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Why two different heaviside enrichment functions used in XFEM?

Submitted by abbhuiya on

I have been looking at XFEM literature for a while and wondering why do we need 2 different heaviside enrichment functions in XFEM? In paper titled "A finite element method for crack growth without remeshing" by Nicolas Moes et al.(1999), they use the following function for heaviside enrichment:

 H(x,y)={1, for y>0

             -1,for y<0}

PhD Positions are available in the Mechanical Engineering Department - University of Illinois at Chicago

Submitted by Hamed Hatami on

We are looking for candidates for doctoral positions in the areas of computational and experimental biomechanics. Candidates must have earned a M.Sc. degree in Mechanical Engineering or in a related field from an accredited University. Candidates with strong background in numerical simulations (e.g. C++ and FORTRAN programming skills, finite element analysis, and high performance computing) and/or previous experience in experimental characterization of bioogical tissues are highly desirable.

SES2016 is open for registration

Submitted by Teng Li on

Dear colleagues:

We are pleased to announce that the 53rd Annual Technical Meeting of the Society of Engineering Science (SES2016) is now open for registration at

http://ses2016.org/home/registration/

 

We look forward to seeing you at the University of Maryland, College Park in October!

Teng and Abhijit

Co-chairs, SES2016

Nominate 2016 EML Young Investigator Award

Submitted by Sulin Zhang on

The second Extreme Mechanics Letters (EML) Young Investigator Award is provided by Elsevier to honor the best paper by a young scientist which has been published in volumes 5-8 EML from 2015 to 2016. Nominations and self-nominations are encouraged. Deadline of nomination is Sept. 10, 2016. 

To nominate a paper, simply log in to your free Materials Today Account. See the link below for details. 

Simpleware Automotive Workshop, Dearborn, MI, Sep 13 2016

Submitted by Simpleware on

Date / Time: Tuesday, September 13, 2016 / 9:30 am - 12:30 pm

Location: Ford Conference & Event Center, Dearborn, MI

Fee: Free-to-attend. Pre-registration is required as places are limited

Register herehttp://simpleware.com/news-and-events/events/workshops/workshop-dearborn.html

Who should attend

A Comparison of the Elastic Properties of Graphene- and Fullerene-Reinforced Polymer Composites: The Role of Filler Morphology and Size

Submitted by chang-tsan.lu on

A recently published paper in mechanical properties of graphene polymer nanocomposites via MD simulations, by Chang-Tsan Lu, Asanka Weerasinghe, Dimitrios Maroudas and Ashwin Ramasubramaniam.

RA position is available in the University of Alabama in Huntsville

Submitted by eunseoklee on

One immediate graduate student RA position is available. The potential student will register to the department of mechanical and aerospace engineering and perform graduate research in the area of energy storage/conversion using first-principles calculations. Stipend and tuition support will be provided.

Any student who has a background in physics and/or materials science at either atomic scales or continuum scales is welcomed to email his/her CV to Prof. Eunseok Lee (eunseok.lee [at] uah.edu).

Multiscale real-space quantum-mechanical tight-binding calculations of electronic structure in crystals with defects using perfectly matched layers

Submitted by pourmatin on

<p>We consider the scattering of incident plane-wave electrons from a defect in a crystal modeled by the time-harmonic Schrödinger equation. While the defect potential is localized, the far-field potential is periodic, unlike standard free-space scattering problems. Previous work on the Schrödinger equation has been almost entirely in free-space conditions; a few works on crystals have been in one-dimension. We construct absorbing boundary conditions for this problem using perfectly matched layers in a tight-binding formulation.