Piezoelectricity and Smart Structures — Lesson 4

This lesson covers the advanced material of piezoelectricity and its application in smart structures. It delves into the concept of smart structures, which are composite laminated structures integrated with smart materials like piezoelectric materials, magnetostrictive materials, or shape memory alloys. The lesson explains how these structures control vibration, deflect, and perform other desired functions. It also discusses the application of smart structures in aerospace, naval structures, automobiles, and space technology. The lesson further explores the mathematical models for analyzing these structures, the advantages and disadvantages of smart structures, and the concept of hybrid laminates. It concludes with a detailed explanation of the development of governing equations for piezoelectric shell modeling.

Video Highlights

04:15 - Advantages and disadvantages of smart structures.
06:11 - Concept of piezoelectricity and its discovery.
07:16 - Application of piezoelectricity in structural applications.
09:16 - Different types of piezoelectric materials.
14:04 - Constitutive relations for a piezoelectric material.
23:02 - 3-D solutions for a piezoelectric shell.
40:17 - 2-D shell theories for piezoelectric materials.

Key Takeaways

- Smart structures are composite laminated structures integrated with smart materials, which can control vibration, deflect, and perform other desired functions.
- These structures are extensively used in aerospace, naval structures, automobiles, and space technology.
- The mathematical models for analyzing these structures involve complex equations and require a deep understanding of the material's properties.
- Hybrid laminates, which integrate composite laminates with a piezoelectric layer, are known as smart structures or hybrid laminates.
- The development of governing equations for piezoelectric shell modeling is a complex process that requires a systematic approach.