608 Computational Design of Multifunctional Lattice Materials

Fernando Fraternali, University of Salerno
Vitali F. Nesterenko, University of California, San Diego
Julian J. Rimoli, Georgia Institute of Technology
Robert E. Skelton, Texas A&M
The nascent, rapidly growing field of mechanical and acoustic metamaterials is attracting increasing attention from many research sectors - including acoustics, aerospace and mechanical engineering, medical diagnosis and remote sensing, sound and heat control. This is due to the great technological potential of unconventional materials with properties mainly derived from their geometric design and tunable interaction forces between elements, rather than from their chemical composition.
Ordinary engineering materials typically exhibit either elastic stiffening (e.g., crystalline solids), or elastic softening (e.g., foams). For example, the geometrically nonlinear response of structural lattices based on tensegrity units (e.g., tensegrity prisms), may gradually change their elastic response from stiffening to softening through the modification of mechanical, geometrical, and prestress variables. Tensegrity structures are prestressable truss structures, which are obtained by connecting compressive members (bars or struts) through the use of pre-stretched tensile elements (cables or strings).
The focus of the present Symposium is on the computational design of novel tunable, multifunctional lattice materials at the nano-, micro- and macro-scales, and their development in engineering fields where current knowledge of such systems is consolidated or only partial. We also welcome contributions on general architecture lattice structures or other types of discrete systems whose mechanical (elastic and dissipative) properties can be customized by changing geometry, connectivity, or prestress, more or less independently from the properties of the bulk.