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pair_smd_tlsph.h
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pair_smd_tlsph.h
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/* -*- c++ -*- ----------------------------------------------------------
*
* *** Smooth Mach Dynamics ***
*
* This file is part of the USER-SMD package for LAMMPS.
* Copyright (2014) Georg C. Ganzenmueller, georg.ganzenmueller@emi.fhg.de
* Fraunhofer Ernst-Mach Institute for High-Speed Dynamics, EMI,
* Eckerstrasse 4, D-79104 Freiburg i.Br, Germany.
*
* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#ifdef PAIR_CLASS
PairStyle(smd/tlsph,PairTlsph)
#else
#ifndef LMP_TLSPH_NEW_H
#define LMP_TLSPH_NEW_H
#include "pair.h"
#include <Eigen/Eigen>
namespace LAMMPS_NS {
class PairTlsph: public Pair {
public:
PairTlsph(class LAMMPS *);
virtual ~PairTlsph();
virtual void compute(int, int);
void settings(int, char **);
void coeff(int, char **);
double init_one(int, int);
void init_style();
void init_list(int, class NeighList *);
void write_restart_settings(FILE *) {
}
void read_restart_settings(FILE *) {
}
virtual double memory_usage();
void compute_shape_matrix(void);
void material_model(void);
void *extract(const char *, int &);
int pack_forward_comm(int, int *, double *, int, int *);
void unpack_forward_comm(int, int, double *);
void AssembleStress();
void PreCompute();
void ComputeForces(int eflag, int vflag);
void effective_longitudinal_modulus(const int itype, const double dt, const double d_iso, const double p_rate,
const Eigen::Matrix3d d_dev, const Eigen::Matrix3d sigma_dev_rate, const double damage, double &K_eff, double &mu_eff, double &M_eff);
void ComputePressure(const int i, const double rho, const double mass_specific_energy, const double vol_specific_energy,
const double pInitial, const double d_iso, double &pFinal, double &p_rate);
void ComputeStressDeviator(const int i, const Eigen::Matrix3d sigmaInitial_dev, const Eigen::Matrix3d d_dev, Eigen::Matrix3d &sigmaFinal_dev,
Eigen::Matrix3d &sigma_dev_rate, double &plastic_strain_increment);
void ComputeDamage(const int i, const Eigen::Matrix3d strain, const Eigen::Matrix3d sigmaFinal, Eigen::Matrix3d &sigma_damaged);
protected:
void allocate();
char *suffix;
/*
* per-type arrays
*/
int *strengthModel, *eos;
double *onerad_dynamic, *onerad_frozen, *maxrad_dynamic, *maxrad_frozen;
/*
* per atom arrays
*/
Eigen::Matrix3d *K, *PK1, *Fdot, *Fincr;
Eigen::Matrix3d *R; // rotation matrix
Eigen::Matrix3d *FincrInv;
Eigen::Matrix3d *D, *W; // strain rate and spin tensor
Eigen::Vector3d *smoothVelDifference;
Eigen::Matrix3d *CauchyStress;
double *detF, *particle_dt;
double *hourglass_error;
int *numNeighsRefConfig;
int nmax; // max number of atoms on this proc
double hMin; // minimum kernel radius for two particles
double dtCFL;
double dtRelative; // relative velocity of two particles, divided by sound speed
int updateFlag;
double update_threshold; // updateFlage is set to one if the relative displacement of a pair exceeds update_threshold
double cut_comm;
enum {
UPDATE_NONE = 5000, UPDATE_CONSTANT_THRESHOLD = 5001, UPDATE_PAIRWISE_RATIO = 5002,
};
enum {
LINEAR_DEFGRAD = 0,
STRENGTH_LINEAR = 1,
STRENGTH_LINEAR_PLASTIC = 2,
STRENGTH_JOHNSON_COOK = 3,
STRENGTH_NONE = 4,
EOS_LINEAR = 5,
EOS_SHOCK = 6,
EOS_POLYNOMIAL = 7,
EOS_NONE = 8,
REFERENCE_DENSITY = 9,
YOUNGS_MODULUS = 10,
POISSON_RATIO = 11,
HOURGLASS_CONTROL_AMPLITUDE = 12,
HEAT_CAPACITY = 13,
LAME_LAMBDA = 14,
SHEAR_MODULUS = 15,
M_MODULUS = 16,
SIGNAL_VELOCITY = 17,
BULK_MODULUS = 18,
VISCOSITY_Q1 = 19,
VISCOSITY_Q2 = 20,
YIELD_STRESS = 21,
FAILURE_MAX_PLASTIC_STRAIN_THRESHOLD = 22,
JC_A = 23,
JC_B = 24,
JC_a = 25,
JC_C = 26,
JC_epdot0 = 27,
JC_T0 = 28,
JC_Tmelt = 29,
JC_M = 30,
EOS_SHOCK_C0 = 31,
EOS_SHOCK_S = 32,
EOS_SHOCK_GAMMA = 33,
HARDENING_PARAMETER = 34,
FAILURE_MAX_PRINCIPAL_STRAIN_THRESHOLD = 35,
FAILURE_MAX_PRINCIPAL_STRESS_THRESHOLD = 36,
FAILURE_MAX_PAIRWISE_STRAIN_THRESHOLD = 37,
EOS_POLYNOMIAL_C0 = 38,
EOS_POLYNOMIAL_C1 = 39,
EOS_POLYNOMIAL_C2 = 40,
EOS_POLYNOMIAL_C3 = 41,
EOS_POLYNOMIAL_C4 = 42,
EOS_POLYNOMIAL_C5 = 43,
EOS_POLYNOMIAL_C6 = 44,
FAILURE_JC_D1 = 45,
FAILURE_JC_D2 = 46,
FAILURE_JC_D3 = 47,
FAILURE_JC_D4 = 48,
FAILURE_JC_EPDOT0 = 49,
CRITICAL_ENERGY_RELEASE_RATE = 50,
MAX_KEY_VALUE = 51
};
struct failure_types { // this is defined per type and determines which failure/damage model is active
bool failure_none;
bool failure_max_principal_strain;
bool failure_max_principal_stress;
bool failure_max_plastic_strain;
bool failure_johnson_cook;
bool failure_max_pairwise_strain;
bool integration_point_wise; // true if failure model applies to stress/strain state of integration point
bool failure_energy_release_rate;
failure_types() {
failure_none = true;
failure_max_principal_strain = false;
failure_max_principal_stress = false;
failure_max_plastic_strain = false;
failure_johnson_cook = false;
failure_max_pairwise_strain = false;
integration_point_wise = false;
failure_energy_release_rate = false;
//printf("constructed failure type\n");
}
};
failure_types *failureModel;
int ifix_tlsph;
int update_method;
class FixSMD_TLSPH_ReferenceConfiguration *fix_tlsph_reference_configuration;
private:
double **Lookup; // holds per-type material parameters for the quantities defined in enum statement above.
bool first; // if first is true, do not perform any computations, beacuse reference configuration is not ready yet.
};
}
#endif
#endif
/*
* materialCoeffs array for EOS parameters:
* 1: rho0
*
*
* materialCoeffs array for strength parameters:
*
* Common
* 10: maximum strain threshold for damage model
* 11: maximum stress threshold for damage model
*
* Linear Plasticity model:
* 12: plastic yield stress
*
*
* Blei: rho = 11.34e-6, c0=2000, s=1.46, Gamma=2.77
* Stahl 1403: rho = 7.86e-3, c=4569, s=1.49, Gamma=2.17
*/

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