modularize…

material.dat
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			model solid_mechanics_model_cohesive [
			cohesive_inserter [
			cohesive_zones = [btop, bbottom]
			]

			material elastic [
			name = btop
			rho = 1e3 # density
			E = 1e3 # young's modulus
			nu = 0.0 # poisson's ratio
			]

			material elastic [
			name = bbottom
			rho = 1e3 # density
			E = 1e3 # young's modulus
			nu = 0.0 # poisson's ratio
			]

			material cohesive_linear [
			name = tg_cohesive
			beta = 0
			G_c = 10
			sigma_c = 100
			]

			material cohesive_linear [
			name = ig_cohesive
			beta = 0
			G_c = 10
			sigma_c = 20
			]
			]