FatigueMaterial.h

//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis Claudio Pérez Tato
//
//  This program derives from OpenSees <http://opensees.berkeley.edu>
//  developed by the  «Pacific earthquake engineering research center».
//
//  Except for the restrictions that may arise from the copyright
//  of the original program (see copyright_opensees.txt)
//  XC is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or 
//  (at your option) any later version.
//
//  This software is distributed in the hope that it will be useful, but 
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details. 
//
//
// You should have received a copy of the GNU General Public License 
// along with this program.
// If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------------
/* ****************************************************************** **
**    OpenSees - Open System for Earthquake Engineering Simulation    **
**          Pacific Earthquake Engineering Research Center            **
**                                                                    **
**                                                                    **
** (C) Copyright 1999, The Regents of the University of California    **
** All Rights Reserved.                                               **
**                                                                    **
** Commercial use of this program without express permission of the   **
** University of California, Berkeley, is strictly prohibited.  See   **
** file 'COPYRIGHT'  in main directory for information on usage and   **
** redistribution,  and for a DISCLAIMER OF ALL WARRANTIES.           **
**                                                                    **
** Developed by:                                                      **
**   Frank McKenna (fmckenna@ce.berkeley.edu)                         **
**   Gregory L. Fenves (fenves@ce.berkeley.edu)                       **
**   Filip C. Filippou (filippou@ce.berkeley.edu)                     **
**                                                                    **
** ****************************************************************** */
                                                                        
// $Revision: 1.1 $
// $Date: 2003/08/14 20:23:50 $
// $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/FatigueMaterial.h,v $
                                                      
// Written: Patxi
// Created: Aug 2003
//
// Description: This file contains the class definition for 
// FatigueMaterial.  FatigueMaterial wraps a UniaxialMaterial
// and imposes fatigue limits.

#ifndef FatigueMaterial_h
#define FatigueMaterial_h

#include <material/uniaxial/UniaxialMaterial.h>

namespace XC {
//
class FatigueMaterial : public UniaxialMaterial
  {
  private:
    UniaxialMaterial *theMaterial;

    double D;   
    double X;   
    double Y;   
    double A;   
    double B;   
    int R1F;    
    int R2F;    
    double CS;  
    double PS;  
    double EP;  
    int FF;     
    int SF;     
    int PF;     
    
    double Dmax; 
    double Nf;   
    double E0;   
    double FE;   
    double b;    
    
    bool Tfailed;
    bool Cfailed;
  public:
    FatigueMaterial(int tag, UniaxialMaterial &material, 
            double Dmax = 1.0,
            double Nf  = 0.5E6,
            double E0  = 14.5/29000.0,
            double FE  = -1.0/2.31);
    FatigueMaterial(int tag);
    FatigueMaterial(void);
    ~FatigueMaterial(void);

    int setTrialStrain(double strain, double strainRate = 0.0); 
    double getStrain(void) const;          
    double getStrainRate(void) const;
    double getStress(void) const;
    double getTangent(void) const;
    double getDampTangent(void) const;
    inline double getInitialTangent(void) const
      { return theMaterial->getInitialTangent();}

    int commitState(void);
    int revertToLastCommit(void);    
    int revertToStart(void);        

    UniaxialMaterial *getCopy(void) const;
    
    int sendSelf(CommParameters &);  
    int recvSelf(const CommParameters &);
    
    void Print(std::ostream &s, int flag =0);
  };
} // end of XC namespace


#endif