Akademik Veri Yönetim Sistemi
Earth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Long Beach, CA, Amerika Birleşik Devletleri, 3 - 05 Mart 2008, cilt.323
Uncontained aircraft engine failure can cause catastrophic damaging effects to aircraft systems if not addressed in the aircraft design. Mitigating the damaging effects of uncontained engine failure and improving the numerical modeling capability of these uncontained engine events are crucial. In this paper, high strain rate material behavior of one of the most extensively used materials in the aircraft industry is simulated and compared against ballistic impact tests. Ballistic limits are evaluated by utilizing explicit Finite Element (FE) simulations based on the corresponding ballistic impact experiments. LS-DYNA is used as a non-linear explicit dynamics FE code for the simulations. Johnson-Cook material model is employed as a thermo visco-plastic material model coupled with a non-linear equation-of-state and an accumulated damage evaluation algorithm for the numerical simulations. Predictive performance of the numerical models is discussed in terms of the material characterization efforts, material model parameter sensitivities and mesh sensitivities.