Design Philosophy

[Pages:55]Design Philosophy

Class Objectives

? Clear understanding of design, analysis, and validation requirements for aircraft structures

? Exposure to Structures Engineering processes and tools

Design and Analysis of Aircraft Structures

4-2

Lifetime Safety Cycle

Boeing design requirements

Regulatory requirements

? Manufacturer ? Operator ? Civil aviation authorities

Delivery

Design

? Operate ? Maintain

Produce

Validate and certify

In-service operation

Continuous feedback of information

Design and Analysis of Aircraft Structures

4-3

Safety Wheel

Design requirements and objectives

Typical safety subject

Final drawings

Federal Aviation Regulation standards

Design and Analysis of Aircraft Structures

4-4

Sources of Design Criteria

Airlines

Boeing

Regulatory agencies (including FAA)

Design and Analysis of Aircraft Structures

4-5

Safety Requires Diligent Performance by All Participants

Manufacturers

Design analysis, test and continued

verification

Regulatory actions

Airworthiness authorities

Maintenance and

inspection

Operators

Design and Analysis of Aircraft Structures

4-6

Principal Guidance Documents

Design and Analysis of Aircraft Structures

4-7

Structural Design Criteria Consist of Ten Major Elements

Design loads

Environment/ Discrete events

Material/Fastener Stiffness and flutter

Maintainability

? Repairability ? Inspectability

Producibility

Structures Design Criteria

Static strength

Crashworthiness

Durability

? Fatigue

? Corrosion

Damage Tolerance/

Residual Strength/

Fail Safety/Safe Life

Design and Analysis of Aircraft Structures

4-8

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