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Apr 26, 2012
Dynamic Loads in the Fan Containment Structure of a Turbofan Engine
Authors: Sunil K. Sinha [email protected] and Sreekanth Dorbala [email protected]Author Affiliations
Publication: Earth & Space 2008: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
In accordance with the FAA certification requirements, all modern commercial turbofan engines must successfully demonstrate its ability to withstand a Fan Blade-Out (FBO) event through actual test. Possibility of losing a rotating fan blade from a running engine is a flight safety consideration, which must be addressed during the design phase of the engine. A typical Fan Blade-Out event involves a very complex non-linear transient dynamics with large deflection of the release blade and large rotation of the trailing blade as well as progressive failure and fragmentation of various components. Given the high strain rates, the solution to the problem should also address dependence of material behavior via strain rates. In short, the transient dynamic analysis of a fan blade-out event highlights the complexity of the numerical technique, which includes all the nonlinearities of structural dynamics; plastic behavior of the materials, large displacements, and contact interaction between structural elements. In this paper, we present the results of a LS-DYNA simulation of a FBO (Fan Blade Out) event on a full-engine analytical model, which covers both the primary as well as secondary damage.
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© 2008 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Non-linear Dynamics, GE Aviation, Cincinnati, OH 45215,. E-mail: [email protected]
Engineering Analysis Center of Excellence, JFWTC, GE India Technology Center, Bangalore-560066, India,. E-mail: [email protected]
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