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Linear_Eeq.cpp

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00001 
00002 //   COPYLEFT (C): Woody's viral GPL-like license (by BJ):
00003 //                 ``This    source  code is Copyrighted in
00004 //                 U.S.,  for  an  indefinite  period,  and anybody
00005 //                 caught  using it without our permission, will be
00006 //                 mighty good friends of ourn, cause we don't give
00007 //                 a  darn.  Hack it. Compile it. Debug it. Run it.
00008 //                 Yodel  it.  Enjoy it. We wrote it, that's all we
00009 //                 wanted to do.''
00010 //
00011 //
00012 // COPYRIGHT (C):     :-))
00013 // PROJECT:           Object Oriented Finite Element Program
00014 // FILE:              
00015 // CLASS:             
00016 // MEMBER FUNCTIONS:
00017 //
00018 // MEMBER VARIABLES
00019 //
00020 // PURPOSE:           
00021 //
00022 // RETURN:
00023 // VERSION:
00024 // LANGUAGE:          C++
00025 // TARGET OS:         
00026 // DESIGNER:          Zhao Cheng, Boris Jeremic
00027 // PROGRAMMER:        Zhao Cheng, 
00028 // DATE:              Fall 2005
00029 // UPDATE HISTORY:    
00030 //
00032 //
00033 
00034 #ifndef Linear_Eeq_CPP
00035 #define Linear_Eeq_CPP
00036 
00037 #include "Linear_Eeq.h"
00038 
00039 Linear_Eeq::Linear_Eeq(int LinearFactor_index_in)
00040 : LinearFactor_index(LinearFactor_index_in)
00041 {
00042 
00043 }
00044 
00045 ScalarEvolution* Linear_Eeq::newObj()
00046 {
00047     ScalarEvolution* nObj = new Linear_Eeq(this->LinearFactor_index);
00048     
00049     return nObj;
00050 }
00051 
00052 double Linear_Eeq::H(const straintensor& plastic_flow, const stresstensor& Stre, 
00053                      const straintensor& Stra, const MaterialParameter& material_parameter)
00054 {
00055     return plastic_flow.equivalent() * getLinearFactor(material_parameter);
00056 }
00057 
00058 double Linear_Eeq::getLinearFactor(const MaterialParameter& material_parameter) const
00059 {
00060     if ( LinearFactor_index <= material_parameter.getNum_Material_Parameter() && LinearFactor_index > 0)
00061         return material_parameter.getMaterial_Parameter(LinearFactor_index-1);
00062     else {
00063         opserr << "Linear_Eeq: Invalid Input. " << endln;
00064         exit (1);
00065     }
00066 } 
00067 
00068 
00069 #endif
00070

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