HardeningMaterial.hGo to the documentation of this file.00001 /* ****************************************************************** ** 00002 ** OpenSees - Open System for Earthquake Engineering Simulation ** 00003 ** Pacific Earthquake Engineering Research Center ** 00004 ** ** 00005 ** ** 00006 ** (C) Copyright 1999, The Regents of the University of California ** 00007 ** All Rights Reserved. ** 00008 ** ** 00009 ** Commercial use of this program without express permission of the ** 00010 ** University of California, Berkeley, is strictly prohibited. See ** 00011 ** file 'COPYRIGHT' in main directory for information on usage and ** 00012 ** redistribution, and for a DISCLAIMER OF ALL WARRANTIES. ** 00013 ** ** 00014 ** Developed by: ** 00015 ** Frank McKenna (fmckenna@ce.berkeley.edu) ** 00016 ** Gregory L. Fenves (fenves@ce.berkeley.edu) ** 00017 ** Filip C. Filippou (filippou@ce.berkeley.edu) ** 00018 ** ** 00019 ** ****************************************************************** */ 00020 00021 // $Revision: 1.11 $ 00022 // $Date: 2006/09/05 22:22:58 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/HardeningMaterial.h,v $ 00024 00025 #ifndef HardeningMaterial_h 00026 #define HardeningMaterial_h 00027 00028 // Written: MHS 00029 // Created: May 2000 00030 // 00031 // Description: This file contains the class definition for 00032 // HardeningMaterial. HardeningMaterial provides the abstraction 00033 // for a one-dimensional rate-independent plasticity model 00034 // with combined isotropic and kinematic hardening. 00035 00036 #include <UniaxialMaterial.h> 00037 #include <Matrix.h> 00038 00039 class HardeningMaterial : public UniaxialMaterial 00040 { 00041 public: 00042 HardeningMaterial(int tag, double E, double sigmaY, 00043 double K, double H, double eta = 0.0); 00044 HardeningMaterial(); 00045 ~HardeningMaterial(); 00046 00047 const char *getClassType(void) {return "HardeningMaterial";}; 00048 00049 int setTrialStrain(double strain, double strainRate = 0.0); 00050 double getStrain(void); 00051 double getStress(void); 00052 double getTangent(void); 00053 double getInitialTangent(void) {return E;}; 00054 00055 int commitState(void); 00056 int revertToLastCommit(void); 00057 int revertToStart(void); 00058 00059 UniaxialMaterial *getCopy(void); 00060 00061 int sendSelf(int commitTag, Channel &theChannel); 00062 int recvSelf(int commitTag, Channel &theChannel, 00063 FEM_ObjectBroker &theBroker); 00064 00065 void Print(OPS_Stream &s, int flag =0); 00066 00067 // AddingSensitivity:BEGIN ////////////////////////////////////////// 00068 int setParameter (const char **argv, int argc, Parameter ¶m); 00069 int updateParameter (int parameterID, Information &info); 00070 int activateParameter (int parameterID); 00071 double getStressSensitivity (int gradNumber, bool conditional); 00072 double getInitialTangentSensitivity (int gradNumber); 00073 int commitSensitivity (double strainGradient, int gradNumber, int numGrads); 00074 // AddingSensitivity:END /////////////////////////////////////////// 00075 00076 protected: 00077 00078 private: 00079 // Material parameters 00080 double E; // Elastic modulus 00081 double sigmaY; // Yield stress 00082 double Hiso; // Isotropic hardening parameter 00083 double Hkin; // Kinematic hardening parameter 00084 double eta; 00085 00086 // Committed history variables 00087 double CplasticStrain; // Committed plastic strain 00088 double CbackStress; // Committed back stress; 00089 double Chardening; // Committed internal hardening variable 00090 00091 // Trial history variables 00092 double TplasticStrain; // Trial plastic strain 00093 double TbackStress; // Trial back stress 00094 double Thardening; // Trial internal hardening variable 00095 00096 // Trial state variables 00097 double Tstrain; // Trial strain 00098 double Tstress; // Trial stress 00099 double Ttangent; // Trial tangent 00100 00101 // AddingSensitivity:BEGIN ////////////////////////////////////////// 00102 int parameterID; 00103 Matrix *SHVs; 00104 // AddingSensitivity:END /////////////////////////////////////////// 00105 }; 00106 00107 00108 #endif 00109
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