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Bent F. Sørensen's picture

Post Doc position in the area of fracture mechanics for sandwich structures

The Department of Mechanical Engineering, The Technical University of Denmark and Risø National Laborarory together seek a candidate for a Post Doc position. This position concerns growth of debonds in sandwich structures subjected to cyclic loads. The main research areas where these methods are to be developed include: Fracture mechanics for material interfaces, crack propagation modelling in structural components, material testing of sandwich face/core interface properties and experimental life time prediction of structural components.

Bent F. Sørensen's picture

Post Doc position in the area of fracture mechanics for sandwich structures

The Department of Mechanical Engineering, The Technical University of Denmark and Risø National Laborarory together seek a candidate for a Post Doc position. This position concerns growth of debonds in sandwich structures subjected to cyclic loads.

Bent F. Sørensen's picture

Post Doc Position: Fracture mechanics for solid oxide fuel cells

The Fuel Cells and Solid State Chemistry Department at Risø National Laboratory, Denmark, is seeking a postdoc to work on the fracture mechanics of solid oxide fuel cells.

The work consists of theoretical analysis, computations as well as experimental work. You will work together with the people making cells and stacks, and with the fracture mechanics group in the Materials Research Department.

Ravi-Chandar's picture

A blog for the International Journal of Fracture

I am pleased to announce that a new blolg associated with the International Journal of Fracture has been created by Springer. This is an ambitious project that aims to augment the published version of the papers and to create a dialogue between authors and readers. All articles beginning with the Dec 2004 issue now have a blog entry; ealier volumes will be added as digital processing of information continues. Discussion is not restricted to papers published in the journal, but should relate to the fracture/failure/structural integrity theme/micromechanics. Please see my post of Oct 25, 2006 for a detailed description of the obectives of the blog. I welcome your particpation in this experiment to enhance archival publication.

Question 16

Book Title: Mechanical Behavior of Materials: Engineering Methods for Deformation, Fracture, and Fatigue (Second Edition, Third Edition released earlier this year)

Author: Norman E. Dowling

Amazon.com Review Link

The book starts with a general overview and introduction to the mechanics of materials, but later emphasizes deformation, fracture and fatigue of materials. The following is a list of the chapters in the second edition:

(1) Introduction- Discusses types of material failure, design and materials selection, technological challenges, and the economic importance of fracture.

Micro/Nano Forum at Chicago Hilton, November 8, 2006-ASME Conference 2006

Dear Fellow ASME Micro & Nano Professionals :

There still is time to participate in the "Micro & Nano Society-Wide Forum" which will be held on Wednesday, November 8th, 5-8 pm, Williford Room C at the Chicago Hilton and Towers during ASME's Congress 2006.

The intention of this program is to stimulate cross-disciplinary knowledge-exchange, networking and synergy among ASME Members and other professionals interested in the development of nanotechnology. We extended the submission due date to Oct. 25th. (Previous one was a too short notice.)

A complimentary light dinner along with beverages will be provided during the program. All you need is your poster which will be tacked onto a poster board that is 96 inches by 48 inches (2.4 m by 1.2 m).

Min Huang's picture

The Influence of Light Propagation Direction on the Stress-Induced Polarization Dependence in Si Waveguides

The effects of light propagation direction on the stress induced polarization dependence of silicon-based waveguide were studied. As silicon is an anisotropic material, the change of polarization dependence induced by the photoelastic effect depends on the light propagation directions. It is found that when the light propagates in <100> directions on {100} silicon, the changes of refractive index and polarization shift are about 20% more sensitive to the stress than those when the light propagates in <110> directions. (IEEE Photonic Technology Letters, vol.

Zhigang Suo's picture

Vibration

Want papers published, proposals granted and to be a good reviewer? Here is the key --- "Ten Simple Rules" series.

Getting papers published and getting proposals granted are often great challeges for young researchers, let alone being a good reviewer. The "Ten Simple Rules" series by P.E. Bourne, L.M. Chalupa, and A. Korngreen delineate what we should follow.

More details about writing a good paper and proposal were also given by G. M. Whitesides ("writing a paper") and M.F. Ashby ("how to write a paper").

Pradeep Sharma's picture

Nonlinear Stability Analysis of Self-assembling Nanoscale Patterns

I thought I should take advantage of iMechanica and obtain feedback on some recent work that we did on nonlinear stability analysis of patterns.

A paradigmatic model that governs monolayer self-assembly was constructed a few years back by Wei Lu (Michigan) and Zhigang Suo. Apart from obtaining several physical insights they also conducted a linear stability analysis of their model. Borrowing technqiues from the nonlinear physics community, our work presents nonlinear stability analysis i.e. the initial state is no longer homogeneous and stable states beyond the transition are calculated. This allows a detailed construction of stability maps for various patterns without extensive numerical calculations.

This work is currently under review and I am attaching a pre-print with this post. Any comments and suggestions would be well-appreciated.

“An Introduction to the Mechanics of Solids” by S. H. Crandall, N.C. Dahl, and T. J. Lardner

“An Introduction to the Mechanics of Solids” by S. H. Crandall, N.C. Dahl, and T. J. Lardner

As the title explains, this book shows very basics of the solid mechanics. The book has a good coverage of the concepts of primary elements of mechanics, the three equations, some environmental effect, and examples of torsion, bending, and buckling. This book elaborately explains/proofs several important equations, whose procedures tend to be skipped in many courses due to time limitation. Various case studies/problems accompanied with suitable figures have always helped me to get better senses. It is also easy to find what I am looking for in the book with neatly sorted tables and index. And most importantly, I like this book since the book discusses engineering applications and the limitations of these models.

The materials given in ES240 exceed the range that this book can cover, but this book still is a good resource to go back to when I forget the basics since my sophomore year when I used as our textbook for the materials and structures.

Hanqing Jiang's picture

Faculty Positions in the Department of Mechanical and Aerospace Engineering at Arizona State University

Open Faculty Positons:

Open Faculty Position in Computational Mechanics

The Department of Mechanical and Aerospace Engineering at Arizona State University seeks applicants for a tenure-track faculty position in the area of computational mechanics. The appointment will be commensurate with the candidate’s experience and accomplishments and can be at the assistant, associate or full professor rank, beginning August 2007. At the time of appointment, candidates must have an earned doctorate in engineering or a related field.

Zhigang Suo's picture

Solid Mechanics Homework 26-30

26. Stress-strain relations under the plane strain conditions
27. Getting weak: derive weak statements from differential equations
28. Potential energy and Rayleigh -Ritz method
29. Constant strain triangle
30. Gaussian quadrature

Return to the outline of the course.

Wei Hong's picture

Faculty position in computational mechanics engineering science and mechanics department, Penn State University

The Engineering Science and Mechanics Department at The Pennsylvania State University invites applications for a tenure-track faculty position in computational mechanics at the assistant professor level. Exceptional candidates at the associate or full professor level will also be considered. Candidates are sought with a foundation and research interests in mechanics across all scales from the molecular to the macroscopic, including expertise in: efficient massive and nonlinear computations; molecular and multiscale simulations; innovative and efficient approaches to nonlinear FEM for large deformations, inhomogeneities, and/or inclusions; problems with evolving microstructure such as phase transitions and damage evolution; massively parallel simulations of large systems of equations; novel numerical/empirical approaches to modeling multiscale constitutive behavior of composite, biological or otherwise novel material systems.

Adrian Podpirka's picture

Textbook Recommendation

So besides using Timoshenko (which is basically the bible of solid mechanics), I have been using Slaughter's The Linearized Theory of Elasticity which I came across in the Gordon McKay Library.

Unlike some of the other textbooks, there is a big focus put on the theory and the idea behind the examples while still having many worked out problems. The first few chapters give a big refresher course on mathematics and lay the groundwork for what is to be taught later on.

I came across this book in particular for the in depth coverage of Airy Stress Functions.

The book is broken into 11 chapters:

Review of Mechanics of Materials
Mathematical Preliminaries
Kinematics
Forces and Stress
Constitutive Equations
Linearized Elasticity Problems
2D Problems
Torsion of Noncircular Cylinders
3D Problems
Variational Methods
Complex Variable Methods

Ji Wang's picture

Second Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (Spawda 2006)

Advances in the research of the theory of Piezoelectricity and Acoustic Waves have provided essential foundation and new opportunities to device technology and have been fostering academic exchanges and interaction in the piezoelectric device industry.With the increased research activities in piezoelectricity and acoustic waves and recent fast growth in piezoelectric devices, we are also facing many technological challenges from real engineering applications and product design and manufacturing.Following the successful SPAWDA 2004 in Ningbo, Chinese Society of Theoretical and Applied Mechanics, IEEE UFFC and the Acoustical Society of China have decided, also with industrial support, to hold the SPAWDA 2006 at Zhejiang University, Hangzhou, Zhejiang, China from December 14-17.The conference topics include, but not limited to,

Zhigang Suo's picture

Two recent articles about mathematicians

If you have not read them, you might find them interesting.

Virginia Polytechnic Institute & State University Faculty Positions

The Department of Engineering Science and Mechanics (ESM) at Virginia Tech seeks applications for two tenured or tenure-track faculty colleagues. The ideal candidates are expected to interface mechanics with the domain of biology (cellular mechanics, soft tissue biomechanics, macro-molecular biology, biodynamics, biofluids); the domains of nanotechnology or nanobiotechnology (mechanics of self-assembly, nanocomposites, functional nanodevices, biological and biomedical applications); or the domain of energy, with an emphasis on nanoscale and microscale problems or biological principles (fuel cells, renewable energy, energy conversion, clean energy, energy storage). However, intellectual depth is more important than the specific area of specialization, since ESM faculty members are expected to have a broad scholarly interest in engineering with a special emphasis on the fundamental mechanics.

Recommend books

If you prefer to learn tensors in solid mechanics, Nye's book is recommended.
The author covers most of the physical properties in various crystal structures. Some handy tables are included in the book. However, he uses ONLY tensors to derive the properties. If you prefer to write down equations one by one, this would not be a suitable book to start.
Timoshenko's book is also recommended too. As a beginner, this book explains not only the problem, also the meaning behind it. It clearly describes the fundamental questions.
Some books

Rui Huang's picture

2006 American Academy of Mechanics awards - Call for nominations

From Robert M. McMeeking (UC Santa Barbara).

The American Academy of Mechanics calls for nominations for two awards from its members:

The 2006 American Academy of Mechanics Outstanding Service Award

Preliminary nominations should consist of a one-page letter describing the outstanding service of the nominee to the Academy as well as to the profession, along with a one-page biographical sketch of the nominee, together with the names of at least three people willing to write letters of support in the event that the Awards Committee requests them.

The 2006 American Academy of Mechanics Junior Award

Jean H. Prevost's picture

Junior Faculty Position Opening at Princeton University

PRINCETON UNIVERSITY. Assistant Professorship. The Department of Civil and Environmental Engineering at Princeton University has initiated a search seeking to fill a tenure-track faculty position at the Assistant Professor level in any of the following areas: materials, mechanics of solids, and structural engineering. For information about our current research activities, see our webpage, http://www.cee.princeton.edu/. The Department seeks outstanding candidates with clear potential for innovation and leadership in research and teaching. The Department is interested in candidates with the capacity to establish interdisciplinary collaborations with other schools and departments at Princeton. We particularly seek to build on our strong historical ties to our School of Architecture and to the Princeton Institute for the Science and Technology of Materials (PRISM), and to develop links with broader initiatives dealing with sustainability of the built and natural environment.

Zhigang Suo's picture

Solid Mechanics Homework 21-25

21. A fiber in an infinite matrix
22. Anti-plane shear
23. Saint-Venant's principle for orthotropic materials
24. Plane problems with no length scales
25. More scaling relations: a half space filled with a power-law material

Return to the outline of the course.

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