T^{M}\left(\bf{\xi}^{S}\right)\right), $$ |
+ | where | ||
+ | * pN is the contact pressure, | ||
+ | * TS is the temperature of the slave node, | ||
+ | * TM(ξS) is the temperature of a point on the master surface corresponding to the closest projection of the slave node on the master surface, | ||
+ | * hc is the thermal resistance under conduction. | ||
+ | |||
+ | This thermal resistance under conduction hc is modeled as | ||
+ | hc(pN)=hc0(pNHv)w, | ||
- | === Paramètres === | + | where |
+ | * Hv Vickers' | ||
+ | * w is an exponent, | ||
+ | * hc0 is the nominal thermal resistance under conduction. | ||
- | ^ | + | === Parameters === |
- | | Pénalité normale | + | ^ Name ^ |
- | | Profondeur de détection du contact | + | | Penalty along normal direction |
- | | Coefficient d' | + | | Depth at which contact |
- | | Exposant de la loi d' | + | | Nominal thermal resistance |
- | | Dureté du matériau | + | | Exponent |
- | | Type de contact | + | | Material hardness |
+ | | Type of contact | ||
- | :!: Cette loi n'est pas testée en 3D :!: | + | :!: Not tested in 3D :!: |
===== TmStickingContactMaterial ===== | ===== TmStickingContactMaterial ===== | ||
- | Loi de contact | + | Sticking thermomechanical |
- | === Paramètres | + | === Parameters |
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact is detected | ||
+ | | Nominal thermal resistance | ||
+ | | Exponent | ||
+ | | Material hardness | ||
+ | | Type of contact | ||
- | ^ Nom | + | :!: Not tested in 3D :!: |
- | | Pénalité normale | + | |
- | | Pénalité tangente | + | |
- | | Profondeur de détection du contact | + | |
- | | Coefficient d' | + | |
- | | Exposant de la loi d' | + | |
- | | Dureté du matériau | + | |
- | | Type de contact | + | |
- | + | ||
- | :!: Cette loi n'est pas testée en 3D :!: | + | |
===== TmCoulombContactMaterial ===== | ===== TmCoulombContactMaterial ===== | ||
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=== Description === | === Description === | ||
- | Loi de contact | + | Thermomechanical |
+ | |||
+ | === Parameters === | ||
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact is detected | ||
+ | | Coefficient of static friction | ||
+ | | Coefficient of dynamic friction | ||
+ | | Nominal thermal resistance | ||
+ | | Exponent | ||
+ | | Material hardness | ||
+ | | Type of contact | ||
+ | |||
+ | :!: Not tested in 3D :!: | ||
+ | |||
+ | ===== TmTrescaContactMaterial ===== | ||
+ | |||
+ | === Description === | ||
+ | |||
+ | Thermomechanical contact using Tresca' | ||
+ | |||
+ | === Parameters === | ||
+ | ^ | ||
+ | | Penalty along normal direction | ||
+ | | Penalty along tangential direction | ||
+ | | Depth at which contact is detected | ||
+ | | Static frictional shear factor | '' | ||
+ | | Dynamic frictional shear factor | '' | ||
+ | | Initial shear yield stress | ||
+ | | Nominal thermal resistance | ||
+ | | Exponent | ||
+ | | Material hardness | ||
+ | | Type of contact | ||
- | === Paramètres === | + | The threshold is usually computed using mσ0/√3 where //m// is Tresca' |
- | ^ Nom | + | :!: Not tested in 3D :!: |
- | | Pénalité normale | + | |
- | | Pénalité tangente | + | |
- | | Profondeur de détection du contact | + | |
- | | Coefficient de frottement statique | + | |
- | | Coefficient de frottement dynamique | + | |
- | | Coefficient d' | + | |
- | | Exposant de la loi d' | + | |
- | | Dureté du matériau | + | |
- | | Type de contact | + | |
- | :!: Cette loi n'est pas testée en 3D :!: |
doc/user/elements/contact/laws.1394549275.txt.gz · Last modified: 2016/03/30 15:22 (external edit)