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MultiaxialCyclicPlasticity3D.cpp Go to the documentation of this file. /* ****************************************************************** ** ** OpenSees - Open System for Earthquake Engineering Simulation ** ** Pacific Earthquake Engineering Research Center ** ** ** ** ** ** (C) Copyright 1999, The Regents of the University of California ** ** All Rights Reserved. ** ** ** ** Commercial use of this program without express permission of the ** ** University of California, Berkeley, is strictly prohibited. See ** ** file 'COPYRIGHT' in main directory for information on usage and ** ** redistribution, and for a DISCLAIMER OF ALL WARRANTIES. ** ** ** ** ****************************************************************** */ /*----+----+----+----+----+----+----+----+----+----+----+----+----+----+----* | | | MultiaxialCyclicPlasticity NDMaterial | + + |--------------------------------------------------------------------------| | | + Authors: Gang Wang AND Professor Nicholas Sitar + | | | Department of Civil and Environmental Engineering | + Univeristy of California, Berkeley, CA 94720, USA + | | | Email: wang@ce.berkeley.edu (G.W.) | | | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----*/ #include <MultiaxialCyclicPlasticity3D.h> #include <Channel.h> #include <FEM_ObjectBroker.h> //static vectors and matrices Vector MultiaxialCyclicPlasticity3D :: strain_vec(6) ; Vector MultiaxialCyclicPlasticity3D :: stress_vec(6) ; Matrix MultiaxialCyclicPlasticity3D :: tangent_matrix(6,6) ; //null constructor MultiaxialCyclicPlasticity3D :: MultiaxialCyclicPlasticity3D( ) : MultiaxialCyclicPlasticity( ) { } //full constructor MultiaxialCyclicPlasticity3D :: MultiaxialCyclicPlasticity3D( int tag, double rho, double K, double G, double Su, double Ho_kin, double Parameter_h, double Parameter_m, double Parameter_beta, double Kcoeff, double viscosity ) : MultiaxialCyclicPlasticity( tag, ND_TAG_MultiaxialCyclicPlasticity3D, rho, K, G, Su, Ho_kin, Parameter_h, Parameter_m, Parameter_beta, Kcoeff, viscosity) { } //elastic constructor MultiaxialCyclicPlasticity3D :: MultiaxialCyclicPlasticity3D( int tag, double rho, double K, double G ) : MultiaxialCyclicPlasticity( tag, ND_TAG_MultiaxialCyclicPlasticity3D, rho, K, G ) { } //destructor MultiaxialCyclicPlasticity3D :: ~MultiaxialCyclicPlasticity3D( ) { } //make a clone of this material NDMaterial* MultiaxialCyclicPlasticity3D :: getCopy( ) { MultiaxialCyclicPlasticity3D *clone; clone = new MultiaxialCyclicPlasticity3D( ) ; //new instance of this class *clone = *this ; //asignment to make copy return clone ; } //send back type of material const char* MultiaxialCyclicPlasticity3D :: getType( ) const { return "ThreeDimensional" ; } //send back order of strain in vector form int MultiaxialCyclicPlasticity3D :: getOrder( ) const { return 6 ; } //get the strain and integrate plasticity equations int MultiaxialCyclicPlasticity3D :: setTrialStrain( const Vector &strain_from_element) { strain.Zero( ) ; strain(0,0) = strain_from_element(0) ; strain(1,1) = strain_from_element(1) ; strain(2,2) = strain_from_element(2) ; strain(0,1) = 0.50 * strain_from_element(3) ; strain(1,0) = strain(0,1) ; strain(1,2) = 0.50 * strain_from_element(4) ; strain(2,1) = strain(1,2) ; strain(2,0) = 0.50 * strain_from_element(5) ; strain(0,2) = strain(2,0) ; //opserr<<"DP:setTrialStrain:MaterialStageID= "<<this->MaterialStageID<<endln; if (this->MaterialStageID ==1) { //opserr<<"DP:setTrialStrain:elastic K0"<<endln; this->elastic_integrator( ) ; } else if (this->MaterialStageID ==2) { //opserr<<"DP:setTrialStrain:plastic"<<endln; // initialize history variables here in first call??? this->plastic_integrator( ) ; } return 0 ; } //unused trial strain functions int MultiaxialCyclicPlasticity3D :: setTrialStrain( const Vector &v, const Vector &r ) { return this->setTrialStrain( v ) ; } int MultiaxialCyclicPlasticity3D :: setTrialStrainIncr( const Vector &v ) { static Vector newStrain(6); newStrain(0) = strain(0,0) + v(0); newStrain(1) = strain(1,1) + v(1); newStrain(2) = strain(2,2) + v(2); newStrain(3) = 2.0*strain(0,1) + v(3); newStrain(4) = 2.0*strain(1,2) + v(4); newStrain(5) = 2.0*strain(2,0) + v(5); return this->setTrialStrain(newStrain); } int MultiaxialCyclicPlasticity3D :: setTrialStrainIncr( const Vector &v, const Vector &r ) { return this->setTrialStrainIncr(v); } //send back the strain const Vector& MultiaxialCyclicPlasticity3D :: getStrain( ) { strain_vec(0) = strain(0,0) ; strain_vec(1) = strain(1,1) ; strain_vec(2) = strain(2,2) ; strain_vec(3) = 2.0 * strain(0,1) ; strain_vec(4) = 2.0 * strain(1,2) ; strain_vec(5) = 2.0 * strain(2,0) ; return strain_vec ; } //send back the stress const Vector& MultiaxialCyclicPlasticity3D :: getStress( ) { stress_vec(0) = stress(0,0) ; stress_vec(1) = stress(1,1) ; stress_vec(2) = stress(2,2) ; stress_vec(3) = stress(0,1) ; stress_vec(4) = stress(1,2) ; stress_vec(5) = stress(2,0) ; return stress_vec ; } //send back the tangent const Matrix& MultiaxialCyclicPlasticity3D :: getTangent( ) { // matrix to tensor mapping // Matrix Tensor // ------- ------- // 0 0 0 // 1 1 1 // 2 2 2 // 3 0 1 ( or 1 0 ) // 4 1 2 ( or 2 1 ) // 5 2 0 ( or 0 2 ) int ii, jj ; int i, j, k, l ; for ( ii = 0; ii < 6; ii++ ) { for ( jj = 0; jj < 6; jj++ ) { index_map( ii, i, j ) ; index_map( jj, k, l ) ; tangent_matrix(ii,jj) = tangent[i][j][k][l] ; } //end for j } //end for i return tangent_matrix ; } //send back the tangent const Matrix& MultiaxialCyclicPlasticity3D :: getInitialTangent( ) { // matrix to tensor mapping // Matrix Tensor // ------- ------- // 0 0 0 // 1 1 1 // 2 2 2 // 3 0 1 ( or 1 0 ) // 4 1 2 ( or 2 1 ) // 5 2 0 ( or 0 2 ) int ii, jj ; int i, j, k, l ; this->doInitialTangent(); for ( ii = 0; ii < 6; ii++ ) { for ( jj = 0; jj < 6; jj++ ) { index_map( ii, i, j ) ; index_map( jj, k, l ) ; tangent_matrix(ii,jj) = initialTangent[i][j][k][l] ; } //end for j } //end for i return tangent_matrix ; } //this is mike's problem int MultiaxialCyclicPlasticity3D :: setTrialStrain(const Tensor &v) { return -1 ; } int MultiaxialCyclicPlasticity3D :: setTrialStrain(const Tensor &v, const Tensor &r) { return -1 ; } int MultiaxialCyclicPlasticity3D :: setTrialStrainIncr(const Tensor &v) { return -1 ; } int MultiaxialCyclicPlasticity3D :: setTrialStrainIncr(const Tensor &v, const Tensor &r) { return -1 ; } const Tensor& MultiaxialCyclicPlasticity3D :: getTangentTensor( ) { return rank4 ; } //jeremic@ucdavis.edu 22jan2001const Tensor& J2ThreeDimensional :: getStressTensor( ) //jeremic@ucdavis.edu 22jan2001{ //jeremic@ucdavis.edu 22jan2001 return rank2 ; //jeremic@ucdavis.edu 22jan2001} //jeremic@ucdavis.edu 22jan2001 //jeremic@ucdavis.edu 22jan2001const Tensor& J2ThreeDimensional :: getStrainTensor( ) //jeremic@ucdavis.edu 22jan2001{ //jeremic@ucdavis.edu 22jan2001 return rank2 ; //jeremic@ucdavis.edu 22jan2001} Generated on Mon Oct 23 15:05:13 2006 for OpenSees by  1.5.0

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