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Published byLorraine Poole Modified over 9 years ago
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Material and Geometric Properties of the Boeing 767-200ER Oscar Ardila Civil Engineering Purdue University
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Objectives Define material properties for the different parts included in the LS-Dyna B767 model Assign section properties to beam and shell elements in the plane model Include mass contribution due to non-structural components not modeled
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Plane Parts Modeling Element types used in the B767 model: Element types used in the B767 model: Fuselage and wing skin, ribs and spars (wings, tail), passenger cabin floor, etc, are modeled using shell elements
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Plane Parts Modeling Element types used in the B767 model : Floor supports, as well as fuselage rings and ribs are modeled using beam elements Engine core and landing gear are modeled with solid elements (hexahedrons)
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Plane Parts Modeling Sectional Properties of Elements: Limitations on available information regarding structural details of plane components make it difficult to define accurately beam element section dimensions and shell element thickness Selected values must reflect the actual mass and stiffness distribution of the plane structure
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Materials used in the B767 model: Most of the components of the plane structure are made of aluminum: fuselage and wing skin, ribs and spars, floor beams, fuselage rings Engine core, landing gear supports, and skin at the regions where the fuselage meets the wings and the tail are modeled as titanium parts No important use of steel for part modeling Plane Parts Modeling
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General Information Target Mass: 83300 Kg Purdue B767 Model Mass: ~83000 Kg Major mass contributions come from the engines (core), fuselage (skin, rings and ribs) and wings (skin, ribs and spars) Empty Weight of the B767-200ER
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Empty Weight of the B767-200ER Mass Contribution of Most Relevant Parts Empty Weight of the B767-200ER Mass Contribution of Most Relevant Parts Structural Elements Wing Structure (12%) Ribs: 4600 Kg Spars: ~5000 Kg Fuselage Structure (13%) Rings: 6300 Kg Ribs: ~5000 Kg Floor Supports (8%) Floor beams: ~1500 Kg Longitudinal supports: 5600 Kg Others: Skin (25%) Fuselage: ~12000 Kg Wings and Tail: 8500 Kg Engines (10%) Core: ~7500 Kg (2 engines) Fan and Housing: 1200 Kg
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Some elements not included in the model make important contributions to the total mass of the plane: A/C Units: ~1500 Kg Doors: ~1500 Kg Overhead bins: 1000 Kg Cargo containers and seats: >3000 Kg This mass is included in the model by assigning uniform non-structural mass to the floor shell elements Empty Weight of the B767-200ER Additional Mass Contributions
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