Dislocation Dynamics Simulations
Practical Training Report
Rajlakshmi Purkayastha
Roll No : 04011013
Outline
Where : 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
From single...
....to multiple indenters
The goal : To run multiple randomly placed indenters for any user defined
width
The 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 nonuniform strength distribution.
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 experience
 The Research experience in itself was really insightful
 Exposure to world class computing facilities and pioneers in
the field
 Learnt 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 !