yield_strength=500,
color='grey')
timber = Material(name='Timber',
elastic_modulus=8e3,
poissons_ratio=0.35,
yield_strength=20,
color='burlywood')
# create 310UB40.4
ub = sections.ISection(d=304, b=165, t_f=10.2, t_w=6.1, r=11.4, n_r=8)
# create timber panel on top of the UB
panel = sections.RectangularSection(d=50, b=600, shift=[-217.5, 304])
# merge the two sections into one geometry object
geometry = sections.MergedSection([ub, panel])
geometry.clean_geometry() # clean the geometry
geometry.plot_geometry() # plot the geometry
# create a mesh - use a mesh size of 5 for the UB, 20 for the panel
mesh = geometry.create_mesh(mesh_sizes=[5, 20])
# create a CrossSection object - take care to list the materials in the same order as entered into
# the MergedSection
section = CrossSection(geometry, mesh, materials=[steel, timber])
section.display_mesh_info() # display the mesh information
# plot the mesh with coloured materials and a line transparency of 0.5
section.plot_mesh(materials=True, alpha=0.5)
# perform a geometric, warping and plastic analysis
def calculate(self, loadProfileFromDB):
'''Se ejecuta el calculo de las propiedades de la seccion.
Referencia
----------
rx, ry : radio de giro de la seccion | sqrt(I/A)
ri : radio de giro en -y- de un solo perfil c
c_x, c_y : coordenada del centroide de la seccion
sc_x, sc_y : coordenada del centro de corte
A : Area de la seccion
Cw : Constante torsional de warping de la seccion
J : Constante de torsion de St. Venant
Si : modulo elastico
j : mitad de la constante monociclica a compresion en eje -y- (beta22-)
'''
if loadProfileFromDB:
try:
self.load()
except:
loadProfileFromDB = False
pass
if not loadProfileFromDB:
c0 = c_profile(H= self.H, B= self. B, t= self.t, r_out= self.r_out)
c0.calculate(loadProfileFromDB)
c1 = sections.CeeSection(d=self.H, b=self.B+self.r_out, l=self.r_out, t=self.t, r_out=self.r_out, n_r=8)
c2 = deepcopy(c1)
# corto los labios y el radio c1
p1 = c1.add_point([self.B, 0])
p2 = c1.add_point([self.B, self.t])
p3 = c1.add_point([self.B, self.H])
p4 = c1.add_point([self.B, self.H-self.t])
c1.add_facet([p1, p2])
c1.add_facet([p3, p4])
c1.add_hole([self.B+self.r_out/10, self.t/2]) # add hole
c1.add_hole([self.B+self.r_out/10, self.H-self.t/2]) # add hole
c1.clean_geometry() # clean the geometry
c2 = deepcopy(c1)
c2.mirror_section(axis= 'y', mirror_point=[0, 0])
if self.s:
c1.shift = [self.s/2, 0]
c1.shift_section()
c2.shift = [-self.s/2, 0]
c2.shift_section()
# soldadura en los extremos del alma
if self.wld:
h = self.wld*self.r_out # weld length
a = self.wld*self.r_out*2 + self.s # base de la soldadura
weld1 = sections.CustomSection(
points=[[a/2,0], [-a/2, 0], [0, h]],
facets=[[0,1], [1,2], [2,0]],
holes=[],
control_points=[[h / 3, h / 3]]
)
weld2 = deepcopy(weld1)
weld2.mirror_section(axis= 'x', mirror_point=[0, 0])
weld2.shift = [0, self.H]
weld2.shift_section()
geometry = sections.MergedSection([c1, c2, weld1, weld2])
geometry.clean_geometry(verbose= False)
if self.s:
geometry.add_hole([0, self.H/2])
mesh = geometry.create_mesh(mesh_sizes=[self.mesh_size, self.mesh_size, self.mesh_size, self.mesh_size])
else:
geometry = sections.MergedSection([c1, c2])
geometry.clean_geometry()
mesh = geometry.create_mesh(mesh_sizes=[self.mesh_size, self.mesh_size])
section = CrossSection(geometry, mesh)
#mesh_c1 = c1.create_mesh(mesh_sizes=[self.mesh_size])
#section_c1 = CrossSection(c1, mesh_c1)
#section_c1.calculate_geometric_properties()
#section_c1.calculate_warping_properties()
section.calculate_geometric_properties()
section.calculate_warping_properties()
(self.c_x, self.c_y) = section.get_c() # centroides
(self.sc_x, self.sc_y) = section.get_sc() # shear center
self.Cw = section.get_gamma() # warping
(self.rx, self.ry) = section.get_rc() # radios de giro
self.J = section.get_j()
self.A = section.get_area()
self.Ae = self.A
self.ri = c0.ry # radios de giro y de c1
(self.Ix, self.Iy, _) = section.get_ic()
(self.Sx, _, _, _) = section.get_z() # modulo elastico
self.j = section.get_beta_p()[3]/2.0
self.save(section)
self.section = section
points = [[0, 0], [50, 0], [25, 50]]
facets = [[0, 1], [1, 2], [2, 0]]
holes = []
control_points = [[25, 25]]
triangle = sections.CustomSection(points, facets, holes, control_points,
shift=[25, 150])
# create a 100x100x6 EA on the right of the RHS
angle = sections.AngleSection(d=100, b=100, t=6, r_r=8, r_t=5, n_r=8,
shift=[100, 25])
# create a list of the sections to be merged
section_list = [rhs, triangle, angle]
# merge the three sections into one geometry object
geometry = sections.MergedSection(section_list)
# clean the geometry - print cleaning information to the terminal
geometry.clean_geometry(verbose=True)
geometry.plot_geometry() # plot the geometry
# create a mesh - use a mesh size of 2.5 for the RHS, 5 for the triangle and
# 3 for the angle
mesh = geometry.create_mesh(mesh_sizes=[2.5, 5, 3])
# create a CrossSection object
section = CrossSection(geometry, mesh)
section.display_mesh_info() # display the mesh information
section.plot_mesh() # plot the generated mesh
# perform a geometric, warping and plastic anaylsis, displaying the time info
# create a 200PFC and a 150PFC
pfc1 = sections.PfcSection(d=203, b=133, t_f=7.8, t_w=5.8, r=8.9, n_r=8)
pfc2 = sections.PfcSection(d=150,
b=133,
t_f=7.8,
t_w=5.8,
r=8.9,
n_r=8,
shift=[0, 26.5])
# mirror the 200 PFC about the y-axis
pfc1.mirror_section(axis='y', mirror_point=[0, 0])
# merge the pfc sections
geometry = sections.MergedSection([pfc1, pfc2])
# rotate the geometry counter-clockwise by 30 degrees
geometry.rotate_section(angle=30)
# clean the geometry - print cleaning information to the terminal
geometry.clean_geometry(verbose=True)
geometry.plot_geometry() # plot the geometry
# create a mesh - use a mesh size of 5 for the 200PFC and 4 for the 150PFC
mesh = geometry.create_mesh(mesh_sizes=[5, 4])
# create a CrossSection object
section = CrossSection(geometry, mesh)
section.display_mesh_info() # display the mesh information
section.plot_mesh() # plot the generated mesh
def boxgenerator(b, d, t_w, t_f, d_stif, t_stif, n_stif):
"""
This function allows for generation of a stiffened box section
This only works with Pint units aware data in SI format at the moment.
"""
import copy
import sectionproperties.pre.sections as sections
from sectionproperties.analysis.cross_section import CrossSection
# Create the main box sections
top_flange = sections.RectangularSection(d=t_f, b=b, shift=[0, d - t_f])
bot_flange = sections.RectangularSection(d=t_f, b=b, shift=[0, 0])
left_web = sections.RectangularSection(d=d - 2 * t_f,
b=t_w,
shift=[0, t_f])
right_web = sections.RectangularSection(d=d - 2 * t_f,
b=t_w,
shift=[b - t_w, t_f])
if n_stif == 3:
#Create top stiffeners
top_stif1 = sections.RectangularSection(d=d_stif,
b=t_stif,
shift=[(b - t_stif) / 2,
d - t_f - d_stif])
top_stif2 = copy.deepcopy(top_stif1)
top_stif3 = copy.deepcopy(top_stif1)
top_stif2.shift = [-b / 4, 0]
top_stif3.shift = [b / 4, 0]
top_stif2.shift_section()
top_stif3.shift_section()
#Create left stiffeners
left_stif1 = sections.RectangularSection(d=t_stif,
b=d_stif,
shift=[t_w, (d - t_stif) / 2])
left_stif2 = copy.deepcopy(left_stif1)
left_stif3 = copy.deepcopy(left_stif1)
left_stif2.shift = [0, -d / 4]
left_stif3.shift = [0, d / 4]
left_stif2.shift_section()
left_stif3.shift_section()
#Create right stiffeners
right_stif1 = copy.deepcopy(left_stif1)
right_stif2 = copy.deepcopy(left_stif2)
right_stif3 = copy.deepcopy(left_stif3)
right_stif1.shift = [b - 2 * t_w - d_stif, 0]
right_stif2.shift = [b - 2 * t_w - d_stif, 0]
right_stif3.shift = [b - 2 * t_w - d_stif, 0]
right_stif1.shift_section()
right_stif2.shift_section()
right_stif3.shift_section()
# create a list of the sections to be merged
section_list = [
top_flange, bot_flange, left_web, right_web, top_stif1, top_stif2,
top_stif3, left_stif1, left_stif2, left_stif3, right_stif1,
right_stif2, right_stif3
]
elif n_stif == 2:
#Create top stiffeners
top_stif1 = sections.RectangularSection(d=d_stif,
b=t_stif,
shift=[(b - t_stif) / 3.0,
d - t_f - d_stif])
top_stif2 = copy.deepcopy(top_stif1)
top_stif2.shift = [b / 3, 0]
top_stif2.shift_section()
#Create left stiffeners
left_stif1 = sections.RectangularSection(d=t_stif,
b=d_stif,
shift=[t_w, (d - t_stif) / 3])
left_stif2 = copy.deepcopy(left_stif1)
left_stif2.shift = [0, d / 3]
left_stif2.shift_section()
#Create right stiffeners
right_stif1 = copy.deepcopy(left_stif1)
right_stif2 = copy.deepcopy(left_stif2)
right_stif1.shift = [b - 2 * t_w - d_stif, 0]
right_stif2.shift = [b - 2 * t_w - d_stif, 0]
right_stif1.shift_section()
right_stif2.shift_section()
# create a list of the sections to be merged
section_list = [
top_flange, bot_flange, left_web, right_web, top_stif1, top_stif2,
left_stif1, left_stif2, right_stif1, right_stif2
]
else:
print("Number of stiffeners not supported")
# merge the three sections into one geometry object
geometry = sections.MergedSection(section_list)
geometry.clean_geometry(verbose=False) # clean the geometry
geometry.add_hole([b / 2, d / 2])
fig, ax = plt.subplots()
ax.set_aspect('equal')
geometry.plot_geometry(ax=ax) # plot the geometry
# create a mesh - use a mesh size of 12 for the RHS, 6 for stiffeners
rhs_mesh = d / 6
stif_mesh = t_stif
if n_stif == 3:
mesh = geometry.create_mesh(mesh_sizes=[
rhs_mesh, rhs_mesh, rhs_mesh, rhs_mesh, stif_mesh, stif_mesh,
stif_mesh, stif_mesh, stif_mesh, stif_mesh, stif_mesh, stif_mesh,
stif_mesh
])
elif n_stif == 2:
mesh = geometry.create_mesh(mesh_sizes=[
rhs_mesh, rhs_mesh, rhs_mesh, rhs_mesh, stif_mesh, stif_mesh,
stif_mesh, stif_mesh, stif_mesh, stif_mesh
])
else:
print("Number of stiffeners not supported")
section = CrossSection(geometry, mesh) # create a CrossSection object
return section, fig, ax
