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using central (and tested) functionality

This commit is contained in:
Martin Diehl 2019-12-21 18:17:04 +01:00
parent 2cd2d6f506
commit da33ba17bc
1 changed files with 4 additions and 60 deletions
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64
processing/post/addCompatibilityMismatch.py
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@ -13,58 +13,6 @@ import damask
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName,damask.version])
#--------------------------------------------------------------------------------------------------
def deformationAvgFFT(F,grid,size,nodal=False,transformed=False):
"""Calculate average cell center (or nodal) deformation for deformation gradient field specified in each grid cell"""
if nodal:
x, y, z = np.meshgrid(np.linspace(0,size[2],1+grid[2]),
np.linspace(0,size[1],1+grid[1]),
np.linspace(0,size[0],1+grid[0]),
indexing = 'ij')
else:
x, y, z = np.meshgrid(np.linspace(size[2]/grid[2]/2.,size[2]-size[2]/grid[2]/2.,grid[2]),
np.linspace(size[1]/grid[1]/2.,size[1]-size[1]/grid[1]/2.,grid[1]),
np.linspace(size[0]/grid[0]/2.,size[0]-size[0]/grid[0]/2.,grid[0]),
indexing = 'ij')
origCoords = np.concatenate((z[:,:,:,None],y[:,:,:,None],x[:,:,:,None]),axis = 3)
F_fourier = F if transformed else np.fft.rfftn(F,axes=(0,1,2)) # transform or use provided data
Favg = np.real(F_fourier[0,0,0,:,:])/grid.prod() # take zero freq for average
avgDeformation = np.einsum('ml,ijkl->ijkm',Favg,origCoords) # dX = Favg.X
return avgDeformation
#--------------------------------------------------------------------------------------------------
def displacementFluctFFT(F,grid,size,nodal=False,transformed=False):
"""Calculate cell center (or nodal) displacement for deformation gradient field specified in each grid cell"""
integrator = 0.5j * size / math.pi
kk, kj, ki = np.meshgrid(np.where(np.arange(grid[2])>grid[2]//2,np.arange(grid[2])-grid[2],np.arange(grid[2])),
np.where(np.arange(grid[1])>grid[1]//2,np.arange(grid[1])-grid[1],np.arange(grid[1])),
np.arange(grid[0]//2+1),
indexing = 'ij')
k_s = np.concatenate((ki[:,:,:,None],kj[:,:,:,None],kk[:,:,:,None]),axis = 3)
k_sSquared = np.einsum('...l,...l',k_s,k_s)
k_sSquared[0,0,0] = 1.0 # ignore global average frequency
#--------------------------------------------------------------------------------------------------
# integration in Fourier space
displacement_fourier = -np.einsum('ijkml,ijkl,l->ijkm',
F if transformed else np.fft.rfftn(F,axes=(0,1,2)),
k_s,
integrator,
) / k_sSquared[...,np.newaxis]
#--------------------------------------------------------------------------------------------------
# backtransformation to real space
displacement = np.fft.irfftn(displacement_fourier,grid[::-1],axes=(0,1,2))
return damask.grid_filters.cell_2_node(displacement) if nodal else displacement
def volTetrahedron(coords):
"""
Return the volume of the tetrahedron with given vertices or sides.
@ -230,15 +178,11 @@ for name in filenames:
table = damask.Table.from_ASCII(StringIO(''.join(sys.stdin.read())) if name is None else name)
grid,size,origin = damask.grid_filters.cell_coord0_2_DNA(table.get(options.pos))
N = grid.prod()
F_fourier = np.fft.rfftn(table.get(options.defgrad).reshape(grid[2],grid[1],grid[0],3,3),axes=(0,1,2)) # perform transform only once...
nodes = displacementFluctFFT(F_fourier,grid,size,True,transformed=True)\
+ deformationAvgFFT (F_fourier,grid,size,True,transformed=True)
F = table.get(options.defgrad).reshape(grid[2],grid[1],grid[0],3,3)
nodes = damask.grid_filters.node_coord(size,F)
if options.shape:
centres = displacementFluctFFT(F_fourier,grid,size,False,transformed=True)\
+ deformationAvgFFT (F_fourier,grid,size,False,transformed=True)
centres = damask.grid_filters.cell_coord(size,F)
shapeMismatch = shapeMismatch( size,table.get(options.defgrad).reshape(grid[2],grid[1],grid[0],3,3),nodes,centres)
table.add('shapeMismatch(({}))'.format(options.defgrad),
shapeMismatch.reshape((-1,1)),