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MultiaxialCyclicPlasticityPlaneStrain.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 <MultiaxialCyclicPlasticityPlaneStrain.h> #include <Channel.h> #include <FEM_ObjectBroker.h> //static vectors and matrices Vector MultiaxialCyclicPlasticityPlaneStrain :: strain_vec(3) ; Vector MultiaxialCyclicPlasticityPlaneStrain :: stress_vec(3) ; Matrix MultiaxialCyclicPlasticityPlaneStrain :: tangent_matrix(3,3) ; //null constructor MultiaxialCyclicPlasticityPlaneStrain :: MultiaxialCyclicPlasticityPlaneStrain( ) : MultiaxialCyclicPlasticity( ) { } //full constructor MultiaxialCyclicPlasticityPlaneStrain :: MultiaxialCyclicPlasticityPlaneStrain (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_MultiaxialCyclicPlasticityPlaneStrain, rho, K, G, Su, Ho_kin, Parameter_h, Parameter_m, Parameter_beta, Kcoeff, viscosity) { } //elastic constructor MultiaxialCyclicPlasticityPlaneStrain :: MultiaxialCyclicPlasticityPlaneStrain( int tag, double rho, // add density by Gang Wang double K, double G ) : MultiaxialCyclicPlasticity( tag, ND_TAG_MultiaxialCyclicPlasticityPlaneStrain, rho, K, G ) { } //destructor MultiaxialCyclicPlasticityPlaneStrain :: ~MultiaxialCyclicPlasticityPlaneStrain( ) { } //make a clone of this material NDMaterial* MultiaxialCyclicPlasticityPlaneStrain :: getCopy( ) { MultiaxialCyclicPlasticityPlaneStrain *clone; clone = new MultiaxialCyclicPlasticityPlaneStrain() ; //new instance of this class *clone = *this ; //asignment to make copy return clone ; } //send back type of material const char* MultiaxialCyclicPlasticityPlaneStrain :: getType( ) const { return "PlaneStrain2D" ; } //send back order of strain in vector form int MultiaxialCyclicPlasticityPlaneStrain :: getOrder( ) const { return 3 ; } //get the strain and integrate plasticity equations int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrain( const Vector &strain_from_element) { strain.Zero( ) ; strain(0,0) = strain_from_element(0) ; strain(1,1) = strain_from_element(1) ; strain(0,1) = 0.50 * strain_from_element(2) ; strain(1,0) = strain(0,1) ; if (this->MaterialStageID ==1) { this->elastic_integrator( ) ; } else if (this->MaterialStageID ==2) { this->plastic_integrator( ) ; } return 0 ; } //unused trial strain functions int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrain( const Vector &v, const Vector &r ) { return this->setTrialStrain( v ) ; } int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrainIncr( const Vector &v ) { static Vector newStrain(3); newStrain(0) = strain(0,0) + v(0); newStrain(1) = strain(1,1) + v(1); newStrain(2) = 2.0 * strain(0,1) + v(2); return this->setTrialStrain(newStrain); } int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrainIncr( const Vector &v, const Vector &r ) { // implemented April. 4, 2004, Gang Wang static Vector newStrain(3); newStrain(0) = strain(0,0) + v(0); newStrain(1) = strain(1,1) + v(1); newStrain(2) = 2.0*strain(0,1) + v(2); return this->setTrialStrain(newStrain); } //send back the strain const Vector& MultiaxialCyclicPlasticityPlaneStrain :: getStrain( ) { strain_vec(0) = strain(0,0) ; strain_vec(1) = strain(1,1) ; strain_vec(2) = 2.0 * strain(0,1) ; return strain_vec ; } //send back the stress const Vector& MultiaxialCyclicPlasticityPlaneStrain :: getStress( ) { stress_vec(0) = stress(0,0) ; stress_vec(1) = stress(1,1) ; stress_vec(2) = stress(0,1) ; return stress_vec ; } //send back the tangent const Matrix& MultiaxialCyclicPlasticityPlaneStrain :: getTangent( ) { // matrix to tensor mapping // Matrix Tensor // ------- ------- // 0 0 0 // 1 1 1 // 2 0 1 ( or 1 0 ) // tangent_matrix(0,0) = tangent [0][0] [0][0] ; tangent_matrix(1,1) = tangent [1][1] [1][1] ; tangent_matrix(2,2) = tangent [0][1] [0][1] ; tangent_matrix(0,1) = tangent [0][0] [1][1] ; tangent_matrix(1,0) = tangent [1][1] [0][0] ; tangent_matrix(0,2) = tangent [0][0] [0][1] ; tangent_matrix(2,0) = tangent [0][1] [0][0] ; tangent_matrix(1,2) = tangent [1][1] [0][1] ; tangent_matrix(2,1) = tangent [0][1] [1][1] ; return tangent_matrix ; } //send back the tangent const Matrix& MultiaxialCyclicPlasticityPlaneStrain :: getInitialTangent( ) { // matrix to tensor mapping // Matrix Tensor // ------- ------- // 0 0 0 // 1 1 1 // 2 0 1 ( or 1 0 ) // this->doInitialTangent(); tangent_matrix(0,0) = initialTangent [0][0] [0][0] ; tangent_matrix(1,1) = initialTangent [1][1] [1][1] ; tangent_matrix(2,2) = initialTangent [0][1] [0][1] ; tangent_matrix(0,1) = initialTangent [0][0] [1][1] ; tangent_matrix(1,0) = initialTangent [1][1] [0][0] ; tangent_matrix(0,2) = initialTangent [0][0] [0][1] ; tangent_matrix(2,0) = initialTangent [0][1] [0][0] ; tangent_matrix(1,2) = initialTangent [1][1] [0][1] ; tangent_matrix(2,1) = initialTangent [0][1] [1][1] ; return tangent_matrix ; } //this is mike's problem int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrain(const Tensor &v) { return -1 ; } int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrain(const Tensor &v, const Tensor &r) { return -1 ; } int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrainIncr(const Tensor &v) { return -1 ; } int MultiaxialCyclicPlasticityPlaneStrain :: setTrialStrainIncr(const Tensor &v, const Tensor &r) { return -1 ; } const Tensor& MultiaxialCyclicPlasticityPlaneStrain :: getTangentTensor( ) { return rank4 ; } /* int MultiaxialCyclicPlasticityPlaneStrain::commitState( ) { epsilon_p_n = epsilon_p_nplus1; xi_n = xi_nplus1; return 0; } int MultiaxialCyclicPlasticityPlaneStrain::revertToLastCommit( ) { return 0; } int MultiaxialCyclicPlasticityPlaneStrain::revertToStart( ) { this->zero( ) ; return 0; } int MultiaxialCyclicPlasticityPlaneStrain::sendSelf (int commitTag, Channel &theChannel) { return -1; } int MultiaxialCyclicPlasticityPlaneStrain::recvSelf (int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker) { return -1; } */ Generated on Mon Oct 23 15:05:13 2006 for OpenSees by  1.5.0

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