Woodruff School of Mechanical Engineering

GT Courtesy Listing

Title:

On the role of discrete dislocation dynamics in multiscale modeling: perspectives and new developments

Speaker:

Dr. Laurent Capolungo

Affiliation:

Department of Mechanical Engineering

When:

Thursday, February 5, 2015 at 1:00:00 PM

Where:

MRDC Building, Room 4211

Host:

Dr. Min Zhou
min.zhou@me.gatech.edu

Abstract

Constitutive models rely on the formulation of phenomenological laws describing the evolution of internal state variables and their connection with mechanical response. Truly predictive models attempt at connecting these evolutions laws with defects configurations in the material. Focusing here on the case of crystalline media, discrete dislocation dynamics (DDD) can provide directions towards gaining an understanding of these phenomena and deriving mathematical laws rendering of such complex physics. The author will present an overview of the technical capabilities of DDD with applications to the case of nano materials, hexagonal materials, cubic materials in harsh environments. Moreover, novel techniques leading to computationally efficient solution of DDD problems will be presented.This will be followed by a discussion on the role of DDD in multi scale modelling addressing also the necessity of connecting with statistical mechanics concepts. Finally, the author will present and perform a demonstration of the DDD numerical tool packaged in a software with graphical user interface. It it the intent to demonstrate the usefulness of the software for teaching purposes.


Biography

Dr. Capolungo joined Georgia Tech in spring 2010 as an Assistant Professor at Georgia Tech Lorraine in Metz, France. Prior, he was a Postdoctoral Fellow in the Material Science and Technology Group at Los Alamos National Laboratory, where he focused on studying the deformation behavior of low symmetry materials (Mg, Zr, Be,U..) of interest to the automotive and nuclear industry.

Notes

Refreshments will be served.