In The Name of GOD                      

 

Sharif University of Technology

Department of Aerospace Engineering

 
 

 

 


Aerospace Structural Design

Aero-45137

 

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 material is presented for the design and analysis of "minimum-weight" structures, so that applications to other structural systems can easily be drawn. 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. The design project emphasizes functioning in teams to design (build and test if possible) aerospace structural components, whereas the homework assignments, project reports and presentations build skills in written and verbal communication. The aspects of professional responsibility and ethics are emphasized through classroom discussions relating to real world applications.

 

Topics

1)     Introduction

        ·          History of Aerospace Structures

        ·          Design Organizations

        ·          Structural Design Processes

2)     Loading

        ·          V-n Diagram

        ·          Wing Loads

        ·          Tail Loads

        ·          Landing Loads

        ·          Fuselage Loads

3)     Materials

        ·          Mechanical and Physical Property of Materials

        ·          Toughness and Crack Growth Rate

        ·          Material Usage and Selection Procedures

4)     Failure Analysis

        ·          Principle Stresses

        ·          Failure Criteria for Steady and Variable Loading

        ·          Cumulative Fatigue Damage

5)     Structural Instability

        ·          Buckling of Beams

        ·          Crippling Stresses

        ·          Buckling of Panels and Stiffened Panels

6)     Design and Analysis of Typical Aerospace Structures

            ·      Review of Elasticity

        ·          Wing Design

        ·          Fuselage Design

        ·          Cut-out Design (in Spars and Ribs)

        ·          Pressure Vessel Design

7)     Structural Joints

        ·          General Information

        ·          Splices

        ·          Lug Joints

8)     Structural Dynamics and Aeroelasticity

        ·          Wing Divergence

        ·          Wing Flutter

 

Grading

The final grade will be calculated as follows:

·        Weekly home-work (15%)

·        Quizzes (10%)

·        Design project (20%)

·        Mid-Term Exam (20%)

·        Final Exam (35%)

 

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://www.hfdorna.com/

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

Although it is possible to follow the course by using the extensive class notes and any additional notes taken by students, it is suggested that students learn to refer to alternate sources. Furthermore, these books serve as more permanent and referencable material than class notes:

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

 

Other References

       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.