def solids_GUI(compute_strains=False, plot_contours=True):
"""
Run a complete workflow for a Finite Element Analysis
Parameters
----------
compute_strains : Bool (optional)
Boolean variable to compute Strains and Stresses at nodes.
By default it is False.
plot_contours : Bool (optional)
Boolean variable to plot contours of the computed variables.
By default it is True.
Returns
-------
UC : ndarray (nnodes, 2)
Displacements at nodes.
E_nodes : ndarray (nnodes, 3), optional
Strains at nodes. It is returned when `compute_strains` is True.
S_nodes : ndarray (nnodes, 3), optional
Stresses at nodes. It is returned when `compute_strains` is True.
"""
folder = pre.initial_params()
start_time = datetime.now()
echo = False
#%% PRE-PROCESSING
nodes, mats, elements, loads = pre.readin(folder=folder)
if echo:
pre.echomod(nodes, mats, elements, loads, folder=folder)
DME , IBC , neq = ass.DME(nodes, elements)
print("Number of nodes: {}".format(nodes.shape[0]))
print("Number of elements: {}".format(elements.shape[0]))
print("Number of equations: {}".format(neq))
#%% SYSTEM ASSEMBLY
KG = ass.assembler(elements, mats, nodes, neq, DME)
RHSG = ass.loadasem(loads, IBC, neq)
#%% SYSTEM SOLUTION
UG = sol.static_sol(KG, RHSG)
if not(np.allclose(KG.dot(UG)/KG.max(), RHSG/KG.max())):
print("The system is not in equilibrium!")
end_time = datetime.now()
print('Duration for system solution: {}'.format(end_time - start_time))
#%% POST-PROCESSING
start_time = datetime.now()
UC = pos.complete_disp(IBC, nodes, UG)
E_nodes, S_nodes = None, None
if compute_strains:
E_nodes, S_nodes = pos.strain_nodes(nodes , elements, mats, UC)
if plot_contours:
pos.fields_plot(elements, nodes, UC, E_nodes=E_nodes, S_nodes=S_nodes)
end_time = datetime.now()
print('Duration for post processing: {}'.format(end_time - start_time))
print('Analysis terminated successfully!')
return UC, E_nodes, S_nodes if compute_strains else UC
def test_2_elements():
"""2x1 mesh cantilever beam"""
nodes = np.array([[0, 0, 0], [1, 1, 0], [2, 2, 0], [3, 0, 1], [4, 1, 1],
[5, 2, 1]])
cons = np.array([[-1, -1], [0, 0], [0, 0], [-1, -1], [0, 0], [0, 0]])
eles = np.array([[0, 1, 0, 0, 1, 4, 3], [1, 1, 0, 1, 2, 5, 4]])
loads = np.array([[2, 0, -0.5], [5, 0, -0.5]])
mater = np.array([[1.0, 0.3]])
assem_op, bc_array, neq = ass.DME(cons, eles)
stiff, _ = ass.assembler(eles, mater, nodes, neq, assem_op)
load_vec = ass.loadasem(loads, bc_array, neq)
disp = sol.static_sol(stiff, load_vec)
disp_complete = pos.complete_disp(bc_array, nodes, disp)
disp_analytic = 1 / 45 * np.array([[0, 0], [-273, -390], [-364, -1144],
[0, 0], [273, -390], [364, -1144]])
assert np.allclose(disp_complete, disp_analytic)
def test_4_elements():
"""2×2 mesh with uniaxial load"""
nodes = np.array([[0, 0, 0], [1, 2, 0], [2, 2, 2], [3, 0, 2], [4, 1, 0],
[5, 2, 1], [6, 1, 2], [7, 0, 1], [8, 1, 1]])
cons = np.array([[0, -1], [0, -1], [0, 0], [0, 0], [-1, -1], [0, 0],
[0, 0], [0, 0], [0, 0]])
eles = np.array([[0, 1, 0, 0, 4, 8, 7], [1, 1, 0, 4, 1, 5, 8],
[2, 1, 0, 7, 8, 6, 3], [3, 1, 0, 8, 5, 2, 6]])
loads = np.array([[3, 0, 1], [6, 0, 2], [2, 0, 1]])
mater = np.array([[1.0, 0.3]])
assem_op, bc_array, neq = ass.DME(cons, eles)
stiff, _ = ass.assembler(eles, mater, nodes, neq, assem_op)
load_vec = ass.loadasem(loads, bc_array, neq)
disp = sol.static_sol(stiff, load_vec)
disp_complete = pos.complete_disp(bc_array, nodes, disp)
disp_analytic = np.array([[0.6, 0.0], [-0.6, 0.0], [-0.6, 4.0], [0.6, 4.0],
[0.0, 0.0], [-0.6, 2.0], [0.0, 4.0], [0.6, 2.0],
[0.0, 2.0]])
assert np.allclose(disp_complete, disp_analytic)
import solidspy.solutil as sol
start_time = datetime.now()
#%% PRE-PROCESSING
nodes, mats, elements, loads = pre.readin()
DME , IBC , neq = ass.DME(nodes, elements)
print("Number of nodes: {}".format(nodes.shape[0]))
print("Number of elements: {}".format(elements.shape[0]))
print("Number of equations: {}".format(neq))
#%% SYSTEM ASSEMBLY
KG = ass.assembler(elements, mats, nodes, neq, DME, sparse=False)
RHSG = ass.loadasem(loads, IBC, neq)
##%% SYSTEM SOLUTION
UG = sol.static_sol(KG, RHSG)
if not(np.allclose(KG.dot(UG)/KG.max(), RHSG/KG.max())):
print("The system is not in equilibrium!")
end_time = datetime.now()
print('Duration for system solution: {}'.format(end_time - start_time))
#%% POST-PROCESSING
start_time = datetime.now()
UC = pos.complete_disp(IBC, nodes, UG)
pos.fields_plot(elements, nodes, UC)
end_time = datetime.now()
print('Duration for post processing: {}'.format(end_time - start_time))
print('Analysis terminated successfully!')
def solids_GUI(plot_contours=True, compute_strains=False, folder=None):
"""
Run a complete workflow for a Finite Element Analysis
Parameters
----------
plot_contours : Bool (optional)
Boolean variable to plot contours of the computed variables.
By default it is True.
compute_strains : Bool (optional)
Boolean variable to compute Strains and Stresses at nodes.
By default it is False.
folder : string (optional)
String with the path to the input files. If not provided
it would ask for it in a pop-up window.
Returns
-------
UC : ndarray (nnodes, 2)
Displacements at nodes.
E_nodes : ndarray (nnodes, 3), optional
Strains at nodes. It is returned when `compute_strains` is True.
S_nodes : ndarray (nnodes, 3), optional
Stresses at nodes. It is returned when `compute_strains` is True.
"""
if folder is None:
folder = pre.initial_params()
start_time = datetime.now()
echo = False
# Pre-processing
nodes, mats, elements, loads = pre.readin(folder=folder)
if echo:
pre.echomod(nodes, mats, elements, loads, folder=folder)
DME, IBC, neq = ass.DME(nodes, elements)
print("Number of nodes: {}".format(nodes.shape[0]))
print("Number of elements: {}".format(elements.shape[0]))
print("Number of equations: {}".format(neq))
# System assembly
KG = ass.assembler(elements, mats, nodes, neq, DME)
RHSG = ass.loadasem(loads, IBC, neq)
# System solution
UG = sol.static_sol(KG, RHSG)
if not (np.allclose(KG.dot(UG) / KG.max(), RHSG / KG.max())):
print("The system is not in equilibrium!")
end_time = datetime.now()
print('Duration for system solution: {}'.format(end_time - start_time))
# Post-processing
start_time = datetime.now()
UC = pos.complete_disp(IBC, nodes, UG)
E_nodes, S_nodes = None, None
if compute_strains:
E_nodes, S_nodes = pos.strain_nodes(nodes, elements, mats, UC)
if plot_contours:
pos.fields_plot(elements, nodes, UC, E_nodes=E_nodes, S_nodes=S_nodes)
end_time = datetime.now()
print('Duration for post processing: {}'.format(end_time - start_time))
print('Analysis terminated successfully!')
return (UC, E_nodes, S_nodes) if compute_strains else UC
# System solution
t1=time.time()
UG = sol.static_sol(KG, RHSG) # nodes added by me
if not (np.allclose(KG.dot(UG) / KG.max(), RHSG / KG.max())):
print("The system is not in equilibrium!")
t2=time.time()
print("system solution ", t2-t1)
end_time = dt.now()
#print('Duration for system solution: {}'.format(end_time - start_time))
# Post-processing
start_time = dt.now()
UC = pos.complete_disp(IBC, nodes, UG) # uc are x and y displacements
#UC2 = pos.complete_disp(IBC, nodes, UG2) # uc are x and y displacements
E_nodes, S_nodes = None, None
if compute_strains:
E_nodes, S_nodes = pos.strain_nodes(nodes, elements, mats, UC)
#E_nodes2,S_nodes2=pos.strain_nodes(nodes, elements, mats, UC2)
if plot_contours:
pos.fields_plot(elements, nodes, UC, E_nodes=E_nodes, S_nodes=S_nodes) # some matplotlib internal function to make it look smoother
end_time = dt.now()
# calculation of principal stresses
## are signes importnatn here???
def solids_auto(data, plot_contours=True, compute_strains=False):
"""
Run a complete workflow for a Finite Element Analysis
Parameters
----------
data : dict
Simulation data composed of nodes, constrains, elements,
materials and loads.
plot_contours : Bool (optional)
Boolean variable to plot contours of the computed variables.
By default it is True.
compute_strains : Bool (optional)
Boolean variable to compute Strains and Stresses at nodes.
By default it is False.
Returns
-------
UC : ndarray (nnodes, 2)
Displacements at nodes.
E_nodes : ndarray (nnodes, 3), optional
Strains at nodes. It is returned when `compute_strains` is True.
S_nodes : ndarray (nnodes, 3), optional
Stresses at nodes. It is returned when `compute_strains` is True.
"""
# Retrieving data
nodes = data["nodes"]
cons = data["cons"]
elements = data["elements"]
mats = data["mats"]
loads = data["loads"]
# Pre-processing
assem_op, bc_array, neq = ass.DME(cons, elements)
print("Number of nodes: {}".format(nodes.shape[0]))
print("Number of elements: {}".format(elements.shape[0]))
print("Number of equations: {}".format(neq))
# System assembly
stiff_mat, _ = ass.assembler(elements, mats, nodes, neq, assem_op)
rhs_vec = ass.loadasem(loads, bc_array, neq)
# System solution
start_time = datetime.now()
disp = sol.static_sol(stiff_mat, rhs_vec)
if not np.allclose(
stiff_mat.dot(disp) / stiff_mat.max(), rhs_vec / stiff_mat.max()):
print("The system is not in equilibrium!")
end_time = datetime.now()
print('Duration for system solution: {}'.format(end_time - start_time))
# Post-processing
start_time = datetime.now()
disp_complete = pos.complete_disp(bc_array, nodes, disp)
strain_nodes, stress_nodes = None, None
if compute_strains:
strain_nodes, stress_nodes = pos.strain_nodes(nodes, elements, mats,
disp_complete)
if plot_contours:
pos.fields_plot(elements,
nodes,
disp_complete,
E_nodes=strain_nodes,
S_nodes=stress_nodes)
end_time = datetime.now()
print('Duration for post processing: {}'.format(end_time - start_time))
print('Analysis terminated successfully!')
if compute_strains:
return (disp_complete, strain_nodes, stress_nodes)
else:
return disp_complete
def solids_GUI(plot_contours=True, compute_strains=False, folder=None):
"""
Run a complete workflow for a Finite Element Analysis
Parameters
----------
plot_contours : Bool (optional)
Boolean variable to plot contours of the computed variables.
By default it is True.
compute_strains : Bool (optional)
Boolean variable to compute Strains and Stresses at nodes.
By default it is False.
folder : string (optional)
String with the path to the input files. If not provided
it would ask for it in a pop-up window.
Returns
-------
UC : ndarray (nnodes, 2)
Displacements at nodes.
E_nodes : ndarray (nnodes, 3), optional
Strains at nodes. It is returned when `compute_strains` is True.
S_nodes : ndarray (nnodes, 3), optional
Stresses at nodes. It is returned when `compute_strains` is True.
"""
if folder is None:
folder = pre.initial_params()
start_time = datetime.now()
echo = False
# Pre-processing
nodes, mats, elements, loads = pre.readin(folder=folder)
if echo:
pre.echomod(nodes, mats, elements, loads, folder=folder)
assem_op, bc_array, neq = ass.DME(nodes[:, -2:], elements)
print("Number of nodes: {}".format(nodes.shape[0]))
print("Number of elements: {}".format(elements.shape[0]))
print("Number of equations: {}".format(neq))
# System assembly
stiff_mat, _ = ass.assembler(elements, mats, nodes[:, :3], neq, assem_op)
rhs_vec = ass.loadasem(loads, bc_array, neq)
# System solution
disp = sol.static_sol(stiff_mat, rhs_vec)
if not np.allclose(
stiff_mat.dot(disp) / stiff_mat.max(), rhs_vec / stiff_mat.max()):
print("The system is not in equilibrium!")
end_time = datetime.now()
print('Duration for system solution: {}'.format(end_time - start_time))
# Post-processing
start_time = datetime.now()
disp_complete = pos.complete_disp(bc_array, nodes, disp)
strain_nodes, stress_nodes = None, None
if compute_strains:
strain_nodes, stress_nodes = pos.strain_nodes(nodes, elements, mats,
disp_complete)
if plot_contours:
pos.fields_plot(elements,
nodes,
disp_complete,
E_nodes=strain_nodes,
S_nodes=stress_nodes)
end_time = datetime.now()
print('Duration for post processing: {}'.format(end_time - start_time))
print('Analysis terminated successfully!')
if compute_strains:
return (disp_complete, strain_nodes, stress_nodes)
else:
return disp_complete