User login

You are here

ES 247

Zhigang Suo's picture

Interfacial Fracture

These notes belong to a course on fracture mechanics

A body consists of two materials bonded at an interface. On the interface there is a crack. The body is subject to a load, causing the two faces of the crack to open and slide relative to each other. When the load reaches a critical level, the crack either extends along the interface, or kinks out of the interface.

Zhigang Suo's picture

Mixed-Mode Fracture. Curved Crack Path

These notes belong to a course on fracture mechanics

A crack pre-exists in a body. When the body is loaded, the two faces of the crack may simultaneously open and slide relative to each other. The crack is said to be under a mixed-mode condition. When the load reaches a critical level, the crack starts to grow, and usually kinks into a new direction. Subsequently the crack often grows along a curved path.

Zhigang Suo's picture

Crack Bridging. Lecture 2

These notes belong to a course on fracture mechanics

Lecture 1 introduced the crack bridging model. The model is also known as the cohesive-zone model, the Barenblatt model, or the Dugdale model. The model consists of two main ingredients:

Zhigang Suo's picture

Crack Bridging. Lecture 1

These notes belong to a course on fracture mechanics

Following Griffith (1921), we distinguish two processes: deformation in the body and separation of the body. Up to this point, the process of deformation has been described by field theories of various kinds, such as

Zhigang Suo's picture

Elastic-Plastic Fracture Mechanics. Lecture 2

These notes belong to a course on fracture mechanics

Lecture 1 described the Begley-Landes experiment, and the blunting of a crack due to large deformation. Lecture 2 is motivated by the following considerations.

Zhigang Suo's picture

Elastic-Plastic Fracture Mechanics. Lecture 1

These notes belong to a course on fracture mechanics

Decouple elastic deformation of the body and inelastic process of separation. Up to this point we have been dealing with the following situation. When a load causes a crack to extend in a body, a large part of the body is elastic, and the inelastic process of separation occurs in a zone around the front of the crack. Inelastic process of separation includes, for example, breaking of atomic bonds, growth of voids, and hysteresis in deformation.

Zhigang Suo's picture

The J integral

For a crack in an elastic body subject to a load, the elastic energy stored in the body is a function of two independent variables: the displacement of the load, and the area of the crack. The energy release rate is defined by the partial derivative of the elastic energy of the body with respect to the area of the crack.

Zhigang Suo's picture

Fracture of Rubber. Lecture 2

Fracture mechanics without invoking any field theory. In Lecture 1 on Fracture of Rubber, we considered the extension of a crack in an elastic body subject to a load. Following Rivlin and Thomas (1953), we regarded the elastic energy stored in the body as a function of two independent variables: the displacement of the load, and the area of the crack. The partial derivative of the elastic energy with respect to the area of the crack defined the energy release rate.

Fundation of Fracture Theory <断裂理论基础>

Actually, I don't know much about Fracture Mechanics. This is the book that my previous teach in Beijing Inst of Tech recommended it to me. I think it is good.

Zhigang Suo's picture

Fracture of Rubber

A rubber band can be stretched several times its original length. This large deformation may hide its brittleness: the strain to rupture can be markedly reduced by the presence of a crack. This lecture describes fracture mechanic of highly deformable materials, such as rubbers and gels.

Kamyar M Davoudi's picture

Some books on Fracture Mechanics

Fracture Mechanics, Fundamentals and Applications, T.L. Anderson, CRC Press, 3rd Ed., 2004.


This book is in line with what Zhigang is teaching in class. Because Kejie and Widusha have already recommended this book, I would like to introduce you some other books as well as a different approach to cracks and Fracture Mechanics.

Kejie Zhao's picture

ES247: Fracture Mechanics, Fundamentals and Applications. 3rd Edition

The book I recommend for reading is Fracture mechanics: fundamentals and applications, by T.L.Anderson, 3rd edition, 2005. I first saw this book on the top list of reading materials of Brown U. When I have it I found so pleasent to read through it. Here is the short-list of its content

Chapter 1: Introduction: History and overview

Chapter 2:Fundamental concepts: linear elastic fracture mechanics

Chapter 3: Elastic-plastic mechanics

Chapter 4: Dynamic and time-dependent fracture

Chapter 5: Material behavior: Fracture mechanics in metals

Cai Shengqiang's picture

Dynamic fracture mechanics

Dynamic fracture mechanics is written by a very well known professro-L B Freund. Honestly, I have only read a small part of the book. However, I recommend this book because after reading this book, you can learn many things which haven't be touched in the class, as stated by Zhigang in the beginning of the class.

Zhigang Suo's picture

Stress Corrosion

A glass may withstand a static load for a long time (days, weeks, or years) and then, without warning, breaks suddenly. Here are salient empirical observations:

Denvid Lau's picture

Atomistic Modeling of Materials Failure by M. J. Buehler

This book is an introduction to molecular and atomistic modeling techniques applied to solid deformation and fracture.  Focusing on various brittle, ductile and geometrically confined materials, this book includes computational methods at the atomistic scale, and describes how these techniques can be used to model the dynamics of crack, dislocations and other deformation mechanisms.

Lihua Jin's picture

Elementary Engineering Fracture Mechanics by David Broek

I think this book is a good complement to the course Fracture Mechanics ES 247. There are several reasons:

Zhigang Suo's picture

Fatigue

These notes were prepared when I taught fracture mechanics in 2010, and were updated when I taught the course again in 2014.

Notes on other parts of the course are also online.

 

Pages

Subscribe to RSS - ES 247

Recent comments

More comments

Syndicate

Subscribe to Syndicate