def setUp(self):
self.fets_eval = FETS1D2L(mats_eval = MATS1DElastic(E=10.))
# Discretization
self.fe_domain1 = FEGrid( coord_max = (3.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.fe_domain2 = FEGrid( coord_min = (3.,0.,0.),
coord_max = (6.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.fe_domain3 = FEGrid( coord_min = (3.,0.,0.),
coord_max = (6.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.ts = TS( dof_resultants = True,
sdomain = [ self.fe_domain1, self.fe_domain2 , self.fe_domain3 ],
bcond_list = [BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 4, link_dofs = [3], link_coeffs = [1.],
value = 0. ),
BCDof(var='f', dof = 7, value = 1,
link_dofs = [2], link_coeffs = [2] ) ],
rtrace_list = [ RTraceGraph(name = 'Fi,right over u_right (iteration)' ,
var_y = 'F_int', idx_y = 0,
var_x = 'U_k', idx_x = 1),
]
)
# Add the time-loop control
self.tloop = TLoop( tstepper = self.ts,
tline = TLine( min = 0.0, step = 1, max = 1.0 ))
def _get_fe_domain_structure(self):
'''Root of the domain hierarchy
'''
elem_length = self.length / float(self.shape)
fe_domain = FEDomain()
fe_m_level = FERefinementGrid(name='matrix domain',
domain=fe_domain,
fets_eval=self.fets_m)
fe_grid_m = FEGrid(name='matrix grid',
coord_max=(self.length, ),
shape=(self.shape, ),
level=fe_m_level,
fets_eval=self.fets_m,
geo_transform=self.geo_transform)
fe_fb_level = FERefinementGrid(name='fiber bond domain',
domain=fe_domain,
fets_eval=self.fets_fb)
fe_grid_fb = FEGrid(coord_min=(0., length / 5.),
coord_max=(length, 0.),
shape=(self.shape, 1),
level=fe_fb_level,
fets_eval=self.fets_fb,
geo_transform=self.geo_transform)
return fe_domain, fe_grid_m, fe_grid_fb, fe_m_level, fe_fb_level
def test_bar2():
'''Clamped bar composed of two linked bars loaded at the right end
[00]-[01]-[02]-[03]-[04]-[05]-[06]-[07]-[08]-[09]-[10]
[11]-[12]-[13]-[14]-[15]-[16]-[17]-[18]-[19]-[20]-[21]
u[0] = 0, u[5] = u[16], R[-1] = R[21] = 10
'''
fets_eval = FETS1D2L(mats_eval=MATS1DElastic(E=10., A=1.))
# Discretization
fe_domain1 = FEGrid(coord_max=(10., 0., 0.),
shape=(10, ),
n_nodal_dofs=1,
dof_r=fets_eval.dof_r,
geo_r=fets_eval.geo_r)
fe_domain2 = FEGrid(coord_min=(10., 0., 0.),
coord_max=(20., 0., 0.),
shape=(10, ),
n_nodal_dofs=1,
dof_r=fets_eval.dof_r,
geo_r=fets_eval.geo_r)
ts = TS(iterms=[(fets_eval, fe_domain1), (fets_eval, fe_domain2)],
dof_resultants=True,
bcond_list=[
BCDof(var='u', dof=0, value=0.),
BCDof(var='u',
dof=5,
link_dofs=[16],
link_coeffs=[1.],
value=0.),
BCDof(var='f', dof=21, value=10)
],
rtrace_list=[
RTraceGraph(name='Fi,right over u_right (iteration)',
var_y='F_int',
idx_y=0,
var_x='U_k',
idx_x=1),
])
# Add the time-loop control
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=1, max=1.0))
u = tloop.eval()
print 'u', u
#
# '---------------------------------------------------------------'
# 'Clamped bar composed of two linked bars control displ at right'
# 'u[0] = 0, u[5] = u[16], u[21] = 1'
# Remove the load and put a unit displacement at the right end
# Note, the load is irrelevant in this case and will be rewritten
#
ts.bcond_list = [
BCDof(var='u', dof=0, value=0.),
BCDof(var='u', dof=5, link_dofs=[16], link_coeffs=[1.], value=0.),
BCDof(var='u', dof=21, value=1.)
]
# system solver
u = tloop.eval()
print 'u', u
def _get_fe_grid_column(self):
return FEGrid(coord_min=(0.0, 0.0, 0.0),
coord_max=(1.0, 1.0, 1.0),
geo_transform=self.column,
shape=(self.n_elems_col_xy, self.n_elems_col_xy,
self.n_elems_col_z),
fets_eval=self.fe_column)
def _get_fe_grid_roof(self):
return FEGrid(coord_min=(0.0, 0.0, 0.0),
coord_max=(1.0, 1.0, 1.0),
geo_transform=self.hp_shell,
shift_array=self.shift_array,
shape=(self.n_elems_xy, self.n_elems_xy, self.n_elems_z),
fets_eval=self.fe_roof)
def _get_fe_disk_grid(self):
fe_grid = FEGrid(coord_min=(-1, -1),
coord_max=(1, 1),
geo_transform=self.geo_disk,
shape=(self.n_elems, self.n_elems),
fets_eval=self.fets_disk)
return fe_grid
def example_with_new_domain():
from ibvpy.api import \
TStepper as TS, RTDofGraph, RTraceDomainListField, TLoop, \
TLine, BCDof, IBVPSolve as IS, DOTSEval
from ibvpy.mats.mats1D.mats1D_elastic.mats1D_elastic import MATS1DElastic
fets_eval = FETS1D2L3U(mats_eval=MATS1DElastic(E=10.))
from ibvpy.mesh.fe_grid import FEGrid
# Discretization
domain = FEGrid(coord_max=(3., ),
shape=(3, ),
fets_eval=fets_eval)
ts = TS(dof_resultants=True,
sdomain=domain,
# conversion to list (square brackets) is only necessary for slicing of
# single dofs, e.g "get_left_dofs()[0,1]"
# bcond_list = [ BCDof(var='u', dof = 0, value = 0.) ] +
# [ BCDof(var='u', dof = 2, value = 0.001 ) ]+
# [ ) ],
bcond_list=[BCDof(var='u', dof=0, value=0.),
# BCDof(var='u', dof = 1, link_dofs = [2], link_coeffs = [0.5],
# value = 0. ),
# BCDof(var='u', dof = 2, link_dofs = [3], link_coeffs = [1.],
# value = 0. ),
BCDof(var='f', dof=6, value=1,
# link_dofs = [2], link_coeffs = [2]
)],
rtrace_list=[RTDofGraph(name='Fi,right over u_right (iteration)',
var_y='F_int', idx_y=0,
var_x='U_k', idx_x=1),
RTraceDomainListField(name='Stress',
var='sig_app', idx=0),
RTraceDomainListField(name='Displacement',
var='u', idx=0),
RTraceDomainListField(name='N0',
var='N_mtx', idx=0,
record_on='update')
]
)
# Add the time-loop control
tloop = TLoop(tstepper=ts,
tline=TLine(min=0.0, step=1, max=1.0))
print('---- result ----')
print(tloop.eval())
print(ts.F_int)
print(ts.rtrace_list[0].trace.ydata)
# Put the whole stuff into the simulation-framework to map the
# individual pieces of definition into the user interface.
#
from ibvpy.plugins.ibvpy_app import IBVPyApp
app = IBVPyApp(ibv_resource=tloop)
app.main()
def _get_fe_grid_columns(self):
return [
FEGrid(coord_min=(0.0, 0.0, 0.0),
coord_max=(1.0, 1.0, 1.0),
geo_transform=column,
shape=(1, 1, 1),
fets_eval=self.fe_column) for column in self.columns
]
def _get_specmn_fe_grid(self):
fe_grid = FEGrid(coord_max=(1, 1, 1),
shape=(self.shape_x, self.shape_y, self.shape_z),
level=self.specmn_fe_level,
geo_transform=self.barel_shell_geo,
fets_eval=self.specmn_fets)
return fe_grid
def setUp(self):
'''
Construct the FEDomain with two FERefinementGrids (2,2)
'''
self.domain1 = FEDomain()
self.fets_eval = FETS2D4Q(mats_eval=MATS2DElastic())
self.d1 = FERefinementGrid(name='d1', domain=self.domain1)
g1 = FEGrid(coord_max=(1., 1., 0.),
shape=(2, 2),
fets_eval=self.fets_eval,
level=self.d1)
self.d2 = FERefinementGrid(name='d2', domain=self.domain1)
g2 = FEGrid(coord_min=(1., 0., 0.),
coord_max=(2., 1., 0.),
shape=(2, 2),
fets_eval=self.fets_eval,
level=self.d2)
def _get_buttstrap_clamp_fe_grid(self):
fe_grid = FEGrid(coord_min=(0, 0),
coord_max=(1, 1),
level=self.buttstrap_clamp_fe_level,
geo_transform=self.buttstrap_clamp_geo,
shape=(1, self.buttstrap_ne_y),
fets_eval=self.buttstrap_fets)
return fe_grid
def _get_friction_fe_grid(self):
fe_grid = FEGrid(coord_min=(0, 0),
coord_max=(1, 1),
level=self.friction_fe_level,
geo_transform=self.friction_geo,
shape=(self.friction_ne_x, self.friction_ne_y),
fets_eval=self.friction_fets)
return fe_grid
def setUp(self):
'''
Construct the FEDomain with one FERefinementGrids (2,2)
'''
self.fets_eval = FETS3D8H()
self.grid = FEGrid(coord_max=(1., 1., 1.),
shape=(1, 1, 1),
fets_eval=self.fets_eval)
def _get_domain(self):
# Number of elements
n_e_x = 20
# Element definition
domain = FEGrid(coord_max=(self.L_x, ),
shape=(n_e_x, ),
fets_eval=self.fets_eval)
return domain
def _get_specmn_fe_grid(self):
# only a quarter of the beam is simulated due to symmetry:
fe_grid = FEGrid(coord_min=(self.sym_elstmr_length, 0., 0.),
coord_max=(self.sym_specmn_length, self.sym_width,
self.thickness),
shape=(self.shape_x, self.shape_y, self.shape_z),
level=self.specmn_fe_level,
fets_eval=self.specmn_fets)
return fe_grid
def notched_bended_beam():
fets_eval_4u = FETS2D4Q(mats_eval=MATS2DScalarDamage())
fets_eval_cracked = FETSLSEval(parent_fets=fets_eval_4u)
# Discretization
fe_domain1 = FEGrid(coord_max=(5., 2., 0.),
shape=(3, 2),
fets_eval=fets_eval_4u)
fe_child_domain = FERefinementGrid(parent_domain=fe_domain1,
fets_eval=fets_eval_cracked,
fine_cell_shape=(1, 1))
crack_level_set = lambda X: X[0] - 2.5
fe_child_domain.refine_elem((1, 0), crack_level_set)
dots = fe_child_domain.new_dots()
fe_domain = FEDomainList(subdomains=[fe_domain1])
fe_domain_tree = FEDomainTree(domain_list=fe_domain)
ts = TS(
dof_resultants=True,
sdomain=[fe_domain1, fe_child_domain],
bcond_list=[
BCDofGroup(var='u',
value=0.,
dims=[0, 1],
get_dof_method=fe_domain1.get_left_dofs),
BCDofGroup(var='u',
value=0.,
dims=[0, 1],
get_dof_method=fe_domain1.get_right_dofs),
BCDofGroup(var='f',
value=-1.,
dims=[1],
get_dof_method=fe_domain1.get_top_dofs),
],
rtrace_list=[
# RTDofGraph(name = 'Fi,right over u_right (iteration)' ,
# var_y = 'F_int', idx_y = 0,
# var_x = 'U_k', idx_x = 1),
# RTraceDomainListField(name = 'Stress' ,
# var = 'sig_app', idx = 0, warp = True ),
# RTraceDomainField(name = 'Displacement' ,
# var = 'u', idx = 0),
# RTraceDomainField(name = 'N0' ,
# var = 'N_mtx', idx = 0,
# record_on = 'update')
#
])
# Add the time-loop control
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=1, max=1.0))
print(tloop.eval())
def _get_fe_grid(self):
elem_length = self.length / float(self.shape)
fe_grid = FEGrid(coord_max=(self.length, ),
shape=(self.shape, ),
level=self.fe_grid_level,
fets_eval=self.fets)
return fe_grid
def _get_fe_grid_roofs(self):
return [
FEGrid(coord_min=(0.0, 0.0, 0.0),
coord_max=(1.0, 1.0, 1.0),
geo_transform=hp_shell,
shape=(self.n_elems_xy_quarter, self.n_elems_xy_quarter,
self.n_elems_z),
fets_eval=self.fe_roof) for hp_shell in self.hp_shells
]
def run_example():
from ibvpy.api import \
TStepper as TS, RTraceGraph, RTraceDomainListField, \
RTraceDomainListInteg, TLoop, \
TLine, BCDof, IBVPSolve as IS, DOTSEval
from ibvpy.mats.mats2D.mats2D_conduction.mats2D_conduction import MATS2DConduction
from ibvpy.api import BCDofGroup
fets_eval = FETS2D4Q4T(mats_eval=MATS2DConduction(k=1.))
print fets_eval.vtk_node_cell_data
from ibvpy.mesh.fe_grid import FEGrid
from ibvpy.mesh.fe_refinement_grid import FERefinementGrid
from ibvpy.mesh.fe_domain import FEDomain
from mathkit.mfn import MFnLineArray
# Discretization
fe_grid = FEGrid(coord_max=(1., 1., 0.), shape=(2, 2), fets_eval=fets_eval)
tstepper = TS(
sdomain=fe_grid,
bcond_list=[
BCDofGroup(var='u',
value=0.,
dims=[0],
get_dof_method=fe_grid.get_left_dofs),
# BCDofGroup( var='u', value = 0., dims = [1],
# get_dof_method = fe_grid.get_bottom_dofs ),
BCDofGroup(var='u',
value=.005,
dims=[0],
get_dof_method=fe_grid.get_top_right_dofs)
],
rtrace_list=[
# RTraceDomainListField(name = 'Damage' ,
# var = 'omega', idx = 0,
# record_on = 'update',
# warp = True),
# RTraceDomainListField(name = 'Displacement' ,
# var = 'u', idx = 0,
# record_on = 'update',
# warp = True),
# RTraceDomainListField(name = 'N0' ,
# var = 'N_mtx', idx = 0,
# record_on = 'update')
])
print tstepper.setup()
return
# Add the time-loop control
tloop = TLoop(tstepper=tstepper,
debug=False,
tline=TLine(min=0.0, step=1.0, max=1.0))
tloop.eval()
def _get_elstmr_fe_grid(self):
x_max = self.sym_elstmr_length
y_max = self.width / 2.
z_max = self.thickness + self.elstmr_thickness
fe_grid = FEGrid(coord_min=(0, 0, self.thickness),
coord_max=(x_max, y_max, z_max),
level=self.elstmr_fe_level,
shape=(self.mid_shape_x, self.shape_y, 1),
fets_eval=self.elstmr_fets)
return fe_grid
def _get_elstmr_fe_grid(self):
fe_grid = FEGrid(coord_min=(self.sym_mid_zone_specmn_length -
self.sym_elstmr_length, 0.,
self.thickness),
coord_max=(self.sym_mid_zone_specmn_length +
self.sym_elstmr_length, self.sym_width,
self.thickness + self.elstmr_thickness),
level=self.elstmr_fe_level,
shape=(self.load_zone_shape_x, self.shape_y, 1),
fets_eval=self.elstmr_fets)
return fe_grid
def _get_supprt_fe_grid(self):
return FEGrid(
coord_min=(0, 0, 0),
coord_max=(1, 1, 1),
level=self.supprt_fe_level,
# use shape (2,2) in order to place support in the center of the steel support
# corresponding to 4 elements of the slab mesh
#
shape=(self.shape_supprt_x, self.shape_supprt_x, 1),
geo_transform=self.geo_supprt,
fets_eval=self.supprt_fets)
def demo3d():
# Geometry
#
length = 1.0
from ibvpy.fets.fets3D import FETS3D8H, FETS3D8H20U, FETS3D8H27U, FETS3D8H20U
from ibvpy.mats.mats3D import MATS3DElastic
# Material and FE Formulation
#
lin_x_temperature = TemperatureLinFn(length=length, n_dims=3, offset=0.5)
fets_eval = FETS3D8H20U(mats_eval=MATS3DElastic(
E=30e3, nu=0.2, initial_strain=lin_x_temperature))
fets_eval.vtk_r *= 0.99
# Discretization
#
domain = FEGrid(coord_max=(length, length, length),
shape=(6, 3, 3),
fets_eval=fets_eval)
bcond_list = [
BCSlice(var='u',
dims=[0, 1, 2],
slice=domain[0, 0, 0, 0, 0, 0],
value=0),
BCSlice(var='u',
dims=[0, 1],
slice=domain[0, 0, -1, 0, 0, -1],
value=0),
BCSlice(var='u', dims=[0], slice=domain[0, -1, 0, 0, -1, 0], value=0),
]
rtrace_list = [
sig_trace, eps_trace, eps0_trace, eps1t_trace, max_p_sig_trace, u_trace
]
for rtrace in rtrace_list:
rtrace.position = 'int_pnts'
rtrace.warp = False
corner_dof = domain[-1, -1, -1, -1, -1, -1].dofs[0, 0, 2]
ts = TS(sdomain=domain, bcond_list=bcond_list, rtrace_list=rtrace_list)
# Time integration
#
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=3, max=1.0))
tloop.eval()
# Postprocessing
#
app = IBVPyApp(ibv_resource=tloop)
app.main()
def setUp(self):
self.fets_eval = FETS1D2L(mats_eval=MATS1DElastic(E=10.))
# Discretization
self.domain = FEGrid(coord_max=(10., 0., 0.),
shape=(1, ),
fets_eval=self.fets_eval)
self.ts = TS(sdomain=self.domain, dof_resultants=True)
self.tloop = TLoop(tstepper=self.ts,
tline=TLine(min=0.0, step=1, max=1.0))
def example_2d():
from ibvpy.mats.mats2D.mats2D_elastic.mats2D_elastic import MATS2DElastic
from ibvpy.fets.fets2D.fets2D4q import FETS2D4Q
fets_eval = FETS2D4Q(mats_eval=MATS2DElastic(E=2.1e5))
# Discretization
fe_domain1 = FEGrid(coord_max=(2., 5., 0.),
shape=(10, 10),
fets_eval=fets_eval)
fe_subgrid1 = FERefinementLevel(parent=fe_domain1,
fine_cell_shape=(1, 1))
print 'children'
print fe_domain1.children
fe_subgrid1.refine_elem((5, 5))
fe_subgrid1.refine_elem((6, 5))
fe_subgrid1.refine_elem((7, 5))
fe_subgrid1.refine_elem((8, 5))
fe_subgrid1.refine_elem((9, 5))
fe_domain = FEDomain(subdomains=[fe_domain1])
ts = TS(dof_resultants=True,
sdomain=fe_domain,
bcond_list=[BCDofGroup(var='f', value=0.1, dims=[0],
get_dof_method=fe_domain1.get_top_dofs),
BCDofGroup(var='u', value=0., dims=[0, 1],
get_dof_method=fe_domain1.get_bottom_dofs),
],
rtrace_list=[RTraceGraph(name='Fi,right over u_right (iteration)',
var_y='F_int', idx_y=0,
var_x='U_k', idx_x=1),
RTraceDomainListField(name='Stress',
var='sig_app', idx=0, warp=True),
# RTraceDomainField(name = 'Displacement' ,
# var = 'u', idx = 0),
# RTraceDomainField(name = 'N0' ,
# var = 'N_mtx', idx = 0,
# record_on = 'update')
]
)
# Add the time-loop control
tloop = TLoop(tstepper=ts,
tline=TLine(min=0.0, step=1, max=1.0))
#
print tloop.eval()
from ibvpy.plugins.ibvpy_app import IBVPyApp
ibvpy_app = IBVPyApp(ibv_resource=tloop)
ibvpy_app.main()
def _get_fe_grid_roof(self):
hp_shell = GeoHPShell(thickness = 0.6)
square_to_circle = GeoSquare2Circle(post_transform = hp_shell,
circle_radius = 0.15,
#Scircle_center = [4.0, 4.0, 0.0],
square_edge = 0.6)
fe_grid = FEGrid(coord_min = (-1.0, -1.0, 0.0),
coord_max = (1.0, 1.0, 1.0),
geo_transform = square_to_circle,
shape = (self.n_elems_xy, self.n_elems_xy, self.n_elems_z),
fets_eval = self.fe_roof)
mid_idx = self.mid_idx
idx_min, idx_max = self.idx_min, self.idx_max
print 'idx_min', idx_min
print 'idx_max', idx_max
interior_elems = fe_grid[ idx_min:idx_max, idx_min:idx_max, :, :, :, : ].elems
fe_grid.inactive_elems = list(interior_elems)
print 'elems', interior_elems
return fe_grid
def __demo__():
from ibvpy.api import \
TStepper as TS, RTDofGraph, RTraceDomainListField, TLoop, \
TLine, BCDof
from ibvpy.tmodel.mats1D.mats1D_elastic.mats1D_elastic import MATS1DElastic
fets_eval = FETS1D2L(mats_eval=MATS1DElastic(E=10.))
from ibvpy.mesh.fe_grid import FEGrid
# Discretization
domain = FEGrid(coord_max=(3., ), shape=(3, ), fets_eval=fets_eval)
ts = TS(dof_resultants=True,
sdomain=domain,
bcond_list=[
BCDof(var='u', dof=0, value=0.),
BCDof(
var='f',
dof=3,
value=1,
)
],
rtrace_list=[
RTDofGraph(name='Fi,right over u_right (iteration)',
var_y='F_int',
idx_y=0,
var_x='U_k',
idx_x=1),
RTraceDomainListField(name='Stress', var='sig_app', idx=0),
RTraceDomainListField(name='Displacement',
var='u',
idx=0,
warp=True),
RTraceDomainListField(name='N0',
var='N_mtx',
idx=0,
record_on='update')
])
# Add the time-loop control
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=0.5, max=1.0))
print('---- result ----')
print(tloop.eval())
print(ts.F_int)
print(ts.rtrace_list[0].trace.ydata)
# Put the whole stuff into the simulation-framework to map the
# individual pieces of definition into the user interface.
#
app = IBVPyApp(ibv_resource=tloop)
app.main()
def demo1d():
# Geometry
#
length = 1.0
# Material and FE Formulation
#
from ibvpy.fets.fets1D import FETS1D2L, FETS1D2L3U
from ibvpy.mats.mats1D import MATS1DElastic
mats_eval = MATS1DElastic(E=100.,
initial_strain=TemperatureLinFn(length=length,
n_dims=1,
offset=0.5))
fets_eval = FETS1D2L3U(mats_eval=mats_eval)
fets_eval.vtk_r *= 0.99
# Discretization
#
domain = FEGrid(coord_max=(length, 0., 0.),
n_elems=(10, ),
fets_eval=fets_eval)
bcond_list = [
BCSlice(var='u', dims=[0], slice=domain[0, 0], value=0),
#BCSlice( var = 'u', dims = [0], slice = domain[-1, -1], value = 0 )
]
ts = TS(sdomain=domain,
bcond_list=bcond_list,
rtrace_list=[sig_trace, eps_trace, eps0_trace, eps1t_trace])
# Time integration
#
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=1, max=1.0))
tloop.eval()
# Postprocessing
#
legend = []
plot_sig(eps_trace, 'eps', legend)
plot_sig(eps0_trace, 'eps0', legend)
plot_sig(eps1t_trace, 'eps1t', legend)
p.legend(legend)
p.show()
def demo2d():
# Geometry
#
length = 1.0
from ibvpy.fets.fets2D import FETS2D4Q, FETS2D4Q8U, FETS2D4Q12U
from ibvpy.mats.mats2D import MATS2DElastic
# Material and FE Formulation
#
lin_x_temperature = TemperatureLinFn(length=length, n_dims=2)
fets_eval = FETS2D4Q12U(mats_eval=MATS2DElastic(
E=30e5, nu=0.2, initial_strain=lin_x_temperature))
fets_eval.vtk_r *= 0.99
# Discretization
#
domain = FEGrid(coord_max=(length, length, 0.),
shape=(10, 10),
fets_eval=fets_eval)
bcond_list = [
BCSlice(var='u', dims=[0, 1], slice=domain[0, 0, 0, 0], value=0),
BCSlice(var='u', dims=[1], slice=domain[0, -1, 0, -1], value=0),
]
rtrace_list = [sig_trace, eps_trace, eps0_trace, eps1t_trace, u_trace]
ts = TS(
sdomain=domain,
bcond_list=bcond_list,
rtrace_list=rtrace_list,
)
# Time integration
#
tloop = TLoop(tstepper=ts, tline=TLine(min=0.0, step=1, max=1.0))
tloop.eval()
# Postprocessing
#
app = IBVPyApp(ibv_resource=tloop)
app.main()
def test_rg_addition(self):
'''Check numbering after addition of FERefinementGrid
Add another FERefinementGrid (2,2) as a child of grid 1
Check the n_dofs of FEDomain to verify the re-enumeration
Check the elem_dof_map of the grid 3.
'''
d3 = FERefinementGrid(name='d3', parent=self.d1)
g3 = FEGrid(coord_max=(1., 1., 0.),
shape=(2, 2),
fets_eval=self.fets_eval,
level=d3)
n_dofs = self.domain1.n_dofs
#check the n_dofs of the domain after addition
self.assertEqual(n_dofs, 54)
#check elem_dof_map of added subdomain
elem_dof_map = d3.elem_dof_map
edm = [
36, 37, 42, 43, 44, 45, 38, 39, 38, 39, 44, 45, 46, 47, 40, 41, 42,
43, 48, 49, 50, 51, 44, 45, 44, 45, 50, 51, 52, 53, 46, 47
]
for e_, e_ex_ in zip(elem_dof_map.flatten(), edm):
self.assertEqual(e_, e_ex_)
def setUp(self):
self.fets_eval = FETS1D2L(mats_eval=MATS1DElastic(E=10.))
# Discretization
self.fe_domain1 = FEGrid(coord_max=(3., 0., 0.),
shape=(3, ),
fets_eval=self.fets_eval)
self.fe_domain2 = FEGrid(coord_min=(3., 0., 0.),
coord_max=(6., 0., 0.),
shape=(3, ),
fets_eval=self.fets_eval)
self.fe_domain3 = FEGrid(coord_min=(3., 0., 0.),
coord_max=(6., 0., 0.),
shape=(3, ),
fets_eval=self.fets_eval)
self.ts = TS(
dof_resultants=True,
sdomain=[self.fe_domain1, self.fe_domain2, self.fe_domain3],
bcond_list=[
BCDof(var='u', dof=0, value=0.),
BCDof(var='u',
dof=4,
link_dofs=[3],
link_coeffs=[1.],
value=0.),
BCDof(var='f', dof=7, value=1, link_dofs=[2], link_coeffs=[2])
],
rtrace_list=[
RTraceGraph(name='Fi,right over u_right (iteration)',
var_y='F_int',
idx_y=0,
var_x='U_k',
idx_x=1),
])
# Add the time-loop control
self.tloop = TLoop(tstepper=self.ts,
tline=TLine(min=0.0, step=1, max=1.0))
from mathkit.matrix_la.coo_mtx import COOSparseMtx
from mathkit.matrix_la.dense_mtx import DenseMtx
import unittest
from ibvpy.api import TStepper as TS, RTraceGraph, RTraceDomainField, TLoop, TLine, BCDof, IBVPSolve as IS, DOTSEval
from ibvpy.mats.mats1D.mats1D_elastic.mats1D_elastic import MATS1DElastic
from ibvpy.mesh.fe_grid import FEGrid
from ibvpy.fets.fets1D.fets1D2l import FETS1D2L
if __name__ == "__main__":
fets_eval = FETS1D2L(mats_eval=MATS1DElastic(E=10.0))
# Discretization
domain = FEGrid(coord_max=(10.0, 0.0, 0.0), shape=(1,), fets_eval=fets_eval)
ts = TS(sdomain=domain, dof_resultants=True)
tloop = TLoop(tstepper=ts, debug=False, tline=TLine(min=0.0, step=1, max=1.0))
"""Clamped bar loaded at the right end with unit displacement
[00]-[01]-[02]-[03]-[04]-[05]-[06]-[07]-[08]-[09]-[10]
'u[0] = 0, u[10] = 1"""
domain.coord_max = (1, 0, 0)
domain.shape = (3,)
ts.bcond_list = [
BCDof(var="u", dof=0, value=0.0),
BCDof(var="u", dof=1, link_dofs=[2], link_coeffs=[0.5]),
BCDof(var="u", dof=3, value=1.0),
]
#-------------------------
# element type:
#-------------------------
if element_type == 'linear':
fets_eval = FETS2D4Q( mats_eval = cmdm )
elif element_type == 'quadratic':
fets_eval = FETS2D9Q( mats_eval = cmdm)
#-------------------------
# Discretization
#-------------------------
domain = FEGrid( coord_max = (length,height,0.),
shape = shape,
fets_eval = fets_eval )
#-------------------------
# ts:
#-------------------------
# alternative way to get the top/bottom middle dof using slicing of FEGrid:
# i.e. get the element which is placed right for the center and then get the lower left node
#bottom_middle_dof = domain[shape[0]/2, 0, 0, 0].dofs[0,0,1]
#top_middle_dof = domain[shape[0]/2,-1, 0,-1].dofs[0,0,1]
top_middle_dofs, top_middle_dof_points = domain.get_top_middle_dofs()
top_middle_dof = top_middle_dofs[0,1]
class TestMultiDomain( unittest.TestCase):
'''
Test functionality connected with kinematic constraints
on multiple domains.
'''
def setUp(self):
self.fets_eval = FETS1D2L(mats_eval = MATS1DElastic(E=10.))
# Discretization
self.fe_domain1 = FEGrid( coord_max = (3.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.fe_domain2 = FEGrid( coord_min = (3.,0.,0.),
coord_max = (6.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.fe_domain3 = FEGrid( coord_min = (3.,0.,0.),
coord_max = (6.,0.,0.),
shape = (3,),
fets_eval = self.fets_eval )
self.ts = TS( dof_resultants = True,
sdomain = [ self.fe_domain1, self.fe_domain2 , self.fe_domain3 ],
bcond_list = [BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 4, link_dofs = [3], link_coeffs = [1.],
value = 0. ),
BCDof(var='f', dof = 7, value = 1,
link_dofs = [2], link_coeffs = [2] ) ],
rtrace_list = [ RTraceGraph(name = 'Fi,right over u_right (iteration)' ,
var_y = 'F_int', idx_y = 0,
var_x = 'U_k', idx_x = 1),
]
)
# Add the time-loop control
self.tloop = TLoop( tstepper = self.ts,
tline = TLine( min = 0.0, step = 1, max = 1.0 ))
def test_bar2( self ):
'''Clamped bar composed of two linked bars loaded at the right end
[00]-[01]-[02]-[03]-[04]-[05]-[06]-[07]-[08]-[09]-[10]
[11]-[12]-[13]-[14]-[15]-[16]-[17]-[18]-[19]-[20]-[21]
u[0] = 0, u[5] = u[16], R[-1] = R[21] = 10
'''
self.fe_domain1.set( coord_min = (0,0,0), coord_max = (10,0,0), shape = (10,) )
self.fe_domain2.set( coord_min = (10,0,0), coord_max = (20,0,0), shape = (10,) )
self.ts.set( sdomain = [ self.fe_domain1, self.fe_domain2 ],
bcond_list = [ BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 5, link_dofs = [16], link_coeffs = [1.], value = 0. ),
BCDof(var='f', dof = 21, value = 10 ) ] )
u = self.tloop.eval()
# expected solution
u_ex = array([0., 1., 2., 3., 4., 5., 5., 5., 5., 5., 5.,
5., 5., 5., 5., 5., 5., 6., 7., 8., 9.,10.],
dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
return
# @todo - reactivate this test.
#
# '---------------------------------------------------------------'
# 'Clamped bar composed of two linked bars control displ at right'
# 'u[0] = 0, u[5] = u[16], u[21] = 1'
# Remove the load and put a unit displacement at the right end
# Note, the load is irrelevant in this case and will be rewritten
#
self.ts.bcond_list = [BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 5, link_dofs = [16], link_coeffs = [1.],
value = 0. ),
BCDof(var='u', dof = 21, value = 1. ) ]
# system solver
u = self.tloop.eval()
# expected solution
u_ex = array([0., 1/10., 2/10. , 3/10. , 4/10. , 5/10., 5/10. , 5/10. ,
5/10. , 5/10., 5/10., 5/10., 5/10., 5/10., 5/10.,
5/10., 5/10., 6/10., 7/10., 8/10., 9/10., 1. ],
dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
#
def test_bar4( self ):
'''Clamped bar 3 domains, each with 2 elems (displ at right end)
[0]-[1]-[2] [3]-[4]-[5] [6]-[7]-[8]
u[0] = 0, u[2] = u[3], u[5] = u[6], u[8] = 1'''
self.fe_domain1.set( coord_min = (0,0,0), coord_max = (2,0,0), shape = (2,) )
self.fe_domain2.set( coord_min = (2,0,0), coord_max = (4,0,0), shape = (2,) )
self.fe_domain3.set( coord_min = (4,0,0), coord_max = (6,0,0), shape = (2,) )
self.ts.set( sdomain = [ self.fe_domain1, self.fe_domain2, self.fe_domain3 ],
dof_resultants = True,
bcond_list = [BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 2, link_dofs = [3], link_coeffs = [1.],
value = 0. ),
BCDof(var='u', dof = 5, link_dofs = [6], link_coeffs = [1.],
value = 0. ),
BCDof(var='u', dof = 8, value = 1 ) ],
rtrace_list = [ RTraceGraph(name = 'Fi,right over u_right (iteration)' ,
var_y = 'F_int', idx_y = 0,
var_x = 'U_k', idx_x = 1),
]
)
# system solver
u = self.tloop.eval()
# expected solution
u_ex = array([0., 1/6., 1/3., 1/3., 1/2. , 2/3., 2/3., 5/6., 1. ],
dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
#
def test_bar5( self ):
'''Clamped bar with 4 elements. Elements 2-4 are reinforced
with another bar with 3 elements
[0]-[1]-[2]-[3]-[4]
[5]-[6]-[7]
u[0] = 0, u[1] = u[5], u[3] = u[7], u[4] = 1
'''
self.fe_domain1.set( coord_min = (0,0,0), coord_max = (4,0,0), shape = (4,) )
self.fe_domain2.set( coord_min = (1,0,0), coord_max = (3,0,0), shape = (2,) )
self.ts.set( sdomain = [ self.fe_domain1, self.fe_domain2 ],
bcond_list = [ BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 5, link_dofs = [1], link_coeffs = [1.], value = 0. ),
BCDof(var='u', dof = 7, link_dofs = [3], link_coeffs = [1.], value = 0. ),
BCDof(var='u', dof = 4, value = 1 ) ] )
u = self.tloop.eval()
# expected solution
u_ex = array([0., 1/3., 0.5,
2/3., 1.,
1/3., 0.5, 2/3.],
dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
def test_bar6( self ):
'''Clamped bar with 4 elements. Elements 2-4 are reinforced
with another bar with 1 element linked proportianally
[0]-[1]-[2]-[3]-[4]
[5]-[6]
u[0] = 0, u[1] = u[5], u[3] = u[7], u[4] = 1'''
self.fe_domain1.set( coord_min = (0,0,0), coord_max = (4,0,0), shape = (4,) )
self.fe_domain2.set( coord_min = (1.5,0,0), coord_max = (2.5,0,0), shape = (1,) )
self.ts.set( sdomain = [ self.fe_domain1, self.fe_domain2 ],
bcond_list = [ BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 5, link_dofs = [1,2], link_coeffs = [.5,.5] ),
BCDof(var='u', dof = 6, link_dofs = [2,3], link_coeffs = [.5,.5] ),
BCDof(var='u', dof = 4, value = 1 ) ] )
u = self.tloop.eval()
# expected solution
u_ex = array([-0., 0.3, 0.5 , 0.7 , 1. , 0.4, 0.6], dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
def test_bar7( self ):
'''Two clamped beams link in parallel
and loaded by force at right end
[5]-[6]-[7]-[8]-[9]
[0]-[1]-[2]-[3]-[4]
u[5] = u[0], u[0] = 0, u[4] = u[9], R[4] = 1'''
self.fe_domain1.set( coord_min = (0,0,0), coord_max = (4,0,0), shape = (4,) )
self.fe_domain2.set( coord_min = (0,0,0), coord_max = (4,0,0), shape = (4,) )
self.ts.set( sdomain = [ self.fe_domain1, self.fe_domain2 ],
bcond_list = [BCDof(var='u', dof = 0, value = 0.),
BCDof(var='u', dof = 5, link_dofs = [0], link_coeffs = [1.] ),
BCDof(var='u', dof = 4, link_dofs = [9], link_coeffs = [0.5] ),
BCDof(var='f', dof = 4, value = 1 ),
BCDof(var='f', dof = 9, value = 1 ) ] )
u = self.tloop.eval()
# expected solution
u_ex = array([-0. , 0.06, 0.12, 0.18, 0.24, 0.,
0.12, 0.24 , 0.36, 0.48],
dtype = float )
for u_, u_ex_ in zip( u, u_ex ):
self.assertAlmostEqual( u_, u_ex_ )
fineness_bond = 6
#fineness_no_bond = 2
bond_length = 0.005 #all lengths in meter
#no_bond_length = 0.001
width = 0.005
height = width
fets_reinf = FETS1D52B4ULRH(mats_eval = MATS1D5Bond(Ef = 17000., #MN/m2
Af = 2.65e-6/4.,
Am = 0.,
Em = 0.,
tau_max = 10.5, #10
tau_fr = 10.5,
s_cr = 0.03e-2 ))
fe_domain1 = FEGrid( coord_min = (0.,-0.0003, 0.),
coord_max = (bond_length, 0. ,0.),
shape = ( fineness_bond * 1 ,1 ),
fets_eval = fets_reinf )
# characteristic element size
concrete = MATS3DMicroplaneDamage( model_version = 'stiffness',
E = 34e3,
nu = 0.2,
phi_fn = PhiFnStrainSoftening( f_t = 2.8968,
G_f = 0.001117,
h = bond_length / fineness_bond )
)
fets_eval_mdm = FETS3D8H( mats_eval = concrete )
fets_eval2 = fets_eval_mdm
fets_eval2.vtk_r *= 0.8
# x,y = - r * cos( phi ), r * sin( phi )
# return c_[ x,y ]
# The 'coord_max'-coordinates of FEGrid
# are derived in the method arch2d and
# automatically considered in the transformation
length = 1.
height = 1.
# 100 linear elements
shape = (4*20,1)
# Discretization
domain = FEGrid( coord_max = (length,height,0.),
shape = shape,
fets_eval = fets_eval,
geo_transform = arch_2d )
#
#right_dofs, right_dof_r = domain.get_right_dofs()
#right_dof = right_dofs[0,0]
#print 'right_dof',right_dof
top_middle_dofs, top_middle_dof_r = domain.get_top_middle_dofs()
# dof in global y-direction
top_middle_dof = top_middle_dofs[0,1]
print 'top_middle_dofs',top_middle_dofs
print 'top_middle_dof' ,top_middle_dof
top_dofs, top_dof_r = domain.get_top_dofs()
# dof in global y-direction
print 'fets_eval.n_e_dofs' , fets_eval.n_e_dofs
def example_with_new_domain():
from ibvpy.api import \
TStepper as TS, MGridDomain, RTraceGraph, RTraceDomainField, TLoop, \
TLine, IBVPSolve as IS, DOTSEval
from ibvpy.api import BCDofGroup
from ibvpy.mats.mats1D5.mats1D5bond import MATS1D5Bond
from ibvpy.mesh.mgrid_domain import MeshGridAdaptor
from ibvpy.mesh.fe_grid import FEGrid
from ibvpy.fets.fets1D5.fets1D52b4uLRH import FETS1D52B4ULRH
from mathkit.mfn.mfn_line.mfn_line import MFnLineArray
fets_eval = FETS1D52B4ULRH(mats_eval = MATS1D5Bond(Ef = 0., Af =0.,
Em = 0., Am = 0.,
bond_fn = MFnLineArray(xdata = [0.,1.],
ydata = [0.,1.])))
# Tseval for a discretized line domain
tseval = DOTSEval( fets_eval = fets_eval )
domain = FEGrid( coord_max = (1., 0.1, 0.0), #new domain
shape = (2,1),
n_nodal_dofs = 1,
dof_r = [[-1,-1],[1,-1],[1,1],[-1,1]],
geo_r = [[-1,-1],[1,-1],[1,1],[-1,1]])
ts = TS( tse = tseval,
sdomain = domain,
# conversion to list (square brackets) is only necessary for slicing of
# single dofs, e.g "get_left_dofs()[0,1]"
bcond_list = [BCDofGroup(var='u', value = 0.,dims = [0],
get_dof_method = domain.get_top_dofs),
# BCDofGroup(var='u', value = 0.,dims = [0],
# get_dof_method = domain.get_bottom_left_dofs),
# imposed displacement for all right dofs in y-direction:
# BCDofGroup(var='f', value = -1., dims = [0],
# get_dof_method = domain.get_bottom_left_dofs),
BCDofGroup(var='f', value = 1./3., dims = [0],
get_dof_method = domain.get_bottom_dofs )],
rtrace_list = [ RTraceGraph(name = 'Internal Force - Displacement' ,
var_y = 'F_int', idx_y = domain.get_bottom_right_dofs()[0][0,0],
var_x = 'U_k', idx_x = domain.get_bottom_right_dofs()[0][0,0]),
RTraceDomainField(name = 'Stress' ,
#position = 'int_pnts',
var = 'sig_app', idx = 0),
RTraceDomainField(name = 'Displacement' ,
var = 'u', idx = 0),
RTraceDomainField(name = 'Strain' ,
var = 'eps_app', idx = 0),
RTraceDomainField(name = 'Slip' ,
var = 'slip', idx = 0),
RTraceDomainField(name = 'Shear' ,
var = 'shear', idx = 0)
# RTraceDomainField(name = 'N0' ,
# var = 'N_mtx', idx = 0,
# record_on = 'update')
]
)
# Add the time-loop control
tloop = TLoop( tstepper = ts,
DT = 1.,
tline = TLine( min = 0.0, max = 1.0 ))
tloop.eval()
# Put the whole stuff into the simulation-framework to map the
# individual pieces of definition into the user interface.
#
from ibvpy.plugins.ibvpy_app import IBVPyApp
app = IBVPyApp( ibv_resource = tloop )
app.main()
#-------------------------
# element type:
#-------------------------
if element_type == 'linear':
fets_eval = FETS2D4Q( mats_eval = cmdm )
elif element_type == 'quadratic':
fets_eval = FETS2D9Q( mats_eval = cmdm)
#-------------------------
# Discretization
#-------------------------
domain = FEGrid( coord_max = (length,height,0.),
shape = shape,
fets_eval = fets_eval )
# OSOLET: Use individual domains instead for notched specimen.
# For a notched beam deactivate the center element at the bottom of the beam:
# domain.deactivate( (shape[0]/2,0) )
# Note: For the center element an odd numer is necessary for n_elem[0].
# For the center loading at top an even numkber is necessary.
#-------------------------
# ts:
#-------------------------
#right_dofs = domain[0, 0, 0, 0].dofs[0,0,0]
#print 'right_dofs', right_dofs
#-------------------------
# Discretization:
#-------------------------
# The 'coord_max'-coordinates of FEGrid
# are derived in the method arch2d and
# automatically considered in the transformation
# therefore the values define here do not effect
# the calculation
length = 1.
height = 1.
domain = FEGrid( coord_max = (length,height,0.),
shape = shape,
fets_eval = fets_eval,
geo_transform = arch_2d )
#-------------------------
# ts:
#-------------------------
# Depends on the choice of loading specified in the calculation
# parameters defined above ('symmetric' or 'asymmetric' loading):
# --- (single displacement at top of the arc)
if loading_type == 'symmetric':
# get dofs corresponding to the loading case:
top_middle_dofs, top_middle_dof_points = domain.get_top_middle_dofs()
# dof in global y-direction:
from ibvpy.api import \
TStepper as TS, RTraceGraph, RTraceDomainField, TLoop, \
TLine, BCDof, IBVPSolve as IS, DOTSEval
from ibvpy.mats.mats1D.mats1D_elastic.mats1D_elastic import MATS1DElastic
from ibvpy.bcond.bc_slice import BCSlice
from ibvpy.mesh.fe_grid import FEGrid
from ibvpy.fets.fets1D.fets1D2l import FETS1D2L
if __name__ == '__main__':
fets_eval = FETS1D2L(mats_eval = MATS1DElastic(E=10., A=1.))
# Discretization
domain = FEGrid( coord_max = (10.,0.,0.),
shape = (1,),
fets_eval = fets_eval )
ts = TS( sdomain = domain,
dof_resultants = True
)
tloop = TLoop( tstepper = ts,
tline = TLine( min = 0.0, step = 1, max = 1.0 ))
domain.coord_max = (10,0,0)
domain.shape = (10,)
bc_left = BCSlice( var = 'u', value = 0., slice = domain[ 0, 0] )
bc_right = BCSlice( var = 'u', value = 1., slice = domain[1:,:] )
ts.bcond_list = [ bc_left, bc_right ]
# Geometric transformation
#
def arch_2d( points ):
x = points[:,0]
y = points[:,1]
l = x[-1] - x[0]
R = 10.
phi = x / l * pi
r = R + y
x,y = - r * cos( phi ), r * sin( phi )
return c_[ x,y ]
# Discretization
domain = FEGrid( coord_max = (length,height,0.),
shape = (10,5),
# shape = (5,2),
fets_eval = fets_eval,
geo_transform = arch_2d )
#
right_dofs, right_dof_r = domain.get_right_dofs()
right_dof = right_dofs[0,0]
print 'right_dof',right_dof
tstepper = TS( sdomain = domain,
bcond_list = [ BCDofGroup( var='u', value = 0., dims = [0,1],
get_dof_method = domain.get_left_dofs ),
BCDofGroup( var='u', value = 0.01125, dims = [0],
get_dof_method = domain.get_right_dofs ) ],
rtrace_list = [
RTraceGraph(name = 'Fi,right over u_right (iteration)' ,
var_y = 'F_int', idx_y = right_dof,