About the Lecturer

Mr. Xu Yangguang, Ph.D. in Solid Mechanics, is an associate research fellow of the Institute of Systems Engineering, China Academy of Engineering Physics, and a graduate (masters) supervisor. He received his bachelor’s, master’s and doctorate degrees at the University of Science and Technology of China and served as a postdoctoral fellow at King Abdullah University of Science and Technology in Saudi Arabia. At present, he is engaged in the researches on nonlinear viscoelastic behavior of smart polymer materials, design of structural polymer composites and mechanism of vibration reduction and impact resistance.

About the Lecture

Magnetorheological plastomer (MRP) belongs to a class of novel magneto-sensitive smart materials, which is prepared through the dispersion of micro-sized soft magnetic particles into plastic polymer matrixes. This lecture will discuss under the driving force of external magnetic field the correlation mechanism between ferromagnetic particles’ microstructure evolution and their macroscopic mechanical properties in magnetorheological plastomers. In laboratory, tests have been performed to systematically study the variation of mechanical/electrical properties of magnetorheological plastomers with that of external magnetic field. On the other hand, a theoretical model of particle size is developed in accordance with the theories of molecular dynamics to describe the evolution of magnetostrictive microstructure of magnetic particles. The results show that the higher the degree of orderliness for particle chain segments, the lower the magnetic potential energy of the whole particle system, and the more stable the material system of magnetorheological plastomer, which are consistent with the principle of energy minimization.