dev_fab = 4.*(fab-trace(fab)/dim*kronecker(prob.getDomain()))
anis = sqrt(.5*inner(dev_fab,dev_fab))
# set anis to -1 if no contact
for i in range(numg):
if math.isnan(anis.getTupleForDataPoint(i)[0]): anis.setValueOfDataPoint(i,-1)
# get local rotation
rot = prob.getLocalAvgRotation(); rot = proj(rot)
# get local shear strain
strain = prob.getCurrentStrain()
volume_strain = trace(strain)
dev_strain = symmetric(strain) - volume_strain*kronecker(prob.getDomain())/dim
shear = sqrt(2*inner(dev_strain,dev_strain)); shear = proj(shear)
# export FE scene
saveVTK(vtkDir+"/ms"+mshName+"FE_%d.vtu"%t,u=u,sig=sig,shear=shear,e=vR,rot=rot,anis=anis)
# export DE scenes
prob.VTKExporter(vtkDir=vtkDir+"/ms"+mshName+"DE",t=t)
# export local responses at Gauss points
saveGauss2D(gaussDir+"/time_"+str(t)+".dat",strain=strain,stress=stress,fab=fab)
print "stress ratio at the bottom: %e"%(forceBot[0]/forceBot[1])
# next iteration
print "Step NO.%d finished, current kinetic energy: %2.1e"%(t,Ek)
t += 1
prob.getCurrentPacking(pos=(),time=t,prefix=packDir)
time_elapse = time.time() - time_start
fout.write("#Elapsed time in hours: "+str(time_elapse/3600.)+'\n')
fout.close()
prob.exitSimulation()
disp += du
stress=prob.getCurrentStress()
dom = prob.getDomain() # domain updated (Lagrangian)
proj = Projector(dom)
sig = proj(stress)
sig_bounda = interpolate(sig,FunctionOnBoundary(dom))
traction = matrix_mult(sig_bounda,dom.getNormal())
tractFoot = traction*footingBase
forceFoot = integrate(tractFoot,where=FunctionOnBoundary(dom))
lengthFoot = integrate(footingBase,where=FunctionOnBoundary(dom))
fout.write(str(t*vel)+' '+str(forceFoot[0])+' '+str(forceFoot[1])+' '+str(lengthFoot)+'\n')
vR=prob.getLocalVoidRatio()
rotation=prob.getLocalAvgRotation()
fabric=prob.getLocalFabric()
strain = prob.getCurrentStrain()
saveGauss2D(name='./result/gauss/time_'+str(t)+'.dat',strain=strain,stress=stress,fabric=fabric)
volume_strain = trace(strain)
dev_strain = symmetric(strain) - volume_strain*k/dim
shear = sqrt(2*inner(dev_strain,dev_strain))
saveVTK("./result/vtk/footing_%d.vtu"%t,disp=disp,stress=stress,shear=shear,e=vR,rot=rotation)
prob.getCurrentPacking(pos=packNo,time=t,prefix='./result/packing/') # output packing
time_elapse = time.time() - time_start
fout.write("#Elapsed time in hours: "+str(time_elapse/3600.)+'\n')
fout.close()
prob.exitSimulation()
du = prob.solve(iter_max=100) # get solution: nodal displacement
disp += du
stress = prob.getCurrentStress()
dom = prob.getDomain() # domain is updated Lagrangian formulation
proj = Projector(dom)
sig = proj(stress)
sig_bounda = interpolate(sig, FunctionOnBoundary(dom))
traction = matrix_mult(sig_bounda, dom.getNormal())
tractTop = traction * topSurf
forceTop = integrate(tractTop, where=FunctionOnBoundary(dom))
lengthTop = integrate(topSurf, where=FunctionOnBoundary(dom))
fout.write(str(t * vel / ly) + " " + str(forceTop[1]) + " " + str(lengthTop) + "\n")
vR = prob.getLocalVoidRatio()
fabric = prob.getLocalFabric()
strain = prob.getCurrentStrain()
saveGauss2D(name="./result/gauss/time_" + str(t) + ".dat", strain=strain, stress=stress, fabric=fabric)
volume_strain = trace(strain)
dev_strain = symmetric(strain) - volume_strain * k / dim
shear = sqrt(2 * inner(dev_strain, dev_strain))
saveVTK("./result/vtk/biaxialSmooth_%d.vtu" % t, disp=disp, shear=shear, e=vR)
prob.getCurrentPacking(pos=(), time=t, prefix="./result/packing/")
time_elapse = time.time() - time_start
fout.write("#Elapsed time in hours: " + str(time_elapse / 3600.0) + "\n")
fout.close()
prob.exitSimulation()