FatigueMaterial.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: 1.4 $ 00022 // $Date: 2006/08/18 23:00:31 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/FatigueMaterial.h,v $ 00024 00025 // Written: Patxi 00026 // Created: Aug 2003 00027 // 00028 // Description: This file contains the class definition for 00029 // FatigueMaterial. FatigueMaterial wraps a UniaxialMaterial 00030 // and imposes fatigue limits. More information about this material can 00031 // be found in the doctoral dissertation of Patxi Uriz: 00032 // 00033 // Uriz, Patxi, "Towards Earthquake Resistant Design of 00034 // Concentrically Braced Steel Frames," Ph.D. Dissertation, 00035 // Structural Engineering, Mechanics, and Materials, Civil 00036 // and Envrironmental Engineering, University of California, 00037 // Berkeley, December 2005 00038 // 00039 00040 00041 00042 #ifndef FatigueMaterial_h 00043 #define FatigueMaterial_h 00044 00045 #include <UniaxialMaterial.h> 00046 00047 class FatigueMaterial : public UniaxialMaterial 00048 { 00049 public: 00050 // Default calibrated values from Ballio and Castiglioni Calibrations for 00051 // European steel, wide flange sections. 00052 00053 FatigueMaterial(int tag, UniaxialMaterial &material, 00054 double Dmax = 1.0, 00055 double E0 = 0.191, 00056 double m = -0.458, 00057 double minStrain = -1.0e16, 00058 double maxStrain = 1.0e16 ); 00059 00060 FatigueMaterial(); 00061 ~FatigueMaterial(); 00062 00063 const char *getClassType(void) const {return "FatigueMaterial";}; 00064 00065 int setTrialStrain(double strain, double strainRate = 0.0); 00066 double getStrain(void); 00067 double getStrainRate(void); 00068 double getStress(void); 00069 double getTangent(void); 00070 double getDampTangent(void); 00071 double getInitialTangent(void) {return theMaterial->getInitialTangent();} 00072 00073 int commitState(void); 00074 int revertToLastCommit(void); 00075 int revertToStart(void); 00076 00077 UniaxialMaterial *getCopy(void); 00078 00079 int sendSelf(int commitTag, Channel &theChannel); 00080 int recvSelf(int commitTag, Channel &theChannel, 00081 FEM_ObjectBroker &theBroker); 00082 00083 void Print(OPS_Stream &s, int flag =0); 00084 00085 Response *setResponse (const char **argv, int argc, Information &matInformation, OPS_Stream &s); 00086 int getResponse (int responseID, Information &matInformation); 00087 00088 protected: 00089 00090 private: 00091 UniaxialMaterial *theMaterial; 00092 00093 double DI; //Damage index 00094 double X; //Range in consideration 00095 double Y; //Previous Adjacent Range 00096 double A; //Peak or valley 1 00097 double B; //Peak or valley 2 00098 double C; //Peak or valley 2 00099 double D; //Peak or valley 4 00100 int PCC; /*Previous Cycle counter flag if >1 then previous 'n' 00101 cycles did not flag a complete cycle */ 00102 int R1F; //Flag for first peak count 00103 int R2F; //Flag for second peak count 00104 double CS; //Current Slope 00105 double PS; //Previous slope 00106 double EP; //Previous Strain 00107 int SF; /*Start Flag = 0 if very first strain, 00108 (i.e. when initializing) = 1 otherwise */ 00109 double DL; //Damage if current strain was last peak. 00110 00111 double Dmax; 00112 double E0; 00113 double m; 00114 00115 double minStrain; 00116 double maxStrain; 00117 00118 bool Cfailed; 00119 double trialStrain; 00120 00121 // added 6/9/2006 00122 // For recording strain ranges (SRXX) and Number of Cycles (NCXX) 00123 double SR1; // Committed strain range at peak 00124 double NC1; // Committed number of cycles at SR1 (i.e. 1.0 or 0.5) 00125 double SR2; // Committed strain range 2 at PSUEDO peak - there are potentially two ranges 00126 double NC2; // Committed number of cycles at SR2 2 (at PSUEDO peak) - there are potentially two ranges 00127 double SR3; // Committed strain range 3 at PSUEDO peak - there are potentially two ranges 00128 double NC3; // Committed number of cycles at SR2 3 (at PSUEDO peak) - there are potentially two ranges 00129 00130 }; 00131 00132 00133 #endif 00134
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