Woodruff School of Mechanical Engineering

COE/Structural Mechanics Seminar

Title:

Investigation of Nonlinearities Due to Contact Interfaces: Forward and Inverse Characterization Approaches

Speaker:

Dr. Melih Eriten

Affiliation:

Assistant Professor, Department of Mechanical Engineering, University of Wisconsin-Madison

When:

Monday, November 24, 2014 at 11:00:00 AM

Where:

MRDC Building, Room 4211

Host:

Dr. Alper Erturk
alper.erturk@me.gatech.edu

Abstract

Contact interfaces in engineering structures and nature involve highly stochastic and multiscale interactions such as friction, adhesion and wear. These interactions cause inherent nonlinearities in the component and system compliance, damping and failure. Our recent efforts focus on characterization of these nonlinearities using both forward and inverse dynamics. In this talk, I will present examples of both approaches in mechanical and biological systems. Specifically, I will first introduce a multiscale modeling approach that explains the major mechanisms of nonlinear compliance and damping in the contact interfaces. Next, I will demonstrate how to control these mechanisms to achieve tunable compliance and damping in mechanical and bio-inspired interfaces. Finally, I will present a generic inverse dynamics approach where local sources of nonlinearities such as contact interfaces can be identified from the measured nonlinear dynamical responses.


Biography

Dr. Melih Eriten received his bachelorís degree in mechatronics engineering with a minor in mathematics from Sabanci University, Istanbul, in 2005; and his masterís degree in applied mathematics and Ph.D. in mechanical engineering from the University of Illinois at Urbana-Champaign (UIUC) in 2008 and 2012, respectively. He worked as a postdoctoral research associate at UIUCís Linear and Nonlinear Dynamics and Vibrations Laboratory and served as a visiting lecturer. In July 2012, Dr. Eriten joined the faculty at the University of Wisconsin-Madison as a tenure-track assistant professor in the department of mechanical engineering. His research interests are in contact mechanics and tribology; multiscale testing, characterization and modeling of materials, and nonlinear dynamics of materials and assembled structures. He is the author/co-author of 23 journal articles and 18 articles in conference proceedings, and has delivered a number of technical presentations and invited talks. In 2012, Dr. Eriten received ASMEís Marshall B. Peterson Award for significant contributions in presliding behavior of frictional contacts.

Notes

Refreshments will be served.