OpenSees » SRC » material » uniaxial

ViscousMaterial.h

Go 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: 1.5 $
00022 // $Date: 2006/08/03 23:42:19 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/ViscousMaterial.h,v $
00024                                                                         
00025 // Written: Mehrdad Sasani 
00026 // Created: June 2000
00027 // Revision: A
00028 //
00029 // Description: This file contains the class interface for 
00030 // ViscousMaterial.  ViscousMaterial defines a force(F)-velocity(v)
00031 // relationship of the form F = C*pow(v,a), where C is a prescribed
00032 // constant and a is a real number.
00033 
00034 #ifndef ViscousMaterial_h
00035 #define ViscousMaterial_h
00036 
00037 #include <UniaxialMaterial.h>
00038 
00039 class ViscousMaterial : public UniaxialMaterial
00040 {
00041   public:
00042     ViscousMaterial(int tag, double C, double Alpha);    
00043     ViscousMaterial(); 
00044     ~ViscousMaterial();
00045 
00046     const char *getClassType(void) const {return "ViscousMaterial";};
00047 
00048     int setTrialStrain(double velocity, double strainRate = 0.0); 
00049     double getStrain(void); 
00050     double getStrainRate(void);
00051     double getStress(void);
00052 
00053     double getTangent(void);
00054     double getInitialTangent(void);
00055     double getDampTangent(void);
00056 
00057 
00058     int commitState(void);
00059     int revertToLastCommit(void);    
00060     int revertToStart(void);        
00061 
00062     UniaxialMaterial *getCopy(void);
00063     
00064     int sendSelf(int commitTag, Channel &theChannel);  
00065     int recvSelf(int commitTag, Channel &theChannel, 
00066                  FEM_ObjectBroker &theBroker);    
00067     
00068     void Print(OPS_Stream &s, int flag =0);
00069     
00070   protected:
00071     
00072   private:
00073     double trialRate;
00074     double C;
00075     double Alpha;
00076 };
00077 
00078 
00079 #endif
00080

Generated on Mon Oct 23 15:05:22 2006 for OpenSees by doxygen 1.5.0