Initial state variables

This subroutine is used to initialize user-defined state variables (statev) at particular material points (integration points), characterized by the parameter user on the *initial conditions command in the input file: *initial conditions, type = state variables, user

Linux

subroutine user_initial_state_variables(ie,igp,ndim,nstatev,nchar,material, &
             coords,statev) bind(c,name='user_initial_state_variables')
  use, intrinsic :: iso_c_binding
  implicit none
  integer(c_int)                    , intent(in)    :: ie         
  integer(c_int)                    , intent(in)    :: igp         
  integer(c_int)                    , intent(in)    :: ndim         
  integer(c_int)                    , intent(in)    :: nstatev     
  integer(c_int)                    , intent(in)    :: nchar 
  character(c_char)                 , intent(in)    :: material(*) 
  real(c_double), dimension(3)      , intent(in)    :: coords      
  real(c_double), dimension(nstatev), intent(inout) :: statev      

  character(len=nchar) :: material_str

  ! required to make the material name usable in select case of if-clauses
  material_str = transfer(material(1:nchar), material_str)

  ... user coding

end subroutine user_initial_state_variables

Windows

subroutine user_initial_state_variables(ie,igp,ndim,nstatev,nchar,material,coords,statev)
  implicit none
    !DEC$ ATTRIBUTES DLLEXPORT, STDCALL, REFERENCE :: user_initial_state_variables
  implicit none
  integer                    , intent(in)    :: ie         
  integer                    , intent(in)    :: igp         
  integer                    , intent(in)    :: ndim         
  integer                    , intent(in)    :: nstatev     
  integer                    , intent(in)    :: nchar 
  character                  , intent(in)    :: material(*) 
  real(8), dimension(3)      , intent(in)    :: coords      
  real(8), dimension(nstatev), intent(inout) :: statev      

  character(len=nchar) :: material_str

  ! required to make the material name usable in select case of if-clauses
  material_str = transfer(material(1:nchar), material_str)

  ... user coding

end subroutine user_initial_state_variables

ie: Element label (id)
igp: Integration point number in the element
ndim: Number of coordinates
nstatev: Number of solution-dependent state variables (depends on the material)
nchar: length of the material name
material: Material name assigned to the current element
coords(:): Array containing the coordinates of the current integration point
statev(:): Array containing the solution-dependent state variable to be defined