DP_YS.hGo to the documentation of this file.00001 00002 //################################################################################ 00003 //# COPYRIGHT (C): :-)) # 00004 //# PROJECT: Object Oriented Finite Element Program # 00005 //# PURPOSE: Drucker - Prager yield criterion # 00006 //# CLASS: DPYieldSurface # 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_YS_H 00041 #define DP_YS_H 00042 00043 #include <stresst.h> 00044 #include <BJtensor.h> 00045 #include "EPState.h" 00046 #include "YS.h" 00047 00048 00049 class DPYieldSurface : public YieldSurface 00050 { 00051 private: // Private vars to define the Drucker-Prager Yield Surface 00052 //double alfa1; // Cone orientation angle now in EPState's first scalar var 00053 00054 public: 00055 //alpha machines complains on this 00056 //DPYieldSurface *newObj(); //create a clone of itself 00057 YieldSurface *newObj(); //create a clone of itself 00058 00059 DPYieldSurface ( ) {} // Default constructor 00060 virtual ~DPYieldSurface ( ); // Destructor //Virtual functions not all redefined 00061 //DPYieldSurface (const DPYieldSurface & ); // copy constructor 00062 00063 double f(const EPState *EPS) const; 00064 tensor dFods(const EPState *EPS) const; 00065 00066 // Redefine 1st derivative of F over scalar internal variables 00067 double xi_s1( const EPState *EPS ) const; 00068 double xi_s2( const EPState *EPS ) const; 00069 00070 // Redefine 1st derivative of F over tensorial internal variables 00071 tensor xi_t1(const EPState *EPS) const; 00072 00073 void print() { opserr << *this; }; 00074 00075 //================================================================================ 00076 // Overloaded Insertion Operator 00077 // prints an DP YieldSurface's contents 00078 //================================================================================ 00079 friend OPS_Stream& operator<< (OPS_Stream& os, const DPYieldSurface & YS); 00080 00081 }; 00082 00083 #endif 00084
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