embedded_interface truc [
  name = reinforcement
  material = elastic_r
  points = [[0, 0.5], [1, 0.5]]
]

material reinforcement elastic [
  name = elastic_r
  E = 1
  area = 1
]

material elastic [
  name = truc
  rho = 0
  E = 0
  nu = 0
]

user parameters [
  height = 0.5
]