Smart Materials in Aerospace Industry

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AE2009 Aerospace Materials

Assignment Report

Use of Smart Materials in Aerospace Industry

List of Contents

1. Introduction 3

1. Purpose 4 2. Background 4 3. Scope 4

2. Types and Applications of Smart Materials

1. Piezoelectric Material 5 2. Shape Memory Alloys 14 3. Magnetostrictive Materials 20 4. Rheological Fluids 22

3. Discussion 25

4. Conclusion 26

5. References 27

Abstract

This report will cover the different types of smart materials, and their applications in the aerospace industry. An introduction is made with regards to the background and history of smart materials, after which 4 different types of smart materials are introduced. Within each subsection, we will draw a relationship between the properties of the smart material and its molecular mechanism. This is followed by presenting an outline of their recent and future applications, and the experimental procedures and results done in recent researches to show the feasibility of these applications. In the Discussion section, we will be delving into the cost-effectiveness and feasibility of using smart materials in aerospace components. Finally, the conclusion will give an insight into the relationship between the use of smart materials and the design of future aircrafts.

1. Introduction

Smart materials are defined as materials that can significantly change their intrinsic properties (mechanical, thermal, optical or electromagnetic), in a predictable and controlled manner in response to their environmental stimulus[1]. In general, these materials can be categorized into 3 categories, namely thermal-to-mechanical (shape memory alloys), electrical-to-mechanical (piezoelectric), and magnetic-to-mechanical (magnetostrictive).

Materials engineering has undergone a major transformation in the recent decade, as atoms and molecules are no longer viewed and worked upon on the microscopic level, but now on the nanometer level. Materials



References: [12] Hopkin M., Moses R., Zimcik D., Henderson D., Ryall T., Soangler R., “Active vibration suppression systems applied to twin tail buffeting”, 1998, Proceedings of the SPIE—The International Society for Optical Engineering, Vol. 3044, 413-420. [19] Provder, Theodore, “Smart coatings”, 2007 edition, Published by American Chemical Society [20] Radio Education and Research Center 2007, “The piezoelectric effect” [21] Smith, William Fortune, “Foundations of materials science and engineering”, 4th edition, 2006, Published by McGraw-Hill

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