Homogenizing the acoustics of cancellous bone with an interstitial non-Newtonian fluid

R. P. Gilbert, Alexander Panchenko, Ana Vasilic

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We study the problem of derivation of an effective model of acoustic wave propagation in a two-phase medium composed of a linear KelvinVoight viscoelastic solid and a shear-thinning non-Newtonian fluid. Bone tissue is an important example of such composite materials. The microstructure is modeled as a periodic arrangement of fluid-saturated pores inside the solid matrix. The ratio ε of the macroscopic length scale and the size of the microstructural periodicity cell is a small parameter of the problem. We employ two-scale convergence and some other weak convergence techniques to pass to the limit ε→0 in the nonlinear governing equations. The effective model is a two-velocity system for the effective velocity v̄ and a corrector velocity w. The latter describes the influence of the high-frequency oscillations on the effective wave propagation. The effective constitutive equation provides an explicit dependence of the effective stress on e(v̄)+ey(w).

Original languageEnglish
Pages (from-to)1005-1018
Number of pages14
JournalNonlinear Analysis, Theory, Methods and Applications
Volume74
Issue number4
DOIs
Publication statusPublished - Feb 15 2011

Keywords

  • Bone mechanics
  • Homogenization
  • Non-Newtonian fluids
  • Poroelastic media

ASJC Scopus subject areas

  • Analysis
  • Applied Mathematics

Fingerprint

Dive into the research topics of 'Homogenizing the acoustics of cancellous bone with an interstitial non-Newtonian fluid'. Together they form a unique fingerprint.

Cite this