Functions

 input = InputStruct()

Create a dynamic structure for FEM parameters

    assemble_cell_3D!( ke_n, fe_int::Vector, cell, cv, input::InputStruct, ue)

This function assembles local internal force and tangent stiffness for 3D

   assemble_cell_plane_strain!( ke_n, fe_int, cell, cv, input, ue)

This function assembles local internal force and tangent stiffness for plane strain

   assemble_cell_plane_stress!(ke_n, fe_int, cell, cv, input, ue)

This function assembles local internal force and tangent stiffness for plane stress

  assemble_global_3D!(K_nonlinear, F_int, dh, cv, input, u)

This function assembles global internal force and tangent stiffness for 3D

   assemble_global_plane_strain!(K_nonlinear, F_int, dh, cv, input, u)

This function assembles global internal force and tangent stiffness for plane strain

   assemble_global_plane_stress!(K_nonlinear, F_int, dh, cv, input, u)

This function assembles global internal force and tangent stiffness for plane stress

assemble_traction_forces_threeD!(F_ext, dh::DofHandler{3},facetsets::Vector, 
facetvalues::FacetValues, tractions::Dict{Int, <:AbstractVector}, u::AbstractVector)

This function assembles the external force from traction for 3D

assemble_traction_forces_twoD!(F_ext, dh,  facetsets::Vector,  facetvalues,  
tractions::Dict{Int, <:AbstractVector}, u::AbstractVector)

This function assembles the external force from traction for 2D plane stress and plane strain

   canonical_quad(t)

Canonicalize a quad (4 node indices) so that rotations/reversals map to the same key. This ensures internal faces (shared by 2 cells) are counted correctly.

canonical_tri(t)

Canonical form for a triangle (handles rotations + reversal = 6 cases)

get_boundary_faces(grid , Ferrite.Hexahedron)

Function to get faces at the boundary for Ferrite.Hexahedron

get_boundary_faces_tet(grid,  Ferrite.Tetrahedron)

Function to get faces at the boundary for Ferrite.Tetrahedron

 get_faces(cell)

function to extract all quadrilateral faces from hexahedral cells

initialize_solver([maxIterPerInc=500], [totalTime=1.0], [initInc=0.1],
                  [minInc=1e-5], [maxInc=0.2], [totalInc=500])

Initialize solver parameters for a time integration procedure.

run_fem(input)

the general fem runner for all cases 2D & 3D

run_plane_strain(input)

run finite element for 2D plane strain

 run_plane_strain_disp(input)

run finite element for plane stain with displacement load

run_plane_stress(input)

run finite element for plane stress

run_plane_stress_disp(input)

run finite element for plane stress with displacement load

run_threeD(input)

run finite element for 3D

run_threeD_disp(input)

run finite element code for 3D with displacement load

solve_lambda3(F2d, input; tol=1e-10, maxit=25)

This functions finds F33 in plane stress

tetfacesas_tuples(cell)

function to get faces for the tet4 element

to_boundary(grid, facets, Faces,Ferrite.Hexahedron)
or
to_boundary(grid, facets, Faces, Ferrite.Tetrahedron)

Convert boundary facets from a Ferrite grid to 3D point coordinates for plotting.

  to_boundary(grid, facets, Faces,Ferrite.Quadrilateral)

or to_boundary(grid, facets, Faces,Ferrite.Triangle)

Convert boundary facets from a Ferrite grid to 2D point coordinates for plotting.

to_boundary(grid, nodeset, Nodes, Ferrite.Hexahedron) 
or 
to_boundary(grid, nodeset, Nodes, Ferrite.Tetrahedron)

Convert a set of node indices from a Ferrite grid to 3D point coordinates for plotting.

to_boundary(grid, nodeset, Nodes, Ferrite.Quadrilateral )

or

to_boundary(grid, nodeset, Nodes, Ferrite.Triangle )

Convert a set of node indices from a Ferrite grid to 2D point coordinates for plotting.

 to_geometry(grid, Ferrite.Hexahedron)

Convert a Ferrite Hexahedron grid to GeometryBasics-compatible vertices and faces for plotting.

to_geometry(grid,Ferrite.Quadrilateral)

Convert a Ferrite Quadrilateral grid to GeometryBasics-compatible vertices and faces for plotting.

to_geometry(grid, Ferrite.Tetrahedron)

Convert a Ferrite Hexahedron grid to GeometryBasics-compatible vertices and faces for plotting.

to_geometry(grid, Ferrite.Triangle)

Convert a Ferrite triangular grid to GeometryBasics-compatible vertices and faces for plotting.