material Ar metal
stress  linear
  modulus  0.00025e6
  possions_ratio 0.25
end
mass_density constant
  density 1.01202
end
body_force
end

material cubic metal
stress  cubic
  c11  0.00030e6
  c12  0.00010e6
  c44  0.00010e6
end
mass_density constant
  density 1.01202
end
body_force viscous
  gamma 1e0
end
end

material damped metal
stress  damped_cubic
  c11  0.00030e6
  c12  0.00010e6
  c44  0.00010e6
  gamma 0.1e3
end
mass_density constant
  density 1.01202
end
body_force
end