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Spring 2007

Michael Mutaku's picture

Michael Mutaku

My name is Michael Mutaku and I am a mechanical engineering student at the University of Maryland. I am a senior and I hope to graduate in May of 2007 with my bachelor's degree in ME. I am mostly interested in the fabrication of electronics and so flexible electronics sounded like an interesting topic to study. After the first day of class I decided to stay in this class because the professor discussed all the possibilities for flexible electronics including large displays. With more and more people buying big screen plasma screens, it seems vital for an engineer to understand how to create even larger displays in order to meet the demands of the people. With cellphones being able to carry live feeds from television stations, it only seems plausible for a person to have a personal screen comparable to a tv at the palm of your hand that can be folded to the size of a cellphone. 

Matthias Irmscher

My name is Matthias Irmscher and I am a graduate student currently visiting the University of Maryland for a year. I will finish my equivalent of a Master's degree at the Technical University of Ilmenau in Germany by the end of 2008. I am a current Fulbright grantee.

Ravikumar Sanapala's picture

Ravikumar Sanapala

Dear All,

My name is Ravikumar Sanapala. I am doing Master of Science (M.S) in Mechanical Engineering at University of Maryland. I recieved a Bachelor of Technology (B.Tech) degree in Mechanical Engineering from Indian Institute of Technology (IIT) Madras, India.

Lei Nie's picture

Lei Nie

I am a PhD student in Mechanical Engineering. My research field is the reliability of electronics and packaging. These topics have a big relationship with the manfacturing process of the electronics.

Richard Marth's picture

a little about myself

First of all, I am hardly a writer and to be honest, this tiny entry will probably have taken me a couple hours. Between watching tv, procrastinating, surfing the web, dealing with my recent concussion and the dizziness that has been associated with it, I've been having a bit of a tough time this semester. I think some of that may just be due to the fact that I'll be graduating (hopefully) soon.

David Schanuel's picture

David C. Schanuel

My name is David Schanuel and I am enrolled in the flexible macroelectronics course taught by professor Teng Li at the University of Maryland College Park. I am enrolled in this class for a couple of reasons, first being the interest in a new field of science and the second being a course that fufills a graduation requirement.

Adrian Podpirka's picture

Locating Journal Article

I was working on the problem set for and on question 16 and 17 refers to a paper by Charalmbides, Lund, Evans and McMeeking entitled 

"A Test Specimen for Determining the Fracture Resistance of Bimaterial Interfaces." (1989)

Zhigang Suo's picture

Homework on finite deformation

To the students of ES 241:

Although finite deformation was introduced in ES 240 (Solid Mechanics), finite deformation is a building block of ES 241. To review the subject, please go over a set of problems compiled by Jim Rice. If you need a reference, see my outline of finite deformation, where you can also find a short list of textbooks.

Zhigang Suo's picture

Homework problems 14-19

This set of homework is on mixed mode fracture and interfacial fracture

Lecture 11 & 12

Buckling delamination, with two slides on 1D vonKarman plates.

Zhigang Suo's picture

Poroelasticity, or migration of matter in elastic solids

A sponge is an elastic solid with connected pores. When immersed in water, the sponge absorbs water. When a saturated sponge is squeezed, water will come out. More generally, the subject is known as diffusion in elastic solids, or elasticity of fluid-infiltrated porous solids, or poroelasticity. The theory has been applied to diverse phenomena. Here are a few examples.

Zhigang Suo's picture

Lecture 9 Interfacial fracture

  • Williams singularity
  • Energy release rate
  • Mode angle
  • Stress oscillation
  • Small scale contact
  • Example 1:  A small crack on the interface
  • Example 2:  Thin film debonding
  • Interfacial fracture energy
  • Four-point bend specimen
  • Double-cantilever beam
  • The use of the interfacial fracture energy

ES 242r personal agenda

I am working on my PhD in Biomedical Engineering at the University of Neb. and have enrolled inES 242r because failure modes of many orthopedic implants can be attributed to initial flaws & fractures of material coatings.  This course, albeit, focuses on ductile materials, the principles seem relevant.

Zhigang Suo's picture

Lecture 8 Mixed mode fracture

Dear Students of ES 242r / ENGM 940:

You may be interested in reading about the self-introductions of your fellow students

The attached notes are written mainly for myself. Most figures are missing. I'll draw these figures in class. So please take good notes in class.

Adrian Podpirka's picture

Class Lectures with PowerPoint

I am pretty new to having a class that is fully powerpoint presentations and am wondering how everyone else is coping with it. Does anyone have any pointers or useful ways they keep notes in powerpoint classes? Printing the notes before hand? Anotating directly on the notes? Having a seperate notebook for notes and seperate handouts of presentation, etc etc?

Homework Q1

I am a PhD student at the University of Nebraska Lincoln. I obtained MS in Engineering Mechanics from the University of Nebraska Lincoln, where my thesis was focused on numerical simulation of elastic wave propagation in polycrystalline material, and Bachelor of Engineering in Mechanical from Pune University, India. At present I am working with Dr. Joseph A. Turner in the Ultrasonics and Vibration group. My research is primarily focused on the ultrasonic wave propagation in heterogeneous media using statistical approaches. My research has both theoretical/numerical and experimental aspects for materials characterization and nondestructive testing purposes.

Karla Polivka's Self Introduction

Hi my name is Karla Polivka. I am working part-time on my PhD degree in Mechanical Engineering at the University of Nebraska-Lincoln (UNL). What I mean by part-time is that I have been taking one class a semester for the last 5 semesters. I also received my Bachelors and Masters degrees in Mechanical Engineering from UNL.

Xuanhe Zhao's picture

ES 242r HW1 Q1

I'm Xuanhe Zhao, a first year PhD student working in Suo's Group, at Harvard University. Prior to coming to Harvard, I obtained a Master Degree in Materials Engineering from University of British Columbia.


J. Alberto Ortega's picture

My introduction to ES 242r

My name is J. Alberto Ortega, and I am a PhD student in civil engineering at the Massachusetts Institute of Technology (MIT). My undergraduate education took place in Texas A&M University (I am a proud member of the Fightin’ Texas Aggie Class of 2002, WHOOP!), majoring in Structural Engineering. I recently obtained my Master of Science degree in Structures and Materials from MIT.

HomeWork 1 Problem 1 Self Description

    I am Ashwani Kumar Goel, currently pursuing my Ph.D. from Engineering Mechanics Department, University of Nebraska Lincoln. I am from India. I have taken my Bachelors degree in Mechanical Engineering from HBTI, Kanpur,India and my Masters degree in Applied Mechanics from IIT, Delhi, India. I have taken lots of courses related to solid mechanics starting from my undergraduation. I have taken strength of materials ,applied mechanics, mechanics of solids during my undergraduate degree and applied elasticity, theory of plasticity, theory of plates and shells, continuum mechanics, linear viscoelasticity during my graduate degree. The group I work in focuses on theoretical, computational and experimental methods for the modeling and analysis of materials and the simulation of their response. I have been part of this group for about two and half years and focusing on theoretical and computational methods to extract material characteristics from novel experimental methods and in the implementation of these characteristics into simulations.


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