TEST_F(PD_SOLVER_FIXTURE, TEST_ADR_BUNNY)
{
using namespace std;
using namespace arma;
double dt = 1.0;
int nSteps = 10;
int dim = 3;
int saveFreq = 10;
double vMag = -1e-11;
double s0 = 0.00158377370467;
double rho = 2140.0;
double alpha = 0.25;
double delta = 0.018*2;
double gridspacing = 1.1*delta;
double E = 15200000000.0;
double nu = 1./3.;
double k = E/(2.*(1. - nu));
double micromodulus = k;
double error = 1e-4;
double G0 = 0.1; // Fracture energy release rate
vector<string> saveParameters = {"id", "x", "y", "z", "potential_energy", "kinetic_energy", "stress", "damage"};
//--------------------------------------------------------------------------
// Initialization
//--------------------------------------------------------------------------
PD_Particles particles;
particles = load_pd(geometries[1]);
particles.initializeADR();
particles.registerParameter("rho", rho);
particles.registerParameter("micromodulus", micromodulus);
particles.registerParameter("s0", s0);
particles.registerParameter("radius", s0);
vector<pair<double,double>> boundaries;
// Bunny - geometry[1]
pair<double,double> x_limits(0., 1.);
pair<double,double> y_limits(0., 0.9);
pair<double,double> z_limits(0., 1.);
boundaries = {x_limits, y_limits, z_limits};
Grid grid(boundaries, gridspacing);
grid.initialize();
grid.placeParticlesInGrid(particles);
setPdConnections(particles, grid, delta, gridspacing);
reCalculatePdMicromodulus(particles, dim);
reCalculatePdFractureCriterion(particles, G0, delta);
calculateRadius(particles, 3);
//--------------------------------------------------------------------------
// Setting the initial position
//--------------------------------------------------------------------------
mat &r0 = particles.r0();
mat &r = particles.r();
for(int i=0; i<particles.nParticles(); i++)
{
for(int d=0; d<3; d++)
{
r0(d, i) = r(d,i);
}
}
//--------------------------------------------------------------------------
// Setting the Forces
//--------------------------------------------------------------------------
Force * pdForce = new PD_bondForce(particles);
Force * contactForce = new ContactForce(particles, grid, delta/1.21);
Modifier *fracture= new PmbFracture(alpha);
fracture->setParticles(particles);
//--------------------------------------------------------------------------
// Setting the boundary conditions
//--------------------------------------------------------------------------
double d = 1.3;
pair<double, double> bound1(x_limits.first - d*delta, x_limits.first + d*delta);
Modifier *boundaryLeft= new MoveParticles(-vMag, 0, bound1, 0, 1, 0);
boundaryLeft->setParticles(particles);
pair<double, double> bound2(x_limits.second - 2*d*delta, x_limits.second + d*delta);
Modifier *boundaryRight = new MoveParticles(vMag, 0, bound2, 0, 1, 0);
boundaryRight->setParticles(particles);
boundaryLeft->initialize();
boundaryRight->initialize();
fracture->initialize();
//--------------------------------------------------------------------------
// Setting the integrator
//--------------------------------------------------------------------------
Solver *solver = new ADR();
solver->setErrorThreshold(error);
solver->setMainGrid(grid);
solver->setParticles(particles);
solver->addForce(pdForce);
solver->addForce(contactForce);
solver->setDt(dt);
solver->setSteps(nSteps);
solver->setSaveInterval(saveFreq);
solver->setSaveParameters(saveParameters);
solver->addModifier(boundaryLeft);
solver->addModifier(boundaryRight);
solver->addSpModifier(fracture);
solver->solve();
delete solver;
delete pdForce;
delete boundaryLeft;
delete boundaryRight;
}
TEST_F(PD_SOLVER_FIXTURE, TEST_INTEGRATOR)
{
using namespace std;
using namespace arma;
// double dt = 5000.65212887624e-10;
double dt = 1.65212887624e-10/30.;
int nSteps = 150;
nSteps = 10;
int dim = 3;
int saveFreq = 1500;
double vMag = -0.5;
// double s0 = 0.0158377370467;
double s0 = 0.00158377370467;
double rho = 8140.0;
double alpha = 0.25;
double delta = 3.66216165e-06;
double gridspacing = 1.1*delta;
double h = 1.25e-05;
double E = 15200000000.0;
double nu = 1./3.;
double k = E/(2.*(1. - nu));
double micromodulus = 12.*k/(M_PI*h*pow(delta, 3));
micromodulus = k;
vector<string> saveParameters = {"id", "x", "y", "stress", "damage"};
//--------------------------------------------------------------------------
// Initialization
//--------------------------------------------------------------------------
PD_Particles particles;
particles = load_pd(geometries[8]);
particles.registerParameter("rho", rho);
particles.registerParameter("micromodulus", micromodulus);
particles.registerParameter("s0", s0);
particles.registerParameter("radius", s0);
vector<pair<double,double>> boundaries;
// Hole - geometry[4]
// pair<double,double> x_limits(0., 0.0487619);
// pair<double,double> y_limits(0., 0.0488042);
// pair<double,double> z_limits(0., 0.001);
// double gridspacing = 0.0022*3;;
// double radius = 0.95*gridspacing;
// // Bunny - geometry[1]
// pair<double,double> x_limits(0., 1.);
// pair<double,double> y_limits(0., 0.9);
// pair<double,double> z_limits(0., 1.);
// double gridspacing = 0.018*2;
// double radius = 0.95*gridspacing;
// Bunny - geometry[1]
pair<double,double> x_limits(0., 5e-05);
pair<double,double> y_limits(0., 5e-05);
pair<double,double> z_limits(-0.5*h, 0.5*h);
boundaries = {x_limits, y_limits, z_limits};
Grid grid(boundaries, gridspacing);
grid.initialize();
grid.placeParticlesInGrid(particles);
setPdConnections(particles, grid, delta, gridspacing);
reCalculatePdMicromodulus(particles, dim);
calculateRadius(particles, 2, h);
//--------------------------------------------------------------------------
// Setting the Forces
//--------------------------------------------------------------------------
Force * pdForce = new PD_bondForce(particles);
Force * contactForce = new ContactForce(particles, grid, delta/3.01);
Modifier *fracture= new PmbFracture(alpha);
fracture->setParticles(particles);
//--------------------------------------------------------------------------
// Setting the boundary conditions
//--------------------------------------------------------------------------
double d = 0.4;
pair<double, double> bound1(x_limits.first - d*delta, x_limits.first + d*delta);
Modifier *boundaryLeft= new VelocityBoundary(-vMag, 0, bound1, 0, 500, 1, 0);
boundaryLeft->setParticles(particles);
pair<double, double> bound2(x_limits.second - d*delta, x_limits.second + d*delta);
Modifier *boundaryRight = new VelocityBoundary(vMag, 0, bound2, 0, 500, 1, 0);
boundaryRight->setParticles(particles);
boundaryLeft->initialize();
boundaryRight->initialize();
double d_tb = 0.2;
pair<double, double> boundTop(y_limits.first - d_tb*delta, y_limits.first + d_tb*delta);
Modifier *boundaryTop = new VelocityBoundary(0, 1, boundTop, 1, 1, 1, 0);
boundaryTop->setParticles(particles);
pair<double, double> boundBottom(y_limits.second - d_tb*delta, y_limits.second + d_tb*delta);
Modifier *boundaryBottom = new VelocityBoundary(0, 1, boundBottom, 1, 1, 1, 0);
boundaryBottom->setParticles(particles);
boundaryTop->initialize();
boundaryBottom->initialize();
fracture->initialize();
//--------------------------------------------------------------------------
// Setting the integrator
//--------------------------------------------------------------------------
Solver *solver = new VelocityVerletIntegrator();
solver->setMainGrid(grid);
solver->setParticles(particles);
solver->addForce(pdForce);
solver->addForce(contactForce);
solver->setDt(dt);
solver->setSteps(nSteps);
solver->setSaveInterval(saveFreq);
solver->setSaveParameters(saveParameters);
solver->addModifier(boundaryLeft);
solver->addModifier(boundaryRight);
solver->addModifier(boundaryTop);
solver->addModifier(boundaryBottom);
solver->addSpModifier(fracture);
solver->solve();
delete solver;
delete pdForce;
delete boundaryLeft;
delete boundaryRight;
delete fracture;
}
