Practical Training Report

Dislocation Dynamics Simulations

Rajlakshmi PurkayasthaRoll No : 04011013

OutlineWhere : Royal University of Groningen

Who : Prof E Van der Giessen

What : Multiple Indenters and Source Strength Distribution

How : Great !

Where: University of Groningen

The University of Groningen is situated in Groningen, The Netherlands. One of the oldest universities in Europe, having been established in 1100 AD it is the biggest University serving north Holland. The Department of Applied Physics houses some of the most cutting edge work in Thin films and characterisation. And even though RuG is not a technical university, it houses a small group of enginners in this very building..

Who : Micromechanics Group

My work was with Professor Erik Van der Giessen of the Micromechanics Group of the University of Groningen, and Professor Lucia Nicola of Delft University.

Their Mission statement reads ,“The mission of this research group is to develop new models and computational tools for the micromechanics of materials, and to employ these to develop relationships between the internal structure of a material and its mechanical properties. We study material properties at a range of length scales, placing special emphasis on scale transitions.”

What : Multiple indentation and Source Strength Distribution

The goal : To run multiple randomly placed

indenters for any user defined widthThe Dislocation Dynamic framework analysed the effect of a bulk substrate of width 50 microns with sources distributed in it having the strengths distributed as per a Gaussian Distribution. I wanted to experiment with this distribution as well to see the effects of a non-uniform strength distribution.

From single...

....to multiple indenters

What :It involved changing the type of mesh used in the Finite

Element Mesh along with all the basic framework

What : Some Results

What : Some results

How : The experienceThe Research experience in itself was really

insightful Exposure to world class computing facilities

and pioneers in the fieldLearnt about the other practical difficulties of

reasearch such as logistics etc.Learnt about a new Country and a new

Culture, staying away from home is a very learning experience!

Thank You !