The resolved outer radius for stranded cores should account for compression. See rectstrands.jl for an example of area-preserving expansion.

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LineCableModels.jl/src/datamodel/circstrands.jl

Lines 86 to 87 in 2502c78

	r_ex = num_wires == 1 ? radius_wire : r_in + 2 * radius_wire # TODO: The resolved outer radius for stranded cores should account for compression. See rectstrands.jl for an example of area-preserving expansion.
	# Issue URL: https://github.com/Electa-Git/LineCableModels.jl/issues/32

println(circstrands.resistance)     # Outputs resistance in Ω/m

See also

• Material

• ConductorGroup

• calc_tubular_resistance

• calc_circstrands_gmr

• calc_helical_params
  """
  function CircStrands(
  r_in::T,
  radius_wire::T,
  num_wires::U,
  lay_ratio::T,
  material_props::Material{T},
  temperature::T,
  lay_direction::U,
  ) where {T <: REALSCALAR, U <: Int}

  rho = material_props.rho
  T0 = material_props.T0
  alpha = material_props.alpha
  r_ex = num_wires == 1 ? radius_wire : r_in + 2 * radius_wire # TODO: The resolved outer radius for stranded cores should account for compression. See rectstrands.jl for an example of area-preserving expansion.

  Issue URL: The resolved outer radius for stranded cores should account for compression. See rectstrands.jl for an example of area-preserving expansion. #32

  mean_diameter, pitch_length, overlength = calc_helical_params(
  r_in,
  r_ex,
  lay_ratio,
  )

  cross_section = num_wires * (π * radius_wire^2)

  R_wire =
  calc_tubular_resistance(0.0, radius_wire, rho, alpha, T0, temperature) *
  overlength
  R_all_wires = R_wire / num_wires

  gmr = calc_circstrands_gmr(
  r_in + radius_wire,
  num_wires,
  radius_wire,
  material_props.mu_r,
  )

  Initialize object

  return CircStrands(
  r_in,
  r_ex,
  radius_wire,
  num_wires,
  lay_ratio,
  mean_diameter,
  pitch_length,
  lay_direction,
  material_props,
  temperature,
  cross_section,
  R_all_wires,
  gmr,
  )
  end

const _REQ_CIRCSTRANDS = (:r_in, :radius_wire, :num_wires, :lay_ratio, :material_props)