iMechanica

This is a fully funded research project at the University of Waterloo, Canada. The objective is to construct a PECVD and a UV cure chambers for porous dielectric thin film depositions. In addition to building chambers, the candidate will conduct experiments in thin film fracture and small scale deformation. Please email your CV to tttsui@uwaterloo.ca

The Computational Science and Engineering Program at the University of Illinois at Urbana-Champaign is seeking highly qualified candidates for one post-doctoral research associate position in the Center for Simulation of Advanced Rockets.

Brown University announced on May 6th 2008 that NUS president Shih Choon Fong is one of the seven honorary degree recipients in this year's commencement. The announcement reads as follows: 

For complex composite structures, I have never succeeded in finding the parameter configuration which can reach the convergence using ANSYS. Who can give me some instruction?

many researchers in industrial countries think the only problem of third world researchers is money but it is not true. I worked as a researcher for four years in one of this third world countries.

Computational and Theoretical research dont need much money as like as lab dependent research. because freeware and opensource became popular and (the copyright laws are not strict in these countries unfortunately).many experimental works also can be done with available facilities in these universities.

Hello, I am trying to run a laminted composite plate in ansys. I have all the required mechanical properties and the know how to put some of the information. So far, the many trials I did i can't extract the failure criteria results. I want to know whether the plate fails in normal, shear or compression. I appreciate if someone can give me the map of how to get to that result and at what force. what are the step that i have to take in order to get there.

thanks

Mat

I want to model a viscoelastic material using UMAT in Abaqus. I am facing two problems:

At the invitation of David Clarke on behalf of the UCSB/Los Alamos Institute of Multiscale Materials and Structures, I gave the following three lectures:

1. Large deformation and instability in dielectric elastomers
2. Large deformation and instability in swelling polymeric gels
3. Mechanics and electrochemistry of polyelectrolyte gels

The abstracts follow, and the slides are attached at the end of this post.

Here is a position for University lecturership in Engineering Science(Solid or Structural Mechanics)in association with a Tutorial fellowshiip at Pembroke College. 

Im trying to model a rotating uniform beam for 12 rotational speeds in Abaqus using c3d20 elements. As expected, "step 1 to step 5" the frequencies increase as the rotational speed is increased. However, for some strange reason, the frequencies stop varying from the fifth speed. I do get warning messages when running the input file but i cant intepret them well since Im new to Abaqus.

I believe the problem is elementary but i cant figure it out. Can anyone review or run the attached input file to let me know what I  am not doing or what exactly is wrong.

Many thanks.

5 Lectureships and 5 Post-Doctoral Research Fellowships in the EPSRC funded national Centre for Advanced Tribology at Southampton (nCATS) 

Lectureships: £32,795 to £41,545

People sometimes complain that reading iMechanica takes time.  This is because iMechanica has a large number of pages, and new pages are added frequently.  If you go directly to iMechanica, you have to load individual pages one by one.  

Scaling of fracture strength, fracture energy and toughness is an important issue when it comes to predicting the behaviour of large-scale structures on the basis of laboratory scale measurements. Historically the work of Leonardo da Vinci and Gallileo is well known, followed by the statistical weakest link theory derived by Weibull in 1939. Weibull scaling is a statistical approach assuming instantaneous failure when the weakest link in a material structure fails.

In honor of its two recent National Medal of Science recipients, Jan Achenbach and Tobin Marks, Northwestern University held a National Medal of Science Symposium on May 14.

Achenbach and Marks received their medals at a White House ceremony in July 2007. The medal honors individuals for “pioneering scientific research in a range of fields, including physical, biological, mathematical, social, behavioral and engineering sciences, that enhances our understanding of the world and leads to innovations and technologies that give the United States its global economic edge.”

In Singapore, I have seen students who lost their relatives in last earthquake. I am very sorry about this, but I think there should be lessons for us in such disasters.  Is'nt any cheap and easy way to reinforce building in the face of earthquakes? I hope such disasters make researchers concentrate on such important topics.

Hey all, I'm looking for a method of determining creep properties of polymer products that is faster than applying a stress to them for an extended period of time.  Is anyone aware of any relations between more quickly/easily attainable material properties and creep properties?  Or is there any way to simulate an extended life test in a shorter amount of time?

Thanks for you help,

wharju2@uiuc.edu

I encounter a big challenge now.

I wanna use mohr-coulomb criterion to simulate the indentation of BMGs in ABAQUS.However, there are many parameters confusing me.

We know the  mohr-coulomb can be written as:

                            τc=k0-ασn

where τc is the shear stress on the slip plane at yielding, k0 and α are constans and σn is the stress component in the direciton normal to the slip plane.

First excuse me for my poor English. Wikipedia-Style Open publish (suggested by Mike Ciavarella) can be a logical solution for many of Current publication and evaluation system problems, currently we utilize popularity for “quality warranty” and “Ranking” of papers and authors. Such factor can be a measure for evaluating the papers and authors in the new style too. The reliability of papers can even increase by this way more, Categorization of scientific papers is one of necessities of today’s scientific network.

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Building on the previous series of Auxetics Workshops and
the 1st International Conference in Exeter (2006), the 2nd
International Conference on Auxetics and Related Systems will discuss
the following topics:

Science 320, 507 (2008)
Stretchable and Foldable Silicon Integrated Circuits
Dae-Hyeong Kim, Jong-Hyun Ahn, Won Mook Choi, Hoon-Sik Kim, Jizhou Song, Yonggang Huang, Zhuangjian Liu, Chun Lu, and John A. Rogers

Recentl, in my research ,I need measure the deformation in the soil caused by the simulation of tunnelling construction in the labotory.In China, I have not found the proper devices to get the deformation occured under the simulation soil surface.Anyone who knows the devices or give me the advice will be appreciated!