Rayleigh wave propagation in cortical bone according to Mindlin's Form II gradient elastic theory

The Faculty of Informatics is pleased to announce a seminar given by Leonidas Gergidis

DATE: Thursday, March 14th, 2013
PLACE: USI Università della Svizzera italiana, room SI-008, Informatics building (Via G. Buffi 13)
TIME: 14.30

ABSTRACT:
The classical linear theory of elasticity has been widely used for the ultrasonic characterization of bone. However, linear elasticity cannot adequately describe the mechanical behavior of materials with microstructure, in which the stress state has to be defined in a non-local manner. The simplest form of gradient theory Mindlin Form-II is used to theoretically determine the velocity dispersion curves of guided modes propagating in isotropic bone-mimicking plates. The aforementioned theory is used to analytically determine the velocity dispersion curves of guided and Rayleigh waves. These curves are also compared with the predictions of the classical linear theory of elasticity, with computational  results obtained from the solution of the gradient theory with the  Boundary Element method and with curves obtained experimentally.

BIO:

• January 2011-now, Lecturer at the Department of Materials Science and Engineering (DMSE), University of Ioannina, Greece.
• 1995 BSc. in Physics, University of Patras, Greece.
• 2000 PHD in Chemical Engineering (Patras) supervisor Doros N. Theodorou. Title: "Sorption and Diffusion of alkanes in zeolites using molecular simulations".
• 2000 - 2002,  officer 2nd  Lieutenant  in Greek armored corps.
• 2003-2008 visiting Lecturer at the Department of Materials Science and Engineering and post doctoral researcher working on numerical simulation of scattering, elasticity problems, atomistic and molecular simulation of polymers.
• March 2008- April 2009 post doctoral researcher at Penn State University, USA working on atomistic simulations of nanoparticles.

HOST: Prof. Rolf Krause