6th Edition of International Conference on

Materials Science and Engineering

March 18-20, 2024 | Singapore

Materials 2022

Hui Li

Speaker at Materials Science and Engineering 2022 - Hui Li
Northeastern University, China

Title : Vibration and damping study of multifunctional grille composite sandwich plates with an IMAS design approach


In the present study, an integrated material and structure (IMAS) design approach is proposed for fabrication of a multifunctional grille composite sandwich plate. It consists of two panels made of carbon fiber/resin polymer (CFRP) and one grille functional core that includes several grid frame beams (GFBs) and grille functional units (GFUs) via falcon riveting connections to achieve vibration sensing and damping control functions. In each GFU, it is composed of a rectangular grille (RG) and several embedded functional materials with 4-layer laminates, including a piezoelectric sensing layer, an upper copper wire layer, a magnetorheological elastomer (MRE) layer and a lower copper wire layer. To investigate the free vibration and damping characteristics of such a highly integrated sandwich structure, an analytical model is proposed that is based on the complex modulus method, the polynomial expansion approach, the improved Rayleigh-Ritz method, etc. After the natural frequencies, modal shapes and damping parameters are successfully solved, with results from literature being employed to roughly validate the model developed. Meanwhile, the dynamic experiments with different internal magnetic field distribution patterns and intensities of MRE are undertaken to give a further validation of the present model. Finally, the parameter analysis is carried out and some important conclusions are summarized to better exert active and passive vibration suppression performance of the CFRP-GFB-GFU plate.

What will audience learn from your presentation

(1) An integrated material and structure design approach is proposed for fabrication of a multifunctional grille composite sandwich plate?
(2) A dynamic model of the multifunctional grille composite sandwich plates is proposed to predict the free vibration and damping characteristics;
(3) Numerical and experimental validation are conducted to prove the effectiveness of the present model;
(4)The parametric study is conducted to achieve some new analysis findings, which provides the important reference for better exerting vibration suppression performance of this highly integrated multifunctional sandwich plate.



Hui Li is an associate professor in Northeastern University, China. He has published more than more than 70 research articles in SCI/ EI journals and 60 Chinese invention patents, including 30 top-level SCI papers in Compos Sci Technol, Compos. B. Eng, Mech Syst Signal Process, Nonlinear Dyn., etc. He once was a vibration engineer in Shenyang Machine Tool Co, Ltd, a postdoctoral fellow at Shenyang Engine Research Institute, and a visiting scholar in Liverpool University and Hanyang University. His research interest includes: nonlinear vibration, vibration and impact modeling, dynamic thermal evaluation of porous, hybrid and multifunctional composite materials and structures.