embedded_interface truc [
  name = reinforcement
  material = elastic_r
  points = [[0, 0.25, 0.75], [10, 0.25, 0.75]]
]

material reinforcement elastic [
  name = elastic_r
  E = 210e9
  area = 1e-2
  pre_stress = 1e6
]

material elastic [
	 name = concrete
	 rho = 2500   # density
	 E   = 30e9   # young's modulus
	 nu  = 0.0    # poisson's ratio
   Plane_Stress = true
]