In The Name of GOD

Sharif University of Technology

Department of Aerospace Engineering

Advanced Aerospace Structural Design

Aero-45925

Instructor

Hassan Haddadpour (Haddadpour@sharif.edu)

Objectives

The course is structured to provide a thorough understanding of the different design concerns, loads, and analysis techniques that are associated with light-weight air vehicle (aircraft, helicopters) and space vehicles (launch vehicles, spacecraft). The course builds upon a student ability to apply principles of mathematics, strength of materials, and structural mechanics to design and analyze aerospace structural components, assemblies and systems.

Topics

1) Introduction

· History of Aerospace Structures

· Role and Layout of Structural Members

· Structural Design Processes

· Airworthiness Targets

· Structural Design Requirements

2) Loading

· Flight Maneuver Loads

· Loads Due to Atmospheric Turbulence

· Ground Loads

· Loading on Individual Airframe Components

· Load Distribution

3) Materials

· Mechanical and Physical Property of Aerospace Materials

· Toughness and Crack Growth Rate

· Criteria and Selection of Material

4) Failure Analysis

· Failure Criteria for Steady and Variable Loading

· Cumulative Fatigue Damage

· Repeated Load Data

5) Structural Instability

· Buckling of Beams

· Crippling Stresses

· Buckling of Simple, Curved and Stiffened Panels

· Combined Loadings

6) Cutouts

· Lightly Loaded Beams

· Heavily Loaded Beams

· Cutouts in Skin-Stringer Panels

7) Initial Sizing of Aerospace Structure Members

· Box Beam of Lifting Surface

· Fuselage

· Ribs, Frames and Bulkheads

· Pressure Vessels

8) Structural Joints

· Rivets

· Bolts and Screws

· Fastener Selection

· Lug Joints

· Welded And Adhesive Bond

Grading

The final grade will be calculated as follows:

· Homeworks (30%)

· Design Project (30%)

· Final Exam (40%)

Outcomes

Students who successfully complete the course will demonstrate the following outcomes:

· Become familiar with aerospace structures and the corresponding loading

· An ability to function on multidisciplinary teams

· Explain the basic considerations of structural design

· Design/specify a structural configuration using basic structural elements in order to meet specified need

Related Web Sites

http://adg.stanford.edu/aa241/AircraftDesign.html

http://www.aoe.vt.edu/aoe/faculty/Mason_f/SD1.html

http://roger.ecn.purdue.edu/~weisshaa/aae451/index.html

http://www.darcorp.com

http://www.aircraftdesign.com

Textbook

There is no textbook published today which covers all of the needed items as we would like. Therefore, the topic material as presented in lecture constitutes the core of the course.  In addition the following textbook can be used for the course

Michael C. Y. Niu, Airframe Structural Design: Practical Design Information and Data on Aircraft Structures, Conmilit Press Ltd, 1999. 

Furthermore, these books serve as more permanent and referable material than class notes:

1. Denis Howe Aircraft Loading and Structural Layout, John Wiley & Sons, 2004.

2. Michael C. Y. Niu, Airframe Stress Analysis and Sizing, Conmilit Press Ltd, 2001. 

3. T.H.G. Megson, Aircraft structures for engineering students, Edward Arnold, 1990.

4. Perry D. J., Azar, J. J., Aircraft Structures, McGraw-Hill, 1982.

5. Bruhn, Analysis & Design of Flight Vehicle Structures, Jacobs & Associates, Inc. 1973. 

6. Ted L. Lomax, Structural Loads Analysis for Commercial Transport Aircraft: Theory and Practice, AIAA Education Series, 1996.

Report Formats

· Homeworks’ Format

· Final Project Format

Homeworks

· Homework1

Free Downloads

· JAR -VLA

· JAR-23