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--- doc:user:elements:volumes:thixo_isohard [2013/07/11 15:15] – created joris
+++ doc:user:elements:volumes:thixo_isohard [2016/03/30 15:23] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Isotropic hardening ======
+The ''IsotropicHardening'' class manages all isotropic hardening laws in Metafor. The laws developed for thixotropic materials are are described below.
+===== ShimaOyaneIsotropicHardening =====
+=== Description ===
+Isotropic hardening, specific for thixotropic materials. Shima and Oyane extended laws, only taking one internal parameter into account, the [doc:user:elements:volumes:thixo_scheilliquidfractionmatlaw|liquid fraction]], either full ($ f_l $ if SSIH_EFF = 0) or effective: ($ f_l^{eff} if SSIH_EFF = 1) .
+$$
+\sigma_{vm} = \sigma_{vm}^{sol} (1-f_l)^{h_2}
+$$
+where $$ \sigma_{vm}^{sol} $$ is the yield stress for the solid phase, computed using any isotropic hardening law.
+=== Parameters ===
+^          Name                                         ^  Metafor Code^ Dependency ^
+|Number of the isotropic hardening law              |  ''SSIH_NUM''  |  ''TM/TO''         |
+|Shima et Oyane parameter $h_2 $                    |   ''SSIH_H2''  |  ''TM/TO''         |
+|Use of full or effective liquid fraction           |   ''SSIH_EFF''  |  '' / ''         |
+:!: Careful: Only works if used with thixotropic materials (''ThixoEvpIsoHHypoMaterial'' or  ''ThixoTmEvpIsoHHypoMaterial'').