def get_elems():
n1, n2, n3, n4, n5, n6, n7, n8, n9, n10 = get_nodes()
el1 = Elem(1, [n1, n2], "B31")
el2 = Elem(2, [n2, n3], "B31")
el3 = Elem(3, [n3, n1], "B31")
el4 = Elem(4, [n1, n2, n3, n4], "S4R")
return el1, el2, el3, el4
def numpy_array_to_list_of_elements(res_, eltype, elset, ada_el_type,
fem: "FEM") -> List["Elem"]:
if ada_el_type == Elem.EL_TYPES.CONNECTOR_SHAPES.CONNECTOR:
connectors = []
for e in res_:
if len(e) != 3:
raise ValueError()
el_id = e[0]
n1, n2 = [fem.nodes.from_id(n) for n in e[1:]]
con = Connector(next(con_names),
el_id,
n1,
n2,
con_type=None,
con_sec=None,
parent=fem)
connectors.append(con)
return connectors
else:
return [
Elem(
e[0],
[fem.nodes.from_id(n) for n in e[1:]],
ada_el_type,
elset,
el_formulation_override=eltype,
parent=fem,
) for e in res_
]
def grab_mass(match):
d = match.groupdict()
nodeno = str_to_int(d["nodeno"])
mass_in = [
roundoff(d["m1"]),
roundoff(d["m2"]),
roundoff(d["m3"]),
roundoff(d["m4"]),
roundoff(d["m5"]),
roundoff(d["m6"]),
]
masses = [m for m in mass_in if m != 0.0]
if checkEqual2(masses):
mass_type = None
masses = [masses[0]] if len(masses) > 0 else [0.0]
else:
mass_type = "anisotropic"
no = fem.nodes.from_id(nodeno)
fem_set = FemSet(f"m{nodeno}", [], "elset", metadata=dict(internal=True), parent=fem)
mass = Mass(f"m{nodeno}", fem_set, masses, "mass", ptype=mass_type, parent=fem)
elem = Elem(no.id, [no], "mass", fem_set, mass_props=mass, parent=fem)
fem.elements.add(elem)
fem_set.add_members([elem])
fem.sets.add(fem_set)
return Mass(f"m{nodeno}", fem_set, masses, "mass", ptype=mass_type, parent=fem)
def get_elements_from_entity(model: gmsh.model, ent, fem: FEM,
dim) -> List[Elem]:
elem_types, elem_tags, elem_node_tags = model.mesh.getElements(dim, ent)
elements = []
el_tags = []
for k, element_list in enumerate(elem_tags):
el_name, _, _, numv, _, _ = model.mesh.getElementProperties(
elem_types[k])
if el_name == "Point":
continue
elem_type = gmsh_map[el_name]
for j, eltag in enumerate(element_list):
if eltag in el_tags:
continue
el_tags.append(eltag)
nodes = []
for i in range(numv):
idtag = numv * j + i
p1 = elem_node_tags[k][idtag]
nodes.append(fem.nodes.from_id(p1))
new_nodes = node_reordering(elem_type, nodes)
if new_nodes is not None:
nodes = new_nodes
el = Elem(eltag, nodes, elem_type, parent=fem)
elements.append(el)
return elements
def test_negative_sec_contained(self):
# A minor change in section box thickness
sec = Section("myBG", from_str="BG800x400x20x40")
mat = Material("my_mat")
bm = Beam("my_beam", (0, 0, 0), (1, 0, 0), sec, mat)
elem = Elem(1, [bm.n1, bm.n2], "B31")
fem_set = FemSet("my_set", [elem], "elset")
fem_sec = FemSection("my_sec", "beam", fem_set, mat, sec)
p = get_fsec_bm_collection()
self.assertFalse(fem_sec in p.fem.sections)
def test_negative_mat_contained(self):
# A minor change in material property (S420 instead of S355)
sec = Section("myBG", from_str="BG800x400x30x40")
mat = Material("my_mat", CarbonSteel("S420"))
bm = Beam("my_beam", (0, 0, 0), (1, 0, 0), sec, mat)
elem = Elem(1, [bm.n1, bm.n2], "B31")
fem_set = FemSet("my_set", [elem], "elset")
fem_sec = FemSection("my_sec", "beam", fem_set, mat, sec)
p = get_fsec_bm_collection()
self.assertFalse(fem_sec in p.fem.sections)
def add_hinge_prop_to_elem(elem: Elem, members, hinges_global, xvec,
yvec) -> None:
"""Add hinge property to element from sesam FEM file"""
from ada.fem.elements import Hinge, HingeProp
if len(elem.nodes) > 2:
raise ValueError(
"This algorithm was not designed for more than 2 noded elements")
for i, x in enumerate(members):
if i >= len(elem.nodes):
break
if x == 0:
continue
if x not in hinges_global.keys():
raise ValueError("fixno not found!")
opt, trano, a1, a2, a3, a4, a5, a6 = hinges_global[x]
n = elem.nodes[i]
if trano > 0:
csys = None
else:
csys = Csys(
f"el{elem.id}_hinge{i + 1}_csys",
coords=([
unit_vector(xvec) + n.p,
unit_vector(yvec) + n.p, n.p
]),
parent=elem.parent,
)
dofs_origin = [1, 2, 3, 4, 5, 6]
dofs = [
int(x) for x, i in zip(dofs_origin, (a1, a2, a3, a4, a5, a6))
if int(i) != 0
]
end = Hinge(retained_dofs=dofs, csys=csys, fem_node=n)
if i == 0:
elem.hinge_prop = HingeProp(end1=end)
else:
elem.hinge_prop = HingeProp(end2=end)
def test_negative_contained_shell_(self):
# Testing equal operator for change in element type
mat = Material("my_mat")
elem = Elem(1, [
Node((0, 0, 0)),
Node((1, 0, 0)),
Node((1, 1, 0)),
Node((0, 1, 0))
], "S4")
fem_set = FemSet("my_set", [elem], "elset")
fem_sec = FemSection("my_sec", "shell", fem_set, mat, thickness=0.01)
p = get_fsec_sh_collection()
self.assertFalse(fem_sec in p.fem.sections)
def part_with_shell():
p = Part("my_part")
mat = Material("my_mat")
elem = Elem(
1,
[Node((0, 0, 0)),
Node((1, 0, 0)),
Node((1, 1, 0)),
Node((0, 1, 0))], "quad")
fem_set = FemSet("my_set", [elem], "elset")
fem_sec = FemSection("my_sec", "shell", fem_set, mat, thickness=0.01)
for n in elem.nodes:
p.fem.nodes.add(n)
p.fem.elements.add(elem)
p.fem.sets.add(fem_set)
p.fem.sections.add(fem_sec)
return p
def get_nodes_and_elements(gmsh, fem=None, fem_set_name="all_elements"):
"""
:param gmsh:
:type gmsh: gmsh
:param fem:
:type fem: ada.fem.FEM
:param fem_set_name:
:type fem_set_name: str
"""
from ada.fem import FEM
fem = FEM("AdaFEM") if fem is None else fem
nodes = list(gmsh.model.mesh.getNodes(-1, -1))
# Get nodes
fem._nodes = Nodes(
[
Node(
[roundoff(x) for x in gmsh.model.mesh.getNode(n)[0]],
n,
parent=fem,
) for n in nodes[0]
],
parent=fem,
)
# Get elements
elemTypes, elemTags, elemNodeTags = gmsh.model.mesh.getElements(2, -1)
elements = []
for k, element_list in enumerate(elemTags):
face, dim, morder, numv, parv, _ = gmsh.model.mesh.getElementProperties(
elemTypes[k])
elem_type = gmsh_map[face]
for j, eltag in enumerate(element_list):
nodes = []
for i in range(numv):
idtag = numv * j + i
p1 = elemNodeTags[k][idtag]
nodes.append(fem.nodes.from_id(p1))
el = Elem(eltag, nodes, elem_type, parent=fem)
elements.append(el)
fem._elements = FemElements(elements, fem_obj=fem)
femset = FemSet(fem_set_name, elements, "elset")
fem.sets.add(femset)