Abstract
The ingestion of a bird into a jet engine is a serious threat to safety, and it is important for engine manufacturers to be able to predict the outcome of such events as accurately as possible. Material models are typically determined from experimental data. In many cases, these material properties vary with strain rate, temperature, and the stress state. In this work, a model of a generic titanium fan was created with industry collaboration to computationally investigate bird ingestion. The titanium fan blades used a tabulated version of a Johnson–Cook-type elastic–viscoplastic material model. A bird model is also presented and shown to have reasonable agreement with experimental data. From there, bird ingestion simulations were run under various conditions to investigate likely damage to the fan, as well as to report the stress state near the impact region. This work is intended to support material testing, to improve existing models, and to support future modeling efforts.
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