Session: 02-06-01: Structural Dynamics and Control of Aerospace Structures

Paper Number: 121653

121653 - Biomimetic Scaled Structures - Exploring Symmetries and Nonlinearity in Structural Damping 

Fish scale like features on substrates arranged periodically produce peculiar mechanical behavior. These include nonlinear stiffness, anisotropy in deformation and finally jamming behavior. These smarst structures can be fabricated by partially embedding stiffer plate like segments on softer substrates to create a bi-material system, with overlapping scales. The dynamic response show remarkable geometrical-material interplay and anisotropies in damoing. Especially interesting is the damping behavior that is distinct from typical damping found in mechanical structures which are often approximated as Rayleigh-Damping. Here we discuss some of these dynamic behaviors that include material-geometry distinction in damping, multiple damping modes and interplay of dissipation possibilities. We will derive simple mathematical laws that govern architecture-dissipation relationships that can help guide design. We conclude by noting the distinction of structural damping with other forms currently in used in practice. 

Presenting Author: Md Shahjahan Hossain University of Central Florida

Presenting Author Biography: Md Shahjahan Hossain is a Ph.D. candidate in Mechanical Engineering at the University of Central Florida, specializing in the mechanics and multifunctional properties of metasurfaces. With a master’s in manufacturing engineering from Georgia Southern University, his expertise encompasses in-situ process monitoring and (non-destructive testing) NDT. Shahjahan's professional background also encompasses key roles in mechanical engineering. His work demonstrates a profound commitment to advancing mechanical engineering through research that bridges theoretical study and practical application.