Indenter–Foam Dampers Inspired by Cartilage: Dynamic Mechanical Analyses and Design

Guebum Han, Utku Boz, Lejie Liu, Corinne R. Henak, Melih Eriten

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Articular cartilage is a thin layer of a solid matrix swollen by fluid, and it protects joints from damage via poroviscoelastic damping. Our previous experimental and simulation studies showed that cartilage-like poroviscoelastic damping could widen the range of damping methods in a low-frequency range (<100 Hz). Thus, the current study aimed to realize cartilage-like damping capacity by single- and two-indenter–foam poroviscoelastic dampers in a low-frequency range. Multiple single-indenter–foam dampers were designed by combining foam sheets with different pore diameters and indenters with different radii. Their damping capacity was investigated by dynamic mechanical analysis in a frequency range of 0.5–100 Hz. Single-indenter–foam dampers delivered peak damping frequencies that depended on the foam’s pore diameter and characteristic diffusion length (contact radii). Those dampers maximize the damping capacity at the desired frequency (narrowband performance). A mechanical model combined with simple scaling laws was shown to relate poroelasticity to the peak damping frequencies reasonably well. Finally, combinations of single-indenter–foam dampers were optimized to obtain a two-indenter–foam damper that delivered nearly rate-independent damping capacity within 0.5–100 Hz (broadband performance). These findings suggested that cartilage-like poroviscoelastic dampers can be an effective mean of passive damping for narrowband and broadband applications.

Original languageEnglish (US)
Article number051113
JournalJournal of Vibration and Acoustics
Volume142
Issue number5
DOIs
StatePublished - Oct 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 by ASME.

Keywords

  • Broadband damping
  • Cartilage dissipation
  • Damping
  • Poroviscoelasticity
  • Tunable peak damping frequency

Fingerprint

Dive into the research topics of 'Indenter–Foam Dampers Inspired by Cartilage: Dynamic Mechanical Analyses and Design'. Together they form a unique fingerprint.

Cite this