DP_PS.hGo to the documentation of this file.00001 00002 //################################################################################ 00003 //# COPYRIGHT (C): :-)) # 00004 //# PROJECT: Object Oriented Finite Element Program # 00005 //# PURPOSE: Drucker - Prager potential criterion # 00006 //# CLASS: DPPotentialSurface # 00007 //# # 00008 //# VERSION: # 00009 //# LANGUAGE: C++.ver >= 2.0 ( Borland C++ ver=3.00, SUN C++ ver=2.1 ) # 00010 //# TARGET OS: DOS || UNIX || . . . # 00011 //# PROGRAMMER(S): Boris Jeremic, ZHaohui Yang # 00012 //# # 00013 //# # 00014 //# DATE: August 03 '93 # 00015 //# UPDATE HISTORY: August 08 '00 # 00016 //# # 00017 //# # 00018 //# # 00019 //# # 00020 //# SHORT EXPLANATION: # 00021 //# # 00022 //# if alfa1#=0 && alfa2#=0 && alfa1#=alfa2 => # 00023 //# Drucker-Prager with non-associated flow rule # 00024 //# # 00025 //# if alfa1#=0 && alfa2#=0 && alfa1==alfa2 => # 00026 //# Drucker-Prager with associated flow rule # 00027 //# # 00028 //# if alfa1==0 && alfa2#=0 => # 00029 //# Von Mises with non-associated Drucker-Prager flow rule # 00030 //# # 00031 //# if alfa1#=0 && alfa2==0 => # 00032 //# Drucker-Prager with non-associated Von Mises flow rule # 00033 //# # 00034 //# if alfa1==0 && alfa2==0 => # 00035 //# Von Mises with associated flow rule # 00036 //# # 00037 //################################################################################ 00038 //*/ 00039 00040 #ifndef DP_PS_H 00041 #define DP_PS_H 00042 00043 #include "PS.h" 00044 #include "EPState.h" 00045 #include <BJtensor.h> 00046 00047 00048 class DPPotentialSurface : public PotentialSurface 00049 { 00050 private: // Private vars to define the Drucker-Prager Potential Surface 00051 double alfa2; // potential surface orientation angle 00052 00053 public: 00054 DPPotentialSurface( double a2d = 0.0 ) : alfa2(a2d) {} // Default constructor 00055 virtual ~DPPotentialSurface() { }; //Virtual functions not all redefined 00056 DPPotentialSurface( const DPPotentialSurface &DPPS ); //Copy constructor 00057 PotentialSurface *newObj(); //create a colne of itself 00058 double getalfa2() const; 00059 00060 tensor dQods(const EPState *EPS) const; 00061 tensor d2Qods2(const EPState *EPS) const; 00062 00063 tensor d2Qodsds1(const EPState *EPS) const; // For Consistent Algorithm, Z Cheng, Jan 2004 00064 00065 void print() { opserr << *this; }; 00066 00067 //================================================================================ 00068 // Overloaded Insertion Operator 00069 // prints an DP-PotentialSurface's contents 00070 //================================================================================ 00071 friend OPS_Stream& operator<< (OPS_Stream& os, const DPPotentialSurface &PS); 00072 00073 }; 00074 00075 #endif 00076
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