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Pradeep Sharma's picture

Open Faculty Position at University of Houston in Nanomechanics, Computational Materials Science

University of Houston
Department of Mechanical Engineering
Cullen College of Engineering
Faculty Position-Nano Mechanics, Nano Materials

A question about electric displacement intensity factor of interacting cracks in piezoelectric materials

I am working on the problem of interacting cracks in piezoelectric materials. Due to the interaction of cracks, I found a non-intuitive phenomenon that the electric displacement intensity factor of the crack for some interacting profiles may be negative under some loading conditions (a tensile stress and an applied electric displacement). However, under the same loading conditions, the electric displacement intensity factor can never be negative for a single crack problem.

Harley T. Johnson's picture

Call for Abstracts: SES2008 at the University of Illinois

Abstracts are now being accepted for the 2008 Society of Engineering Science Annual Technical Meeting, to be held October 12th-15th, 2008 at the University of Illinois at Urbana-Champaign.  The conference will feature more than 30 technical symposia in Applied Mathematics, Bioengineering, Dynamics, Fluid Mechanics, Imaging, Multiscale and Nanomechanics of Solids, Mechanics of Materials, etc., as well as special symposia in honor of the 2008 SES Medalists, listed at the conference website: .

cracking analysis OF a 3-points bended sandwich beam in the negative stressed area of the beam (above the neutral axis)


I'm looking for ideas-ways to model the above mentioned thema and solutions to overcome some obstacles. Here are some observations of mine:

1) Above the neutral axis of a bended beam the stress field is negative.Furthermore the traditional type of K factors estimation in Ansys is insufficient.The reason as i believe is that we haven't relative despacements of the crack nodes along  y(normal) axis.In contradiction we have shear desplacements.So i retrieve Ki nearly zero and Kii some noticable results.(using contact elements)

thermal analysis

What are the good books to refer for thermal analysis with practical applications.

Sakdirat Kaewunruen's picture

20th Australasian Conference on the Mechanics of Structures and Materials (ACMSM20)

20th Australasian Conference on the Mechanics of Structures and Materials (ACMSM20)

Toowoomba, Queensland, Australia, 2-5 December 2008

The 20th Australasian Conference on the Mechanics of Structures and Materials (ACMSM20) will be held at the University of Southern Queensland (USQ) Toowoomba, 2-5 December 2008. The conference will be hosted by the Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, Queensland, Australia.

Postdoctoral/Research Scientist Position in Computational Mechanics in Vancouver, Canada

We are seeking a highly motivated individual to join our Vancouver research institute. This is a two-year industrial postdoctoral fellow position, which could lead to permanent employment.The successful incumbent will work with a multi-disciplinary team of scientists to develop computer models to predict mechanical properties of wood and paper products.

Markus J. Buehler's picture

Postdoc position available at MIT / bioinspired thermal management

A postdoctoral associate position at MIT is available immediately, focused on the analysis and development of bioinspired, adaptive thermal management structures, by using theoretical and atomistic multi-scale modeling and simulation.

Roozbeh Sanaei's picture

Why No New Einstein?!

My research topic is too different from string theory!. but i think this not so old opinion of Proff. Lee Smolin about world research system weaknesses is very beneficial to read. and have convincing arguments in neccessity of changes in this system. Read this. it is not related to string theory,

Roozbeh Sanaei, Cellular and molecular bioengineering, Bioengineering department, National university of singapore

Dean Eastbury's picture

Program available for 3rd IC Engineering Failure Analysis

The full program for the 3rd International Conference on Engineering Failure Analysis is available at Join your peers and take advantage of the 15% "early bird" discount by registering for this popular and well-received single stream meeting before 30 April. The conference takes place July 13-16 in the beautiful coastal town of Sitges, just a few miles from Barcelona's international airport. 

About the polycrystal plasticity

Hi everyone,

I am trying to build polycrystal plasticity model  by using UMAT subroutine in ABAQUS. As we know, the orientation of grain is always espressed by Euler's angles. What I want to know is  how to assign different initial orientations to different grains using Euler's angles in Umat subroutine. Could anybody tell me how to do? Is there any example ?

Many Thanks,


Zhigang Suo's picture

Elastic dielectrics, slides for a short tutorial

Rob Wood teaches a course on micro/nano robotics, and asks me to give a 30-minute tutorial on the theory of dielectric elastomer actuators (DEAs).  I attach my slides, which might be useful to you if you'd like to include this topic in your class.  The tutorial draws upon work in the literature, as well as recent work in my group:

Graduate Research Supplements (GRS) to Current ENG Awards to Broaden Participation

(This message was sent to iMechanica by Ken Chong, of the National Science Foundation).  This letter is to call your attention to an opportunity to broaden participation particularly of underrepresented students in Ph.D. programs in engineering through supplements to current research grants funded by the divisions in the Directorate for Engineering (ENG) at the National Science Foundation.

Amit Acharya's picture

Void expansion as wave phenomena - might damage evolution be mathematically related to fluid dynamics and turbulence?

The main idea is the following: a most natural mathematical setup for considering the motion of the void-solid interface of an expanding void is that of the traveling wave. Thus, a theory for macroscopic damage evolution may be suspected as being a homogenized version of basic theory that has such wave phenomena as an essential ingredient. This paper is a first step in probing such questions. 

Zhigang Suo's picture

6000 registered users of iMechanica

Early this week the number of registered users passed 6000.  Our growth rate remains nearly a constant, about 10 new users per day. In January Teng plotted some basic statistics of iMechanica

Jianxu Shi's picture

Research Scientist Opening on Engineering Mechanics R&D in NJ

Senior Scientist – Global
Engineering and Materials Inc. has an immediate full-time opening for this
position in its NJ Office. The ideal Candidate will have demonstrated in-depth
experience in fields of computational mechanics, mechanics of composite, and
advanced structural analysis and design. Experience in commercial FEM
application and customization is considered a plus. The successful applicant
will work on physics-based modeling, thermal-mechanical analysis, and advanced
FEM solver development. Job duties will include: development of advanced FEM
algorithms, modeling and simulation using in-house and commercial software,

Internship available in FEA of Elastomers

An internship position is available in the area of Finite Element Analysis of Elastomers in the Simulation and Modeling Group at Schlumberger, Sugar Land, TX.


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