报告题目1： Laminate theory and application of elasto-magneto-electric materials：Theory
报告题目2：Laminate theory and application of elasto-magneto-electric materials：Application
报告人： Prof. John Huber (University of Oxford)
Theory: The formation of a composite mixes together materials to give averaged material properties, but also allows the generation of new materials with properties that were not present in any of the parent phases. This talk motivates research on laminates through a discussion of microstructure in ferroelectric materials and will show how the linear properties of laminates can be derived using classical theory of homogenization.
Application: following a brief review of the underlying theory, the talk explores some of the possibilities for forming materials with desirable elastic or electromagnetically coupled properties. Milton and Cherkaev showed  that, given sufficiently extremal but isotropic starting materials, a homogenized composite could achieve any elastic tensor within the bounds imposed by thermodynamics. We explore the use of isotropic and anisotropic starting materials combined with layering and rotation for the generation of materials with features such as auxeticity. We further explore composites with tailored piezoelectric and magnetoelectric properties. It is well-known that the magnetoelectric effect can be generated in composites where none of the parent phases are themselves magnetoelectric. We discuss combinations of layered materials that can achieve enhanced performance and explore the limits of performance.
John Huber, associate professor from department of engineering science in University of Oxford. He received his master (Engineering) and doctor degrees (Mechanics of Materials) in University of Cambridge on 1995 and 1998, respectively. His research interests include: mechanics of materials, functional Materials, electroceramics, piezoelectrics, ferroelectrics, actuators and sensors, micro and nanoscale materials characterization by scanning probe microscopy. Prof. Huber is also the Associate Editor of European Journal of Mechanics A/Solids; Chair/Co-chair of ASME symposia on active materials, behavior and mechanics; Member of ASME technical committee for active and multifunctional materials; Fellow of the Higher Education Academy.