Introduction to Smart Materials
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The document provides an overview of smart materials and their engineering applications, including shape memory alloys (SMAs), magnetorheological (MR) fluids, and piezoelectric materials. It discusses their properties, functionalities such as vibration damping and energy conversion, and specific uses in various fields like dental fillings and actuators. The potential for creating smart structures through the control of material properties is emphasized.
Introduction to Smart Materials
- 1. Smart Materials and their Applications in Engineering Smart Structures Mohammad Tawfik #WikiCourses Dr. Mohammad Tawfik Http://WikiCourses.WikiSpaces.com
- 2. • Controlled change in properties – Change in mechanical properties (MR fluids, SMA) – Change in geometry (Piezoelectric, SMA) • Energy Converters! – Mechanical Electrical (Piezoelectric) – Heat Mechanical (SMA) – Mechanical Heat (Viscoelastic) – Etc… Smart Structures Mohammad Tawfik Smart Material: What? #WikiCourses Http://WikiCourses.WikiSpaces.com
- 3. • Vibration Damping • Shape Control • Noise Reduction • Vibration/Damage Sensing • Heat Sensing Smart Structures Mohammad Tawfik Smart Materials: Why? #WikiCourses Http://WikiCourses.WikiSpaces.com
- 4. Smart Structures Mohammad Tawfik Smart Structures: Classification #WikiCourses Wada, Fanson, and Crawly Http://WikiCourses.WikiSpaces.com
- 5. Magnetorheological Fluids Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com
- 6. Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com MR Fluids How do they work? • Externally applied magnetic field in a direction normal to the fluid flow direction form dipoles in the iron particles • Magnetic poles start attracting each others to the direction of the field, hence forming chains • The chains then form a skeleton within the fluid, which gains the fluid controllable yield stress
- 7. General purpose oil Smart Structures Mohammad Tawfik Why MR technology? #WikiCourses Mix them and you are Http://WikiCourses.WikiSpaces.com done! Required Materials to synthesize an MR fluid: • Lithium grease Micron-sized iron particles
- 8. Smart Structures Mohammad Tawfik #WikiCourses MR Fluids Http://WikiCourses.WikiSpaces.com
- 9. Smart Structures Mohammad Tawfik Rabinow and Winslow 1950’s #WikiCourses Http://WikiCourses.WikiSpaces.com
- 10. Smart Structures Mohammad Tawfik #WikiCourses MR Damper Fabrication Http://WikiCourses.WikiSpaces.com Prototype Damper
- 11. Smart Structures Mohammad Tawfik Seat Shock Absorbers #WikiCourses Http://WikiCourses.WikiSpaces.com
- 12. Smart Structures Mohammad Tawfik Seat Shock Absorbers #WikiCourses Http://WikiCourses.WikiSpaces.com
- 13. Shape Memory Alloy Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com
- 14. • Change mechanical properties with the change of temperature • Regain original shape when heated! Smart Structures Mohammad Tawfik Shape Memory Alloy #WikiCourses Http://WikiCourses.WikiSpaces.com
- 15. Smart Structures Mohammad Tawfik Shape Memory Alloys #WikiCourses Http://WikiCourses.WikiSpaces.com
- 16. Smart Structures Mohammad Tawfik Shape Memory Alloys #WikiCourses Http://WikiCourses.WikiSpaces.com
- 17. Smart Structures Mohammad Tawfik #WikiCourses Application Http://WikiCourses.WikiSpaces.com
- 18. Smart Structures Mohammad Tawfik #WikiCourses SMA Embedding Http://WikiCourses.WikiSpaces.com
- 19. Smart Structures Mohammad Tawfik Other Applications #WikiCourses Http://WikiCourses.WikiSpaces.com • Dental Fillings • Artificial Joints • Heat Valves • Eye-glasses!
- 20. Smart Structures Mohammad Tawfik Shape Memory Alloys #WikiCourses Http://WikiCourses.WikiSpaces.com
- 21. Smart Structures Mohammad Tawfik Shape Memory Alloys #WikiCourses Http://WikiCourses.WikiSpaces.com
- 22. Piezoelectric Materials Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com
- 23. • Electric Field Mechanical Strain : Actuator • Mechanical Stresses Electrical Potential Field : Sensor Smart Structures Mohammad Tawfik Piezoelectric Material #WikiCourses Http://WikiCourses.WikiSpaces.com
- 24. Smart Structures Mohammad Tawfik #WikiCourses Basic Properties Http://WikiCourses.WikiSpaces.com
- 25. Smart Structures Mohammad Tawfik Piezo-Fiber Composites #WikiCourses Http://WikiCourses.WikiSpaces.com
- 26. Smart Structures Mohammad Tawfik Active/Macro Fiber Composites #WikiCourses Http://WikiCourses.WikiSpaces.com
- 27. Smart Structures Mohammad Tawfik Energy Harvesters #WikiCourses Http://WikiCourses.WikiSpaces.com
- 28. Smart Structures Mohammad Tawfik MEMS Power Generation #WikiCourses Http://WikiCourses.WikiSpaces.com
- 29. Smart Structures Mohammad Tawfik Backpack Power Generator #WikiCourses Http://WikiCourses.WikiSpaces.com
- 30. Ionic Polymer Metal Composite Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com IPMC
- 31. • New Material • Shape is controlled by electric field • Designed on the molecule level (NANO technology) Smart Structures Mohammad Tawfik #WikiCourses IPMC Http://WikiCourses.WikiSpaces.com
- 32. Smart Structures Mohammad Tawfik #WikiCourses Slow and Fast! Http://WikiCourses.WikiSpaces.com
- 33. Thank you for your attention! [email protected] Smart Structures Mohammad Tawfik #WikiCourses Http://WikiCourses.WikiSpaces.com