Hong Kong Polytechnic University
Three-dimensional Negative Poisson’s Ratio Lattice Structures with Enhanced Load Bearing Capacity
Negative Poisson’s ratio (NPR) lattice structures exhibit unusual deformation behavior. They laterally contract, rather than expand, when compressed. The NPR lattice structures, especially those in 3D forms, have attracted considerable attention in recent years because of their intriguing mechanical properties and numerous promising applications, particularly in stringent environments, such as in aerospace and defense fields. The 3D NPR lattice structures exhibit superior dynamic loading and energy absorption capabilities compared to non-NPR materials and structures. However, a remaining barrier to their application is their low load-bearing capability. Despite attempts to address this by implementing an embedding enhanced strategy, no satisfactory and systematic design strategy has been developed. In addition, commonly used basic materials for fabricating the 3D NPR lattice structures are single types of materials such as metals or polymers of which the effect on improving the mechanical properties of 3D NPR lattice structures is limited.
In this presentation, a novel class of 3D NPR lattice structure that has high load-bearing capacity will be presented, and the effects of structural parameters on its mechanical performance will be discussed.
The work presented here is supported by the Research Grants Council of Hong Kong Special Administrative Region Government for the NSFC/RGC Joint Research Scheme (Grant number: N_PolyU516/20 and No.12061160461).
Professor Hong Hu is currently a full Professor at the Institute of Textiles and Clothing (ITC) and Departmental Research Committee Chair at the Hong Kong Polytechnic University. He obtained his Bachelor’s degree in Textile Engineering from Donghua University in Shanghai in 1982 and a Ph.D. degree in Textile Engineering and Fibrous Science from the University of Haute Alsace in France in 1987. He was a Visiting Scholar at the University of Haute Alsace from 1991 to 1992 and Visiting Professor at the University of Minho in Portugal from 1992 to 2002. Prior to joining ITC, he was a full Professor at Donghua University.
He is internationally renown for his cutting-edge research on 3D textile structures for composite reinforcement and auxetic textile materials. His research achievements in auxetic textiles have established him as a leader in the field. His monograph “Auxetic Textiles”, recently published by Elsevier, is the first such publication in this field. Professor Hu has issued 18 patents and published over 300 articles, with a h-index of 47 and over 8,700 citations. Professor Hu has also served as an editorial board member of various journals and was recently named as the World’s Top 2% Most-cited Scientists by Stanford University.