gtg627e's picture

Journal Club Theme of May 2012: Hierarchical and Quasiperiodic Phononic Crystals and Metamaterials

Following last month’s blog by Mahmoud on the role of structure in the design of materials capable of controlling the propagation of mechanical waves, I would like to delve into the characteristics of the structure itself. The propagation of mechanical waves can be controlled via scattering induced by a material’s structure.The propagation of waves for example is significantly disturbed when their wavelength and direction become correlated with the medium’s structure. This is known as Bragg scattering and can be achieved simply by embedding voids or inclusions (of different physical properties) in a material [1].


Postdoctoral Positions at Univ. of Texas at Austin, Petroleum & Geosystems Engineering

Dr. Mukul Sharma, Professor in Dept. of Petroleum and Geosystems Engineering at the University of Texas at Austin is seeking to fill two Postdoctoral Positions.

First position will perform research and oversee projects that involve high-pressure,
high-temperature core flooding experiments with hydrocarbon mixtures.
Familiarity with PVT fluid property measurements, analytical and
materials testing techniques will be a plus. For more information or to apply for the position please visit: https://utdirect.utexas.edu/apps/hr/jobs/nlogon/120420020712


Post-doctoral Research Position at MIT: Development of Finite Element Methods for Nano-scale Structures

A post-doctoral research position is available in my MIT research group for the Development of Finite Element Methods for
Nano-scale Structures. Experience in nonlinear finite element analysis and, ideally also, the analysis of multiphysics problems
is needed. Please contact me if you are interested,  Prof. KJ Bathe, kjb@mit.edu.


Ashkan Vaziri's picture

Two Postdoc positions at Northeastern: Solid and Computational Mechanics and Biomimetic materials and structures

Two postdoctoral fellow positions at Northeastern University are available immediately. First position is focused on the analysis of the nonlinear behavior of soft matter using computational mechanics and the development and analysis of biomimetic materials and structural systems. Second position is focused on computational and solid mechanics. The research will be carried out at the High Performance Materials and Structures Laboratory (http://www.hpmsl.neu.edu/).


EnginSoftUK's picture

Metals and Alloys Webinar on Modelling: State of the Art in Casting and Forging Simulation

Thursday 14th June - 12:30pm (BST)

Register now http://bit.ly/1406webinar

Once only accessible at the high-end of manufacturing, modelling and simulation is now widely embraced by the industry as a result of increased processor speeds, the accessibility and usability of software and the reliability and robustness of the models and codes which underpin it.


Jiangshui Huang's picture

Large, uni-directional actuation in dielectric elastomers achieved by fiber stiffening

Cylindrical actuators are made with dielectric elastomer sheets stiffened with fibers in the hoop direction. When a voltage is applied through the thickness of the sheets, large actuation strains are achievable in the axial direction, with or without pre-straining and mechanical loading.  For example, actuation strains of 35.8% for a cylinder with a prestrain of 40%, and 28.6% for a cylinder without pre-strain have been achieved without any optimization. Furthermore, the actuation strain is independent of the aspect ratio of the cylinder, so that both large strains and large displacements are readily actuated by using long cylinders.


Charles Augarde's picture

Opportunities in Computational Science and Engineering, Durham University, UK.

Durham University is planning to invest in a number of new posts in computational science and engineering, and in a new research institute for Advanced Research Computing for which a director is sought. You can find details of positions of interest to iMechanica readers here: Chairs/Readers in CFD, Chemo-Geomechanics, Fracture Mechanics, Inelasticty and others.More details are on the attached flyer .

As the University says:


acaballeroj's picture

Research and Development Engineer, BBR VT International Ltd

BBR VT International Ltd
Project Leader in Research and Development 

Dear All,

Currently, at BBR VT (www.bbrnetwork.com), there is an available position within the Research and Development Department. See attachment for a complete job description and how to apply.

Dr. Antonio Caballero
Head of Technology 


Yuli Chen's picture

INTERNATIONAL WORKSHOP on COMPUTATIONAL MECHANICS of MATERIALS (IWCMM XXII) September 24 - 26, 2012, Baltimore, Maryland, USA.

The 22nd International Workshop on Computational Mechanics of Materials will be held at the Sheraton Inner Harbor Hotel, Baltimore, Maryland, USA on September 24-26, 2012. You can find information on the conference at http://iwcmm22.jhu.edu/. Please submit your abstracts at http://iwcmm22.jhu.edu/ at your earliest convenience. The deadline for abstract submission is June 15, 2012.

Chair

Somnath Ghosh


David Rawlins's picture

CMBBE 2013 Conference in Salt Lake City, Utah

SAVE THESE DATES! April 3-7, 2013

The 2013 Computer Methods in Biomechanics and Biomedical Engineering
conference will be held in Salt Lake City, Utah on April 3-7.
Abstract submission deadline: December 14, 2012
Registration deadline: February 17, 2013
Hotel reservation cutoff date: March 1, 2013
Due date for 6-page conference paper: March 15, 2013

Conference Chair:
Jeffrey A. Weiss, Ph.D.
Departments of Bioengineering and Orthopedics,
and Scientific Computing and Imaging Institute
University of Utah

Conference Co-Chair:
Gerard A. Ateshian, Ph.D.
Departments of Mechanical and
Biomedical Engineering


Post-Doc: Multiscale Simulations of Domain Structures in Thermoelectric Materials

The chair of Materials and Process Simulation at the University of Bayreuth is inviting applicants for a postdoc position available within the project “Multiscale Simulations of Domain Structures in Thermoelectric Materials” funded within the framework of the focus program SPP 1386 “Nanostructured Thermoelectrics” by the German Research Foundation (Deutsche Forschungsgemeinschaft) for a period of three years. In our project, ab-initio density functional theory and classical Monte Carlo simulations are used to investigate and optimize the domain formation in half-Heusler thermoelectrics.  


SHIH Choon Fong's picture

CONTINUITY AND CHANGE

I want to share with you my intention to step down as president of KAUST at the end of my term in November next year.  My President’s Circular announcing this to the KAUST community was sent this morning.  A global search for my successor will be initiated shortly, and until the next president comes on board, I shall continue to serve. 


Cai Shengqiang's picture

International Symposium on Current Problems in Solid Mechanics in Honor of Professor R. J. Clifton

Presentation titles in the International symposium of current problems in solid mechanics in honor of Prof. R.J. Clifton can be found in the link: http://maeresearch.ucsd.edu/markenscoff/symi_2012/symposium_program_2012.pdf


Indo-Danish Bilateral Workshop on “Future Composite Technologies for Wind Turbine Blades” October 8-9, 2012 at IIT DELHI

An Indo-Danish bilateral workshop on “Future Composite Technologies for Wind Turbine Blades” was jointly organized by the Department of Wind Energy, Technical University of Denmark and Applied Mechanics Department, Indian Institute of Technology, New Delhi, India. We think this is an exciting Workshop covering several research topics relates to wind turbine blades – design and manufacturing, new computational methods, processing and materials characterization techniques.

The Workshop will be held only two days i.e. 08th – 09th October 2012 at Indian Institute of Technology, New Delhi, India with a partial financial support provided by Danish Agency for Science Technology and Innovation, Copenhagen.


Jian ZHU's picture

Complex interplay of nonlinear processes in dielectric elastomers.

A combination of experiment and theory shows that dielectric elastomers exhibit complex interplay of nonlinear processes. Membranes of a dielectric elastomer are prepared in various states of prestretches by using rigid clamps and mechanical forces. Upon actuation by voltage, some membranes form wrinkles followed by snap-through instability, others form wrinkles without the snap-through instability, and still others fail by local instability without formingwrinkles.Membranes surviving these nonlinear processes are found to attain a constant dielectric strength, independent of the state of prestretches. Giant voltage-induced stretch of 3.6 is attained.


CliveSiviour's picture

Two funded PhD studentships in Impact Engineering at Oxford University

The Department of Engineering Science at Oxford University has recently obtained funding for a project to develop novel experimental techniques for characterising and modelling the response of rubber-like materials to impact loading.  The project will support two studentships, supervised by Dr Clive Siviour in the Solid Mechanics and Materials Engineering Group.

 


Seeking PhD Researcher in Biomedical Engineering - Computational Bone Mechanobiology/Tissue Engineering

PhD
in Biomedical Engineering

Applications are invited for a postgraduate degree by research (PhD)
in Biomedical Engineering at the National University of Ireland Galway. The
project is funded by the European Research Council.

 


Journal of the Mechanical Behavior of Biomedical Materials now accepts MATLAB figure files

You can enrich your online articles by providing supplementary MATLAB figure files with the .FIG file extension. These files will be visualized using an interactive viewer that allows readers to explore your figures within the context of the article. The FIG files can be uploaded in our online submission system, and will also be available for downloading from your online article on SciVerse ScienceDirect.

For more information, go to http://www.journals.elsevier.com/journal-of-the-mechanical-behavior-of-biomedical-materials/journal-news/option-of-including-matlab-fig-files-now-available/


ICEFA V - Not too late to register at the Early Bird Rate - Deadline 18 May 2012

Fifth International Conference on Engineering Failure Analysis, 1-4 July 2012, Hilton Hotel, The Hague, The Netherlands

To register, go to http://www.icefaconference.com


Ha Bui's picture

Postdoctoral Position at Monash: Cracking Modelling

Hi All,

I am glad to inform you that:

A post-doctoral research position is available at the Geomechanics Group of
Monash Civil Engineering Department. You will be expected
to undertake numerical modelling into fracture of soil, in particular modelling
of crack evolution during desiccation. You will have a recent PhD in geomechanics, applied mechanics or in a related
field. Other qualifications include a strong background in
continuum/discontinuum mechanics and numerical modelling. Experience in
fracture mechanics modelling is desirable...

Further information about this possition can be found at:


bazant's picture

Objective Stress Rates in Finite Strain of Inelastic Solid and Their Energy Consistency

In many practical problems of solid mechanics, it is sufficient to characterize material deformation by the small (or linearized) strain tensor. But there are also many problems where the finiteness of strain must be taken into account. These are of two kinds: 1) Large nonlinear elastic deformations possessing a potential energy (exhibited, e.g., by rubber), in which the stress components are obtained as the partial derivatives of potential energy; and 2) inelastic deformations possessing no potential, in which the stress-strain relation is defined incrementally and the stress increment or rate must be formulated objectively (i.e., independently of coordinate rotations). The present paper reviews the latter kind.


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