material elastic [
         name = bot_body
         rho = 1.0   # density
         E   = 1.0   # young's modulu
         nu  = 0.    # poisson's ratio
]

material elastic [
         name = top_body
         rho = 1.0   # density
         E   = 1.0   # young's modulu
         nu  = 0.    # poisson's ratio
]

contact_detector [
  type = explicit		 			
  two_pass_algorithm = false
]

contact_resolution penalty [
  name = contact_bottom	   
  slave = contact_bottom
  master = contact_bottom
  mu = 0.0
  epsilon = 100.0
  epsilon_t = 100
  two_pass_algorithm = false
]