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Zhigang Suo's blog

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Flaw sensitivity

I now include this paper in my course on fracture mechanics.

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Chemical bond

The two slides intend to show the quantum mechancal origin of the surface energy.  The slides suplement a course on Fracture Mechanics.

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Chemical bond

The two slides intend to show the quantum mechancal origin of the surface energy.  The slides suplement a course on Fracture Mechanics.

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Recipe for catastrophe

Last year we published a paper titled “Electromechanical Catastrophe”.  I am planning to give a lecture on this topic in my course on Advanced Elasticity.  The mathematics of catastrophe is old, but can be used more widely.

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Harvard University Tenure-track faculty position in Bioelectronics

The Harvard John A. Paulson School of Engineering and Applied Sciences seeks applicants for a position at the tenure-track level in Advanced Bioelectronics, with an expected start date of July 1, 2018.

We seek candidates who have a strong research record in the area of advanced bioelectronics, optics, or magnetics, including novel classes of materials and devices, for use in biomedical applications.

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Thermodynamics in thirty-some slides

I am teaching Advanced Elasticity again.  Thermodynamics is involved in nontrivial ways in several topics, such as entropic elasticity and swelling hydrogels.

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Input-output economics

These notes are a part of the notes on linear algebra.

In lecture, I have been using this google doc, which contains more tables.

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Sankey Diagram. Energy flow charts of the US and China

This post is a part of my notes on linear algebra.

A Sankey diagram is a visual display of the flow of a scalar.  In a Sankey diagram, the width of each branch of the flow is proportional to the magnitude of the scalar.

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What's That Stuff

A few years ago I bought a Chinese book titled 你身边的化学.  The book contains articles about chemistry in everyday life.  The authors collected these articles from magazines and websites, and translated them into Chinese.  In particular, the authors mentioned a column, called “What’s That Stuff”, in Chemical & Engineering News.

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Google Translate has been greatly enhanced by machine learning

Here is a long article from New York Times.  I have just tried some English-Chinese translation.  The improvement is dramatic.  Will machine learning affect mechanics.or materials discovery?

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Linear equation

These notes are a part of the notes on linear algebra.

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Scalar done right

Almost three years also , I posted an entry titled Scalar Done Wrong.  The entry has received a large number of comments, and 16,793 reads.  I have since tried to get scalars right.  I have just attached today’s version of my notes as a PDF file to the original entry.

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Vector

These notes are a part of the notes on linear algebra.  I compare spacetime and appleorange.

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Map

These notes are a part of the notes on linear algebra.

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Relation

These notes are a part of the notes on linear algebra.

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Imperfections in Crystalline Solids

Wei Cai and Bill Nix, of Stanford University, have just published a new textbook Imperfections in Crystalline Solids.  You can look at the first chapter at the website of the Cambridge University Press.  

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Cartesian product

These notes are a part of the notes on linear algebra.

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Set

These notes are a part of the notes on linear algebra.

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Number

These notes are a part of the notes on linear algebra.

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A new review article on stretchable and reconfigurable electronics

Muhammad Hussain leads a dynamic group at KAUST working on the development of stretchable and reconfigurable electronics.  He came to the field with a background of semiconductors.  Last year he gave an Applied Mechanics Colloquium at Harvard.  Students and faculty were all deeply impressed by the creativity and range of his work.

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Toughness due to hysteretic deformation

These fragments of notes are intended for a course on fracture mechanics, but I have always run out of time, and have never managed to go over them in class.  Some of the ideas are mentioned in various parts of the class.  I have also listed refeences and review articles.

 

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Linear form

These notes are part of my notes on linear algebra.  I believe that textbooks of linear algebra give a bad definition of linear form.  The last section of the notes explain why it is bad.  I also give examples of linear form everyday life and from physics.  Given the vector space of distance, both force and electric field are dual spaces of the space of distance.  They are distict dual spaces of the space of distance, and they are not dual spaces to each other.

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Linear Algebra

Everything about AM 21b 2017

Everything about AM 21b 2018

 I’ll post sections of notes on linear algebra when they are ready.

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Gibbs's Paper II: equilibrium, stability, metastability, phases, critical points, and exergy

Paper II.  A METHOD OF GEOMETRICAL REPRESENTATION OF THE THERMODYNAMIC PROPERTIES OF SUBSTANCES BY MEANS OF SURFACES, 1873

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Gibbs: Thermodynamics

I bought this reprint by the Ox Bow Press in 1990s.  The quality of print is excellent. The book collects all papers of Gibbs on thermodynamics. I’ll focus on the three main papers:  Paper I (pp. 1-32), Paper II (pp. 33-54), and Paper III (pp. 55-371).  Papers I and II are short and fundamental.  Paper III is very long; it applied the basic approach developed in the short papers to a large number of important phenomena.  Over the years I have returned to the book many times, and will continue to do so in coming years.

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