material elastic [
	 name = bulk
	 rho = 2500
	 E = 42.e9
	 nu = 0.2
]

material cohesive_linear [
	 name = cohesive
	 beta = 1
	 G_cI = 100
	 G_cII = 100
	 sigma_c_generator = uniform(1) 300e6 330e6
]