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Today is Pi day and Einstein's birthday, again!

Google's logo is very cute today !  

Today is defined as Pi day, it is also Albert Einstein's birthday. Besides, today is Japaness lover's "white day".

According to Wiki, "In the 1980s the Japanese National Confectionery Industry Association launched a successful campaign to make March 14 a "reply day", where men are expected to return the favour to those who gave them chocolates on Valentine's Day, calling it White Day for the color of the chocolates being offered."

Robert G. Parker's picture

Lecturer positions at the Univ. of Michigan-Shanghai Jiao Tong Univ. Joint Institute

The University of Michigan and Shanghai Jiao Tong University have established a Joint Institute in Shanghai committed to building a world-class academic institution with educational and research missions. The UM-SJTU Joint Institute invites applications for lecturers to support its mechanical and electrical/computer engineering programs. With its unique academic mission in China, the JI offers an extraordinary academic environment. The JI is modeled on world-class US universities. The students are among China’s best.

Robert G. Parker's picture

Faculty positions (Asst, Assoc, and Prof) at the Univ. of Michigan-Shanghai Jiao Tong Univ. Joint Institute

The University of Michigan and Shanghai Jiao Tong University have established a Joint Institute in Shanghai with a commitment to build a world-class academic research and educational institution. The UM-SJTU Joint Institute invites applications for tenure-track (Assistant, Associate, and Full Professor) positions in all emerging fields of mechanical engineering and related disciplines. These positions are open to top caliber applicants from around the world.

Pradeep Sharma's picture

Paper by Ellad Tadmor & Nikhil Admal---Atomistic Definition of Stress

For both mechanicians and physicists, linking continuum concepts to the underlying microscopic characteristics of materials has remained a major preoccupation. Certainly, with the recent advent of the so-called "multiscale" modeling approaches, this topic has been brought to a sharp focus. Cauchy stress is one such continuum concept that has courted a fair amount of controversy.

R. Gabbrielli's picture

3D Auxetic model

An interesting animation by Adrian Rossiter of a 3D model showing 2D auxetic behaviour.

http://www.antiprism.com/misc/jit_cubo_oct4.gif

Lianhua Ma's picture

Maxwell stress of a dielectric elastomer subjected to electric field

 

Hello everyone,

As reported in some references, Maxwell stress of a dielectric  elastomer subjected to electric field can be determined by the following formula

P=e*E^2    (1) -------e=e0*e1, e0 is the dielectric permittivity of vacuum, e1 is the relative dielectric permittivity of the elastomer, and E is the applied electric field.

thermal analysis of welds using ANSYS

HI EVERYBODY,

I HAVE BEEN TRYING TO DO THE THERMAL ANALYSIS OF WELDS COUPLED WITH THE MECHANICAL ANALYSIS TO DETERMINE THE RESIDUAL STRESSES RESULTING IN IT.I HAVE COUPLE OF DOUBTS IN THIS CONCERN-

1.THERE IS THE USE OF FILLER MATERIAL-I KNOW ELEMENT DEATH AND BIRTH METHOD IS TO BE USED BEHIND IT,BUT DONT KNOW HOW TO APPLY IT

2.SECONDLY THE MOVING HEAT SOURCE-WHETHER ANY GAUSSIAN DISTRIBUTION IS TO APPLIED AND HOW TO GET A MOVING HEAT SOURCE.

3.WHETHER  ALL CONVECTIVE AND RADIATIVE BOUNDARY CONDITIONS HAVE TO BE APPLIED ON OTHER SURFACES SIMULTANEOUSLY.

Zhigang Suo's picture

Fracture of Rubber. Lecture 2

Fracture mechanics without invoking any field theory. In Lecture 1 on Fracture of Rubber, we considered the extension of a crack in an elastic body subject to a load. Following Rivlin and Thomas (1953), we regarded the elastic energy stored in the body as a function of two independent variables: the displacement of the load, and the area of the crack. The partial derivative of the elastic energy with respect to the area of the crack defined the energy release rate.

WaiChing Sun's picture

Lavrentiev phenomenon

Dear mechanicans,

    Can anyone explain to me what is Lavrentiev phenomenon? Thanks for your help.

 

WaiChing Sun

 

 

 

Generate softening curve

Hello,

 

I seek help from the forum regarding the following. Because I am very new to mechanics.

I have a continuum damage mechanics model with me. I have set up a problem of a typical three point bending test on a notched beam. The notch in the center of the specimen and extends from the bottom face up to the middle of the thickness. It is a plane stress problem. Now I want to simulate load-displacement curve obtained from the experiment (s).

Fundation of Fracture Theory <断裂理论基础>

Actually, I don't know much about Fracture Mechanics. This is the book that my previous teach in Beijing Inst of Tech recommended it to me. I think it is good.

Abaqus Quistio

I am working on Dental Implants and i want to define interaction in abaqus between an implant and the bone surrunding it. I am using Abaqus CAE to do it and i want to define frictional interaction with penalty method but I have problem with the penetration of implant in the bone. I've tried all the possible contact definitions such as surface to surface or node to surface. Sometimes Abaqus gives me some incredible answers for example pulling out the implant!!!! Please help me with this problem. Thank you....

knaumenko's picture

Postdoctoral Positions in the Post-Graduate School at the Otto-von-Guericke-University Magdeburg, Germany

A number of 3 year research schoolarships and PhD positions in the areas of mechanical engineering, process engineering and applied mathematics is available in the Post-Graduate School "Micro-Macro-Interactions in Structured Media and Particle Systems", Otto-von-Guericke-University Magdeburg, Germany.

Further information can be found at  http://www.uni-magdeburg.de/gkmm/free-position-new-gk.htm

Need an example of wave propagation in a plate using abaqus

Hi every body,I'm a senior student in mechanics and really I need an
example of wave propagation in a thin plate to conduct my project. At
now,main problem for me is how to apply load to get answers with
obvious wave propagtion contour plot without any thing more in just one
refelection.

Thanks in advance,

Hadishah

Fluid Cavity Modelling with Abaqus v6.8

Hallo All,

could anybody help to figure out why Keywords/parameters (Fluid Behavior and Fluid cavity) in the input

file not supported by the input file reader when imported into Abaqus v6.8:

 

How is this possible in ABAQUS?

I am trying to run UHYPER in ABAQUS 6.9EF1. I have the following questions:

1) How can I get the nodes
ID associated
with element# NOEL in UHYPER subroutine?

2) How can I get the
coordinates of the displaced nodes associated with element# NOEL in UHYPER
subroutine in the middle of the simulation? I tried to use GETVRN but it seems it does not work in
UHYPER.

Hashem Mourad's picture

Postdoctoral Positions in Computational Solid Mechanics at Los Alamos National Laboratory

The Fluid Dynamics and Solid Mechanics group at Los Alamos National Laboratory is currently seeking candidates for two post-doctoral positions in the areas of theoretical and computational solid mechanics.

Further information and application instructions can be found at http://www.hr.lanl.gov/JobListing/SingleJobAd.aspx?JobNumber=218796

rigid body-deformable body contact in ABAQUS

Hi:

 I was trying to model two beam. One is a cantiliver beam with horizontal axis and another one is beam like vertical axis rigid body. When I apply load to the 1st beam it should bend but should not exceed the rigid body. Buy in my model the 1st beam completly ignore the rigid body when deform. I am using Aabqus cae 6.9.

 Anyone has any suggestion or tips , please let me kmow.

Thanks

IMECE 2010 Student Travel Awards and Best Papers Contest

The AMD executive committee (EC) just announced the student travel awards and best paper contest for IMECE 2010. Between 10 and 15 students will be selected for travel grants of $750 each. The students who receive travel awards will also become eligible to participate in the best paper contest. This is a great opportunity for young students to present their work and meet other researchers during IMECE 2010.

Surface Roughness Modelling

My research objective is to import surface roughness (topography) data obtained from metrology instrument (in txt form) and to build a finite element model from this. can anyone has same experience as that of mine n can help me in this regard. do someone has matlab m-file to do this and can send me???

 

 

thanks in advance

..

circular plate on elastic foundation

 

Hi all

I'm looking for a reference paper to comparison the results of 

bending of circular (annular) plate rested on elastic foundation. 

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