Cai Wei's picture

Journal Club Theme of July 15 2008: Plasticity at Sub-Micron Scales

Our topic is a continuation of the May 15 discussion led by Professor Julia Greer on “Experimental Mechanics at Nano-scale”.  The whole story about the “micro-pillars” started in 2004, when Mike Uchic et al. used focused ion beams (FIB) to make micro-pillars from pure Ni and Ni alloys that can then be uni-axially compressed by a flattened AFM tip [Science 305, 986-989, 2004].  The flow stress is found to increase with decreasing sample diameter even though there is no imposed strain gradient as in micro-indentation, bending or torsion experiments.  This finding generated a lot of excitement worldwide. 


nafemsNA's picture

NAFEMS NA 2008 Regional Summit: NAFEMS 2020 Vision of Engineering Analysis and Simulation (Hampton, VA - Oct. 29-31, 2008)

Hi everyone,

I just wanted to let everyone know about the upcoming NAFEMS North American 2008 Regional Summit: NAFEMS 2020 Vision of Engineering Analysis and Simulation. This is an excellent opportunity for academic researchers, industrial practitioners and software developers to meet for mutual benefit.

For those of who you not familiar with NAFEMS, it is a non-profit, vendor neutral, engineering analyis community.

At this moment, we have an excellent keynote line-up, including the following individuals: Prof. Ahmed Noor (Old Dominion University), Dr. Takeshi Abe (Ford Motor Company), Prof. Tom Hughes (Univ. of Texas-Austin), Prof. Mary Boyce (M.I.T.), and Dr. Joel Orr (Cyon Research).


Free video lecture collection!

Hi ,everyone I find this page very useful ,it has many free mechanical luctures,maybe you well find something useful like me .Please enjoy!

http://worldofmz.blogspot.com/search/label/Mechanical


ANSYS - Loads on deformed shape

This might be a stupid question but, is it possible to apply loads on a deformed shape in ANSYS? (after applying a set of loads, getting the deformed shape  and applying another set of loads on the deformed shape)


could you please give me a reference about multiscale fluid mechanics?

could you please give me a reference about multiscale fluid mechanics?


Mike Ciavarella's picture

The full list of journals ranked by H index --- but not the list of highlycited papers :(

After some conversation with Roozbeh which are "irritatingly useful" :) I found that this site has done already all the calculations we need http://www.scimagojr.com/  except the list of highlycited papers which remains for me the most interesting aspect and which we seem to need to do manually as we did yesterday with IJSS and JMPS at Most cited papers and H-factor of some mechanics journals -- IJSS

Some results are attached as a big PDF file.


Shaker A. Meguid's picture

3rd Int. Conference on Integrity, Reliability and Failure, Porto, Portugal

Dear Colleague:

We are pleased to bring to your attention the First Announcement & Call for Abstracts for the

3rd International Conference on Integrity, Reliability & Failure


Mogadalai Gururajan's picture

On Eshelby's two classics

Recently, a new carnival called The Giant's Shoulders has been started and the first edition of the same is out at A blog around the clock. A post of mine on the elastic stresses due to inclusions and inhomogeneities made it to the carnival. I am cross-posting the piece here since it might also be of interest to the readers of iMechanica (though I did post a short note earlier here which forms the core of this long post too).


Lee Margetts's picture

Microsoft Sponsored PhD Fellowship

Using Computational Biology to Bring Predatory Dinosaurs Back to Life

The proposed programme of research seeks to use state-of-the-art computational techniques to reverse engineer the walking cycle of a predatory dinosaur. Software for image-based modelling, parallel finite element analysis and evolutionary robotics will be coupled and deployed
over a computational Grid comprising many thousands of processors. This resource will facilitate a range of unique meta-experiments, enabling new scientific research to be undertaken that would otherwise not be possible. Not only will these experiments provide insight into the evolution of


Noel ODowd's picture

Postdoctoral research position in Fracture Mechanics at University of Limerick, Ireland

Department of Mechanical & Aeronautical Engineering, University of Limerick, Ireland

 

Postdoctoral Researcher in Fracture Mechanics  

Salary Scale: Postdoctoral Researcher €39,589- €56,143 p.a. – Maximum Starting Salary €41,488 p.a. (approx. $65,870 p.a.)  


Postdoctoral research position on X-FEM for geological faults (IFP, France)

 
Postdoctoral position for 2009
Extended Finite Element Method applied to
geological faults

 


Mike Ciavarella's picture

Most cited papers and H-factor of some mechanics journals -- IJSS

IMPORTANT UPDATE JULY 18

The full list of journals ranked by H index

It is possible to rank journals equally as authors, using e.g. the Harzing Publish or Perish sofware based on Google Scholar. I did the excercise for IJSS. It turns out the H-index is 78 (slightly higher than even the best authors in solid mechanics, but not stellar).  In the most highlycited papers, we find good names, but not stellar papers.

The results may be affected by the limitations of the software.

UPDATE:  IT APPEARS THAT HARZING HAS TWO PAPERS ON THIS IDEA, SEE ATTACHED.


Kilho Eom's picture

Mesoscopic model for mechanical characterization of protein materials

We consider the mesoscopic model of protein materials composed of protein crystals with given space group for understanding the mechanical properties of protein materials with respect to their structures. This preprint was accepted for publication at Journal of Computational Chemistry.


Joseph X. Zhou's picture

Entropy production on a single trajectory of the small system

The following PowerPoint file is from the talk which I gave in my research group recently. It is also my understanding and reading notes from a serial of papers by Prof. Udo Seifert, in which he generalized the entropy production on a single trajectory of the small system such as a molecular machine. It mainly addresses three questions:


3D modeling of composite material in ANSYS

Hi,

I am trying to model a composite material in ANSYS. I have used ANSYS for simple simulations before but I have never done composite material analysis. I have attached a simple schematic of what I am trying to model. Can you guys please help me? Any tip you can give will help. I have limited time. 

Thank you,

Basak

 


Viscoelasticity in Abaqus

Hi All,

 I would like to use Abaqus to model the viscoelastic material  behaviour of a polymer.


I have material data from a simple uniaxial creep experiment (nominal strain vs time).  I tried to use the viscoelastic material model in Abaqus.  I am a bit confused as to how I need to enter my data (what format). 

The manual says I have to specify the normalized bulk and normalized shear compliance


Discovering the power of Oofelie Multiphysics

DISCOVERY OF Oofelie V2.6,

an industrial multiphysics solution fully integrated in Samcef Field , the gui also used by all Samcef solutions.

 

About Open-Engineering and Oofelie®


Biswajit Banerjee's picture

Puzzle: What caused this failure?

Here's a puzzle for our readers.  The following image is of the surface of a failed joint followed by a picture of the joint (not the same one but a similar one) before joining.  What material is it? What caused the failure?  All manner of speculation is welcome.


Position in the oil industry

Reliability
Analysis Associates, Inc.

1440 North Lake Shore Drive, #30F,
Chicago, IL 60610

Phone:
312-274-0542;  Fax: 312-274-0574;  E-mail: reliability@nidus.com


Xuanhe Zhao's picture

Electrostriction in elastic dielectrics undergoing large deformation

Xuanhe Zhao and Zhigang Suo  We develop a thermodynamic model of electrostriction for elastic dielectrics capable of large deformation. The model reproduces the classical equations of state for dielectrics at small deformation, but shows that some electrostrictive effects negligible at small deformation may become pronounced at large deformation.


Mike Ciavarella's picture

Google launches HealthMap and PlosMedicine article -- When a mechanics web-based project?

These type of projects are interesting, when a mechanics-based one?

http://www.healthmap.org/en

An example of web-based projects

 


RoozbehSanaei's picture

Science in the youtube age



kaslantas's picture

We need a travelling long distance microscope for measurement of crack length

Hi

I am looking for a travelling long distance microscope for measurement of crack length. I will use this microscope on Instron fatigue test machine. I found some long distance microscopes on the web. But they are not appropriate for us. I attached a figure showing the travelling microscope that I would like to buy.

Do you have any suggestion about it? Where can I find it?

Thanks 


ANSYS Simulation

Dear All,

 Is there a source of free material data property files for use in ANSYS Simulation? I am looking for a file representing the properties of Neodymium Iron Boron (38) (permanent magnet material) to apply to a simulation of a motor. 

 Thanks for any help!

shneerow


Truong's picture

large deformation in gels.

I have read a slide of Prof. Suo, he mentioned the large deformation in gels. Could you give some applications of this phenomenon in practice?


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