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material_stiffness_reduction.dat
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			seed = 1

			material iterative_stiffness_reduction [
			name = damage_mat
			rho = 2.7e-9 # density
			E = 12.e9 # young's modulus
			nu = 0.3 # poisson's ratio
			Sc = 2.9e6
			prescribed_dam = 0.1
			dam_tolerance = 1.e-16
			max_damage = 0.9999
			Gf = 20
			crack_band_width = 0.5
			max_reductions = 10
			]

			material elastic [
			name = inclusion
			rho = 2.7e-9 # density
			E = 60e9 # young's modulus
			nu = 0.3 # poisson's ratio
			]

			material igfem_iterative_stiffness_reduction [
			name = test_mat_igfem
			name_sub_mat_1 = inclusion
			name_sub_mat_2 = damage_mat
			]