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ES 240 Project: Impact Strength of a Hand-Made Bashring

[img_assist|nid=4271|title=Finished Bashring|desc=|link=popup|align=right|width=100|height=75][img_assist|nid=4272|title=Unfinished Bashring Mounted on Crank|desc=|link=popup|align=right|width=100|height=75]

Project Description:

ES 240 Project: Volvox Inversion Mechanics

The biology of the inversion process in Volvox carteri is examined, and a coupled mechanical and kinetic model is proposed.  See attached proposal for details. The presentation given is also attached here, as well as the final paper.  Also, a movie of the simulation that made all of the work wroth while, the inversion of a half-sphere, is attached here as well.  Note: The file inversion2bw.doc is a movie, just download it and change the extension to .avi.  This has to be done since iMechanica doesn't allow attachment of .avi files directly.

Yuhang Hu's picture

Computer Assignment #2

Computer assignment #2 : natural frequency problem

due on Monday (Nov. 17, 2008)

Yuhang Hu's picture

Assignment #1

Assignment #1 and related paper

Yuhang Hu's picture

Abaqus Tutorial

1 Schedule & Proceedings

2 Reading-about ABAQUS

3 Learning ABAQUS

4 CAE example

Mechanics of Materials by F.P. Beer, E.R. Russell Johnston Jr. and J.T. DeWolf

Mechanics of Materials is the book I used for my undergraduate course in strength of materials and it helped me understand the basics, and hence my selection. 

The outline is as follows:

Ch. 1: Introduction -  concepts of stress

Ch. 2: Stress and strain - axial loading

Ch. 3: Torsion

Ch. 4: Pure bending

Ch. 5: Analysis and design of beams for bending

Ch. 6: Shearing stresses in beams and thin-walled members

Ch. 7: Transformations of stress and strain

Sung Hoon Kang's picture

ES 240 Homework 16

* Title of the post: Theory of Elasticity by S.P. Timoshenko and J.N. Goodier



* If there are already helpful reviews of the book online, please make a hyperlink in your

Self Introduction -- Zhiyan Wei

Prior Courses in Solid Mechanics:

Elasticity, Strength of Material, Plasticity, Theoretical Mechanics, Advanced Solid Mechanics, Computational Mechanics

Undergraduate Major:

Theoretical and Applied Mechanics

Strength Related to This Course:

Solution to PS 2.6

My previous exposure to solid mechanics is tangential beyond a first semester course in beam bending, beam stretching, and beam torsion. I am a master of Mohr's circle, and am looking to extend my practice in solid mechanics to include interesting problems and applications of the theory of solids.

I studied Engineering Mechanics as an undergraduate, and received a second degree in Mathematics, with a concentration in Applied Math.

Tom Milnes' First Blog Entry

Hi All,

--I have taken 3 previous courses in solid mechanics. 

--My undergraduate major was mechanical engineering, with a concentration in vehicle dynamics.

-- My strength is that I've had some of this material before.  My weakness is that I haven't seen it for a few years.

--I'm a masters student so I don't have a research group.  I do work part time for a hedge fund though.

--Solid mechanics will add an interesting dimension to my education. 



PS2 Question 6

I have not taken any courses focusing on mechanics before, though ES51 (Computer Aided Machine Design) briefly touched on some topics.  My undergraduate major was Physics.  My strengths will be my comfort with mathematics as well as my exposure to professor Howard Stone's undergraduate class in Fluid Mechanics (ES123).  My weakness will definitely be my lack of exposure to any other mechanics courses.

Matt Pharr's picture

Matt Pharr's First Post

My name is Matt Pharr, and I am a first year graduate student at Harvard in the School of Engineering and Applied Sciences.  I am working with Dr. Zhigang Suo's research group .  My concentration is in solid mechanics, so ES 240 is obviously fundamentally important to my future research.  One of my main goals in this class is to build a solid foundation in solid mechanics.  More specifically, I want to be able to better analyze problems and understand equations in terms of their physical meaning.

My first entry


My name is Pawel and I am a Junior in Harvard College, studying Mechanical and Materials Science and Engineering.

The only course in solid mechanics I've taken so far is the Harvard's undergraduate intro course ES 120 - I guess it's similar to intro courses offered at other universities. Bits and pieces of solid mechanics also appeared in some other courses, but mostly in a very basic form.

Kejie Zhao's picture

Kejie Zhao

Hi everyone, very glad to see you here. My name is Kejie Zhao, a first year phd student working in Prof.Zhigang Suo's group ( My concentration is solid mechanics with the same name of this course, it also signifies its importance to my future research. I graduate from Xi'an Jiaotong University in China before coming to Harvard. There I obtained my bachelor and master degree in Engineering Mechanics and Solid Mechanics respectively.

Sung Hoon Kang's picture

ES 240 Homework 6


My name is Sung Hoon Kang and I am a second year graduate student of Applied Physics. I did my undergraduate study in Materials Sciene and Engineering at Seoul National University, Korea.

Carl T. Herakovich's picture

Berger on Video Solutions for Teaching Mechanics

Professor Ed Berger, Univeristy of Virginia Mechanical Engineering, is featured in the Chronicle of Higher Education for his use of web technologies and, in particular, "video solutions" for teaching undergraduate mechanics courses. See  Or contact Berger at  Ed hasn't used this approach for all undergraduate mechanics courses as yet, but the potential is there. 

PhD Position: Solid Mechanics/Biomechanics at KTH-Stockholm

PhD Position: Solid Mechanics/Biomechanics at KTH-Stockholm

A four to five-year PhD position focusing on the analysis of multi-scale phenomena in diseased blood vessels including atherosclerotic plaques has recently been opened at KTH Solid Mechanics. The position is fully supported by the Swedish Research Council.

Dean Eastbury's picture

Michael Ortiz wins inaugural Rodney Hill Prize in Solid Mechanics

I am delighted to announce on behalf of Elsevier that Professor Michael Ortiz of CalTech has won the very first Rodney Hill Prize in Solid mechanics in reconition of his body of research during the decade 1998-2007. The prize will be presented at ICTAM in Adelaide on 27 August by Y.S. Chi, Vice Chairman of Elsevier immediately prior to Michael's Hill Prize lecture. For more details please see

Dean Eastbury


Dean Eastbury's picture

Issue 2 of J. Mechanical Behavior of Biomedical Materials published

I am pleased to announce that Volume 1, Number 2 of the the recently-launched Journal of the Mechanical Behavior of Biomedical Materials ( has been published by Elsevier. All JMBBM articles can be accessed free-of-charge on ScienceDirect until September 2008 (


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