Douglas P Holmes's picture

Journal Club Theme of February 2012: Elastic Instabilities for Form and Function

Welcome to February 2012's Journal club, which will include a discussion on elastic instabilities for form and function. Not long ago, the loss of structural stability through buckling generally referred to failure and disaster. It was a phenomenon to be designed around, and rarely did it provide functionality*. The increasing focus on soft materials, from rubbers and gels to biological tissues, encouraged scientists to revisit the role of elastic instabilities in the world around us and inspired their utilization in advanced materials. Now the field of elastic instabilities, or extreme mechanics, brings together the disciplines of physics, mechanics, mathematics, biology, and materials science to extend our understanding of structural instabilities for both form and function. In this journal club, we're going to look at research on the wrinkling, crumpling, and snapping of soft or slender structures. 


Postdoctoral Research Assistant in Modelling Creep Damage

At Oxford University we are seeking to appoint a post doctoral Research Assistant to work on the modelling of cavity nucleation and growth in the heat affected zone of a welded component operating in the creep regime. A detailed advertisement and further particulars about the post can be found in the attached files.

Further Information can be obtained from Prof Alan Cocks - alan.cocks@eng.ox.ac.uk


Mubeen's picture

FEAP umat routines

Hi all,

I am using FEAP 8.2 in my university, and have to write a user material routine, but there is no clear guideline/example about which files to modify for this purpose. Sorry to say, the programmer's manual is very short, and very little detail is there.

The old tutorials/examples based on FEAP (7.x) are no longer helpful because the FEAP 8.2, 8.3 source code has changed considerably (atlease the files in user folder), hence the novice can get mad after trying for many weeks to figure out the way for doing this.


Nanshu Lu's picture

Call for abstract-ASME IMECE 2012 Track 9-35 Symposium on Integrated Structures and Materials in Advanced Technologies

Dear colleagues,

We would like to invite you to submit an abstract to a Symposium on Mechanics of Integrated Structures and Materials in Advanced Technologies at the ASME 2012 IMECE, to be held Nov 9-15, 2012, at Houston Texas. This symposium will be the seventh in such a symposium series organized by ASME Technical Committee of Integrated Structures since IMECE 2006. We hope you can join us and continue the success of this symposium series.

Deadline of abstract submission is Monday, 27 Feb. 2012.

Topics of interests include, but not limited to the following areas: 


ABAQUS/Explicit - define the number of calculation frames (default is 20?)

Dear fellows,

 

I am performing quasi-static analysis on ABAQUS/Explicit and I would like to know how one can change the number of time frames used in calculation. It is my understanding that the default value is 20 frames, but I would like to increase this number, if possible.

Does anyone know how to do this?

Thanks for any input in advance.

Cheers.


How do Italian Universities compare with British Universities, and the importance of Charles Dickens.

Mike Ciavarelli and I discussed the possibility of doing a comparison of Italian and British Universities. On reflection, I could not decide where to begin but wrote the attached. It is part personal experience, part history and part Charles Dickens who was born 200 years ago today. If you don't understand the connection, read on.


Harsha Tirumala's picture

Looking for PhD Position


I am Sri Harsha , currently in my final year of undergraduate study Mechanical Engineering (with Industrial & Production Engineering as Minor) from the Koneru Lakshmaiah College of Engineering (www.klce.ac.in) located in the southern state of Andhra Pradesh in India. I will complete my UG in May 2012.

I am interested in pursuing graduate study, preferably direct-PhD if possible and an eventual research career in academia.
My GRE score is 308/340. (from 1250-1280 as per the old scale). TOEFL score is 96/120.


Keith Foo's picture

Model of dissipative dielectric elastomers

Choon Chiang Foo, Shengqiang Cai, Soo Jin Adrian Koh, Siegfried Bauer, Zhigang Suo.

Model of dissipative dielectric elastomers
.
Journal of Applied Physics 111, 034102 (2012).

Abstract


Harold S. Park's picture

IMECE 2012: Minisymposium on Multiphysics Simulations and Experiments for Solids

Dear Colleagues:

We would like to invite you to submit an abstract for the 2012 ASME
IMECE in Houston, to be held November 9-15, 2012.  Our minisymposium
is on "Multiphysics Simulations and Experiments for Solids", and is the
continuation of a very successful minisymposium held for the past 5 years
that have resulted in more than 40 presentations at the 2009, 2010 and 2011 IMECE conferences.  This year's focus areas
are:

1.Multiphysics modeling, simulation and experiments of electromechanical materials and systems

2.Multiphysics modeling, simulation  and experiments of optomechanical materials and systems


composite modelling

 I am try to make a glass fiber compoite material if any one know how to make the model& help to complete my project


controlled simmulations in Abaqus using simulink

HI,

I am currently working on a project in which i am using abaqus for FEA simulations. Now, i am currently experiencing a problem since i need controlled simulations ex: input force control using feed back loop system. I give a thought of interfacing abaqus with simulink.But, since i am new to it i don't know whether it is possible or not. Can any one help me out in this problem?is it possible to control the simulations in Abaqus using  simulink?if so, please help me out in clearing this problem.If anyone have an idea of this please provide me any link or material to solve this problem.

             Thank you.


Post-doctoral position in multidisciplinary design optimization (ULB-BATir, Belgium)

Environment

The post-doctoral position will be accomplished within the BATir (Building, Architecture & Town planning) department of the Brussels School of Engineering/´Ecole polytechnique de Bruxelles, at the Universit´e Libre de Bruxelles (http://batir.ulb.ac.be ). Duration of the position: 18 months, starting in April 2012.

 

Profile

The applicant should hold a PhD in computational mechanics. Additional competences in numerical optimization, and structural finite elements, as well as programming skills (in MATLAB, PYTHON, C++, or any equivalent programming anguage) will be highly appreciated.


Luoyu Roy Xu's picture

IMECE 2012 (ASME Congress) Symposium on Fundamentals and Applications of Failure Mechanics

Why should we investigate fracture and failure mechanics? From this Boeing 737 accident (below) to recent fatigue cracks of new Airbus  A380,  we must use failure mechanics knowledge to save our lives. Therefore, Dr.H. Eliot Fang (Solid Mechanics Program Manager at the DOE Sandia National Labs) and I would invite you to submit abstracts to our symposium on Fundamentals and Applications of Failure Mechanics

 


Mike Ciavarella's picture

10 QUESTIONS TO THE ITALIAN GOVERNMENT: Minister PROFUMO, Premier MONTI, President NAPOLITANO


The Italian prime minister faces big protests against liberalisation, and the biggest one who is about to explode is the "abolishment of legal value" of Italian Universities. See how Economist describes the Italian Reforms of Premier Monti .



  


Announcement on Deadline of The 5th IFAC Symposium on Fractional Differentiation and Its Applications

The Fifth IFAC Symposium on Fractional Differentiation and Its Applications - FDA12


May 14-17 2012, Hohai University, Nanjing, China
Website
http://em.hhu.edu.cn/fda12/


Yong Zhu's picture

Size effects on elasticity, yielding, and fracture of silver nanowires

This paper reports the quantitative measurement of a full spectrum of mechanical properties of fivefold twinned silver (Ag) nanowires (NWs), including Young’s modulus, yield strength, and ultimate tensile strength. In-situ tensile testing of Ag NWs with diameters between 34 and 130 nm was carried out inside a scanning electron microscope (SEM). Young’s modulus, yield strength, and ultimate tensile strength all increased as the NW diameter decreased. The maximum yield strength in our tests was found to be 2.64 GPa, which is about 50 times the bulk value and close to the theoretical value of Ag in the <110> orientation. The size effect in the yield strength is mainly due to the stiffening size effect in the Young’s modulus.


Yong Zhu's picture

Buckling of Aligned Carbon Nanotubes as Stretchable Conductors: A New Manufacturing Strategy

We systematically investigated the interesting electric response of the aligned CNT ribbons under mechanical strain. We found that CNTs slide on a PDMS substrate under tension, but buckle under compression (releasing). Such an irreversible mechanical deformation is responsible for the observed irreversibility in the electric resistance upon the first stretching/releasing. In addition, we found that the resistance of the buckled MWNTs remains constant under mechanical strain, which explains why the resistance of the CNT ribbon did not change for the second and subsequent stretching/releasing.


Derek Warner's picture

Postdoctoral Position at Cornell: Modeling the Chemo-Mechanics of Deformation and Fracture via a Concurrent Multiscale Approach



A postdoctoral position is available in the Computational Mechanics and Materials
Group within the School of Civil and Environmental Engineering at Cornell
University (http://ceeserver.cee.cornell.edu/dhw52/index.shtml).
The project will involve the application of ab-initio atomistic modeling
techniques to illuminate the mechanisms by which impurities and environment
influence the mechanical failure of engineering materials.


Lifeng Wang's picture

One PhD Position Available in Mechanics of Materials

One PhD position is available immediately in the Department of Civil & Environmental Engineering at Clarkson University, NY, US.  The research program focuses on the mechanical behaviors of advanced materials including polymer microstructures, composites, nanomaterials, and biological materials. Interdisciplinary collaborations are possible. The candidates with background and interest in engineering mechanics, solid mechanics, and materials science are highly encouraged to apply.

If you are interested, please contact Dr. Wang at lifwang@clarkson.edu (http://www.clarkson.edu/cee/faculty/wang.html). 


Raihan.Rumman's picture

Presentations on Rare Metal Required

I was looking for some decent presentations on Rare Metals, and was at a loss in finding some. It would be great if anyone could direct me to anything related to rare metals, especially on presentation form. My email is rummantdm@yahoo.com.

Regards

Raihan Rumman

Researcher

Kongju National University, South Korea 


Nanoindentation: Oliver & Pharr Analysis

Dear Members,

I am very new to field of nanoindentation and my question might appear too simple.

I am indenting an elastic - plastic material (polymer blend) with spherical indenter. I am well verse with hertz contact mechancis theory and indentation theories like Oliver & Pharr, JKR, DMT and few others.


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