material elastic [ name = steel rho = 7800 # density E = 2.1e11 # young's modulus nu = 0.3 # poisson's ratio ] model_solver solid_mechanics_model [ time_step_solver implicit [ type = dynamic non_linear_solver implicit [ type = newton_raphson_modified max_iterations = 15 tolerance = 1e-7 ] integration_scheme displacement [ type = trapezoidal_rule_2 ] ] ]