Material and Geometric Properties
of the Boeing 767-200ER
Oscar Ardila
Civil Engineering
Purdue University
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
Plane Parts Modeling
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
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)
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
Plane Parts Modeling
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
Empty Weight of the B767-200ER
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
Mass Contribution of Most Relevant Parts
Structural Elements
Others:

Wing Structure (12%)
Ribs: 4600 Kg
Spars: ~5000 Kg

Skin (25%)
Fuselage: ~12000 Kg
Wings and Tail: 8500 Kg

Fuselage Structure (13%)
Rings: 6300 Kg
Ribs: ~5000 Kg

Engines (10%)
Core: ~7500 Kg (2 engines)
Fan and Housing: 1200 Kg

Floor Supports (8%)
Floor beams: ~1500 Kg
Longitudinal supports: 5600 Kg
Empty Weight of the B767-200ER
Additional Mass Contributions

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