doc:user:elements:volumes:ortho_hypo_materials
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doc:user:elements:volumes:ortho_hypo_materials [2013/07/11 15:09] – joris | doc:user:elements:volumes:ortho_hypo_materials [2024/12/09 14:37] (current) – [TmElastOrthoHypoMaterial] vanhulle | ||
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+ | ====== Orthotropic materials ====== | ||
+ | ===== ElastOrthoHypoMaterial ===== | ||
+ | |||
+ | === Description === | ||
+ | |||
+ | Linear elastic orthotropic material. | ||
+ | |||
+ | The strain-stress relation in the orthotropic frame is written as: | ||
+ | |||
+ | |||
+ | $$ | ||
+ | \left[ | ||
+ | \begin{array}{c} | ||
+ | \varepsilon_{11} \\ | ||
+ | \varepsilon_{22} \\ | ||
+ | \varepsilon_{33} \\ | ||
+ | \varepsilon_{23} \\ | ||
+ | \varepsilon_{31} \\ | ||
+ | \varepsilon_{12} | ||
+ | \end{array} | ||
+ | \right] | ||
+ | = | ||
+ | \left[ | ||
+ | \begin{array}{cccccc} | ||
+ | \frac{1}{E_{1}} & -\frac{\nu_{12}}{E_{1}} & -\frac{\nu_{13}}{E_{1}} & 0 & 0 & 0 \\ | ||
+ | -\frac{\nu_{12}}{E_{1}} & \frac{1}{E_{2}} & -\frac{\nu_{23}}{E_{2}} & 0 & 0 & 0 \\ | ||
+ | -\frac{\nu_{13}}{E_{1}} & -\frac{\nu_{23}}{E_{2}} & \frac{1}{E_{3}} & 0 & 0 & 0 \\ | ||
+ | 0 & 0 & 0 & \frac{1}{2\, | ||
+ | 0 & 0 & 0 & 0 & \frac{1}{2\, | ||
+ | 0 & 0 & 0 & 0 & 0 & \frac{1}{2\, | ||
+ | \end{array} | ||
+ | \right] | ||
+ | \left[ | ||
+ | \begin{array}{c} | ||
+ | \sigma_{11} \\ | ||
+ | \sigma_{22} \\ | ||
+ | \sigma_{33} \\ | ||
+ | \sigma_{23} \\ | ||
+ | \sigma_{31} \\ | ||
+ | \sigma_{12} | ||
+ | \end{array} | ||
+ | \right] | ||
+ | $$ | ||
+ | |||
+ | === Parameters === | ||
+ | |||
+ | ^ | ||
+ | | Density | ||
+ | | Young Modulus E1 | '' | ||
+ | | Young Modulus E2 | '' | ||
+ | | Young Modulus E3 | '' | ||
+ | | Poisson ratio ν12 | ||
+ | | Poisson ratio ν13 | ||
+ | | Poisson ratio ν23 | ||
+ | | Shear modulus G12 | ||
+ | | Shear modulus G13 | ||
+ | | Shear modulus G23 | ||
+ | | Objectivity method | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | |||
+ | Only the first two orthotropic axes are computed using '' | ||
+ | |||
+ | ===== TmElastOrthoHypoMaterial ===== | ||
+ | :!: Metafor version >=3536 | ||
+ | === Description === | ||
+ | Linear thermoelastic orthotropic material with orthotropic thermal conduction law. | ||
+ | |||
+ | Thermal conduction writes in the orthotropic frame | ||
+ | $$ | ||
+ | \boldsymbol{K}~\nabla T = \left[ | ||
+ | \begin{array}{c c c} | ||
+ | K_1 & 0 & 0 \\ | ||
+ | 0 & K_2 & 0 \\ | ||
+ | 0 & 0 & K_3 | ||
+ | \end{array} | ||
+ | \right] \nabla T, | ||
+ | $$ | ||
+ | where \boldsymbol{K} is the orthotropic conduction matrix (in material axes) and \nabla T is the temperature gradient. | ||
+ | |||
+ | Linear thermoelasticity in the orthotropic frame writes | ||
+ | $$ | ||
+ | \boldsymbol{\sigma} = \boldsymbol{\sigma}_0 + \mathbb{H} : (\boldsymbol{\varepsilon} - \boldsymbol{\varepsilon}^{th}) = \boldsymbol{\sigma}_0 + \mathbb{H} : (\boldsymbol{\varepsilon} - \boldsymbol{\alpha} \Delta T), | ||
+ | $$ | ||
+ | with stress tensor \boldsymbol{\sigma}, | ||
+ | |||
+ | Thermoelastic dissipation term \dot{W}^{te} is given by the general (anisotropic) relation | ||
+ | $$ | ||
+ | \dot{W}^{te} = -\eta_{te} \left(\sum_{i=1}^3 \sum_{j=1}^3 \mathbb{H}_{ijkl} \alpha_{kl} \right)T \frac{\dot{J}}{J}, | ||
+ | $$ | ||
+ | with fraction of heat dissipated thermoelastic energy \eta_{te} and determinant of the Jacobian matrix J. | ||
+ | |||
+ | === Parameters === | ||
+ | ^ | ||
+ | | Density | ||
+ | | Young Modulus E_1 | '' | ||
+ | | Young Modulus E_2 | '' | ||
+ | | Young Modulus E_3 | '' | ||
+ | | Poisson ratio \nu_{12} | ||
+ | | Poisson ratio \nu_{13} | ||
+ | | Poisson ratio \nu_{23} | ||
+ | | Shear modulus G_{12} | ||
+ | | Shear modulus G_{13} | ||
+ | | Shear modulus G_{23} | ||
+ | | Objectivity method | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Thermal Expansion \alpha_1 | ||
+ | | Thermal Expansion \alpha_2 | ||
+ | | Thermal Expansion \alpha_3 | ||
+ | | Conductivity K_1 | '' | ||
+ | | Conductivity K_2 | '' | ||
+ | | Conductivity K_3 | '' | ||
+ | | Heat Capacity C_p | '' | ||
+ | | Dissipated thermoelastic power fraction \eta_e | ||
+ | | Dissipated (visco)plastic power fraction (Taylor-Quinney factor) | ||
+ | |||
+ | ===== EpIsoHOrthoHypoMaterial ===== | ||
+ | |||
+ | === Description === | ||
+ | |||
+ | Elastoplastic orthotropic material with isotropic hardening. | ||
+ | |||
+ | The elastic part follows the same relation as the [[# | ||
+ | |||
+ | As in the isotropic case, the yield stress verifies the constraint: | ||
+ | |||
+ | $$ | ||
+ | f=\overline{\sigma}-\sigma_{yield}=0 | ||
+ | $$ | ||
+ | |||
+ | where \overline{\sigma} is an equivalent stress, specific to orthotropic materials. See for example the [[doc: | ||
+ | |||
+ | === Parameters === | ||
+ | |||
+ | ^ | ||
+ | | Density | ||
+ | | Young Modulus E_1 | '' | ||
+ | | Young Modulus E_2 | '' | ||
+ | | Young Modulus E_3 | '' | ||
+ | | Poisson ratio \nu_{12} | ||
+ | | Poisson ratio \nu_{13} | ||
+ | | Poisson ratio \nu_{23} | ||
+ | | Shear modulus G_{12} | ||
+ | | Shear modulus G_{13} | ||
+ | | Shear modulus G_{23} | ||
+ | | Number of the material law which defines the yield stress \sigma_{yield} | ||
+ | | Number of the plastic criterion | ||
+ | | Objectivity method \\ (Jaumann = 0, GreenNaghdi = 1)| '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | |||
+ | ===== TmEpIsoHOrthoHypoMaterial ===== | ||
+ | :!: Metafor version >=3536 | ||
+ | === Description === | ||
+ | Thermomechanical elastoplastic orthotropic material with isotropic hardening. The thermal part of the law is similar to the one of the [[# | ||
+ | |||
+ | === Parameters === | ||
+ | ^ | ||
+ | | Density | ||
+ | | Young Modulus E_1 | '' | ||
+ | | Young Modulus E_2 | '' | ||
+ | | Young Modulus E_3 | '' | ||
+ | | Poisson ratio \nu_{12} | ||
+ | | Poisson ratio \nu_{13} | ||
+ | | Poisson ratio \nu_{23} | ||
+ | | Shear modulus G_{12} | ||
+ | | Shear modulus G_{13} | ||
+ | | Shear modulus G_{23} | ||
+ | | Number of the material law which defines the yield stress \sigma_{yield} | ||
+ | | Number of the plastic criterion | ||
+ | | Objectivity method | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Thermal Expansion \alpha_1 | ||
+ | | Thermal Expansion \alpha_2 | ||
+ | | Thermal Expansion \alpha_3 | ||
+ | | Conductivity K_1 | '' | ||
+ | | Conductivity K_2 | '' | ||
+ | | Conductivity K_3 | '' | ||
+ | | Heat Capacity C_p | '' | ||
+ | | Dissipated thermoelastic power fraction \eta_e | ||
+ | | Dissipated (visco)plastic power fraction (Taylor-Quinney factor) | ||
+ | ===== DamageEpIsoHOrthoHypoMaterial ===== | ||
+ | |||
+ | === Description === | ||
+ | |||
+ | Elastoplastic orthotropic material with isotropic hardening and damage. | ||
+ | |||
+ | The elastoplastic part has the same characteristics as the [[# | ||
+ | |||
+ | The damage part consists in a material softening governed by one or several damage variables d_{ij}, whose value is included between 0 and 1. Typically, a modulus equal to E_i before damage becomes (1-d_i)\,E_i once damage appears, but not always. The way damage is induced depends on the law defined by the parameter '' | ||
+ | |||
+ | === Parameters === | ||
+ | |||
+ | ^ | ||
+ | | Density | ||
+ | | Young Modulus E_1 | '' | ||
+ | | Young Modulus E_2 | '' | ||
+ | | Young Modulus E_3 | '' | ||
+ | | Poisson ratio \nu_{12} | ||
+ | | Poisson ratio \nu_{13} | ||
+ | | Poisson ratio \nu_{23} | ||
+ | | Shear modulus G_{12} | ||
+ | | Shear modulus G_{13} | ||
+ | | Shear modulus G_{23} | ||
+ | | Number of the material law which defines the yield stress \sigma_{yield} | ||
+ | | Number of the plastic criterion | ||
+ | | Number of the damage law | '' | ||
+ | | Maximal value of damage variables (failure) | ||
+ | | Objectivity method \\ (Jaumann = 0, GreenNaghdi = 1)| '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' | ||
+ | | Orthotropic axis | '' |