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Gi-Dong Sim's picture

Ph.D. and Post-doc opportunities in ‘Small-scale mechanics and advanced microstructural characterizations’ at Texas A&M

Dr. Kevin Xie's group at Texas A&M is planning to recruit two Ph.D. students and a postdoctoral research fellow starting 2018.

 

The overarching aim of the research projects is to understand mechanics of materials at nano- and sub-micron scales by applying advanced microstructural characterization techniques such as Cs-corrected STEM, TEM- based orientation mapping, EELS, and atom probe tomography. The details of the projects are as follows:

Cover of Materials 09 (11)

Dear all,

 

An image from our paper on micromechanical testing and modelling of heterogeneous materials (hydrated cement paste) has been selected by the editors to be on the cover of the special issue of the Materials journal dedicated to discrete modelling of concrete. 

The cover page can be seen here: https://www.researchgate.net/publication/315897827_Cover_of_Materials_09_11

Self-Sealing Cementitious Materials by Using Water-Swelling Rubber Particles

Dear all,

Our group has recently published a paper on self-sealing of cementitious materials by using water-swelling rubber particles as admixtures. This is the first time that such an approach was developed to increase the water-tightness of cracks and therefore enhance the concrete durability.

The paper can be found at: https://www.researchgate.net/publication/319208857_Self-Sealing_Cementit...

Regards

Chiqun Zhang's picture

Computational modeling of tactoid dynamics in chromonic liquid crystals

Chiqun Zhang            Amit Acharya            Noel J. Walkington            Oleg D. Lavrentovich

Motivated by recent experiments, the isotropic-nematic phase transition in chromonic liquid crystals is studied. As temperature decreases, nematic nuclei nucleate, grow, and coalesce, giving rise to tactoid microstructures in an isotropic liquid. These tactoids produce topological defects at domain junctions (disclinations in the bulk or point defects on the surface). We simulate such tactoid equilibria and their coarsening dynamics with a model using degree of order, a variable length director, and an interfacial normal as state descriptors. We adopt Ericksen's work and introduce an augmented Oseen-Frank energy, with non-convexity in both interfacial energy and the dependence of the energy on the degree of order. A gradient flow dynamics of this energy does not succeed in reproducing some simple expected feature of tactoid dynamics. Therefore, a strategy is devised based on continuum kinematics and thermodynamics to represent such features. The model is used to predict tactoid nucleation, expansion, and coalescence during the process of phase transition. We reproduce observed behaviors in experiments and perform an experimentally testable parametric study of the effect of bulk elastic and tactoid interfacial energy parameters on the interaction of interfacial and bulk fields in the tactoids.

Siddiq Qidwai's picture

Employment Opportunity: Program Director, Mechanics of Materials and Structures (MoMS) Program, Division of Civil, Mechanical and Manufacturing Innovation (CMMI), National Science Foundation (NSF)

August 18, 2017

Dear Colleagues:

The Division of Civil, Mechanical and Manufacturing Innovation (CMMI) in the Directorate for Engineering (ENG) announces a nationwide search to fill a Program Director position for the Mechanics of Materials and Structures (MOMS) program.

Formal consideration of interested applications will begin September 15, 2017, and will continue until a selection is made with an intended start date of January, 2018.

Meisam. Asgari's picture

Theoretical and experimental constitutive modelling of soft materials at the nano scale: Cylindrical micellar filaments

We present theoretical and experimental descriptions of the elasticity of cylindrical micellar filaments using micro-mechanical and continuum theories, and Atomic Force Microscopy. Following our micro-mechanical elasticity model for micellar filaments [Asgari, Eur. Phys. J. E 2015, 38(9)], the elastic bending energy of hemispherical end caps is found. The continuum description of the elastic bending energy of a cylindrical micellar filament is also derived using constrained Cosserat rod theory.

Harold S. Park's picture

2 Tenure-Track Positions in Mechanical Engineering, Boston University

The Boston University Department of Mechanical Engineering anticipates two openings for tenure-track junior faculty positions, pending approval by the Provost. These positions are in Emerging Areas of Mechanical Engineering such as Additive Manufacturing, Multifunctional Materials, Photoacoustic Imaging, and Sustainable Energy Systems. 

 

Ruobing Bai's picture

Localized Deformation in Plastic Liquids on Elastomers

Dear Colleagues,

Attached please find our recent paper “Localized Deformation in Plastic Liquids on Elastomers”.

Title: Localized Deformation in Plastic Liquids on Elastomers

Authors: Xavier P. Morelle, Ruobing Bai and Zhigang Suo

Simpleware Webinar: Lattices and Additive Manufacturing for Footwear, Sep 7th 2017

Footwear Webinar

 Date: Thursday, September 7, 2017 

Time: 9:00 am PDT (West Coast) / 12:00 EDT pm (East Coast) / 5:00 pm BST (UK) / 6:00 pm CEST (Europe) 

Presented by: Matthew Flail (Footprint 3D, USA)

Johannes T.B. Overvelde's picture

PhD position @AMOLF, Amsterdam, the Netherlands: Development of a soft robotic heart

A PhD position is available in the Soft Robotic Matter group @AMOLF, Amsterdam, the Netherlands. The PhD focusses on the development of a complete soft artificial biocompatible heart. For more information and to apply, please visit the AMOLF website.

Research assistantship at IISc Bangalore

We have an immediate opening for a research assistant in the Mech Engng department at IISc Bangalore. 

Requirements:

  • Strong background in Finite element methods
  • Skill in C++ programming
  • Masters degree with specialization in computational mechanics, applied mathematics or related areas.
  • Open only to Indian citizens.

Interested candidates satisfying ALL the above requirements can write to

rram at mecheng dot iisc dot ernet dot in

Research assistantship at IISc Bangalore

We have an immediate opening for a research assistant in the Mech Engng department at IISc Bangalore. 

Requirements:

  • Strong background in Finite element methods
  • Skill in C++ programming
  • Masters degree with specialization in computational mechanics, applied mathematics or related areas.
  • Open only to Indian citizens.

Interested candidates satisfying all the above requirements can write to

rram at mecheng dot iisc dot ernet dot in

split hopkinson pressure bar (SHPB)

Hello
I am modelling a SHPB assembly together with the specimen, I seem to still be having problems with my results.In the definition of step time I encountered a problem, please advise me. When I plot my Stress/Time curve to get a pulse the graphs all seem to be wrong.My curve instead of a neat pulse is a series of undulating peaks and valleys, can you please send the same inp file simualtion shpb to me also at shahinandsanaz@gmail.com.

I know this was done a long time ago but it would be a great help if you can still find it for me.

Best regards

Erkan Oterkus's picture

PhD Opportunity at University of Strathclyde, Glasgow UK

Dear All,

 

Applications are invited for a PhD studentship on inverse Finite Element Method (iFEM) at the University of Strathclyde under the supervision of Dr Selda Oterkus and Dr Erkan Oterkus for UK/EU students. If you are interested, please send an e-mail to  selda.oterkus@strath.ac.uk

 

Best Regards,

 

Erkan

 

Pradeep Sharma's picture

(Due 31st October) Call for Nominations for the Eshelby Mechanics Award for Young Faculty

It is my pleasure to solicit nominations for the "Eshelby Mechanics Award for Young Faculty". This award, launched in 2012, is given annually to rapidly emerging junior faculty who exemplify the creative use and development of mechanics. The intent of the award is to promote the field of mechanics, especially among young researchers. While interdisciplinary work that bridges mechanics with physics, chemistry, biology and other disciplines is encouraged, the ideal awardee will demonstrate clear inspiration from mechanics in his/her research.

Call for Mini-symposia Proposals at EMI 2018 in Cambridge, MA

EMI 2018, the 2018 conference of the Engineering Mechanics Institute of ASCE will be held on May 29-June 1, 2018 at M.I.T. in Cambridge, Massachusetts.  The conference is organized by the Massachusetts Institute of Technology and the University of Massachusetts Dartmouth. 

 

Research Scientist position available at A*STAR IHPC

We are looking for a highly motivated research scientist to work in the area of applied mechanics and materials at A*STAR Institute of High Performance Computing (IHPC) in Singapore. The topic is on soft active materials and soft robots. You are expected to work on theoretical modeling and numerical implementation of finite element procedures. 

ahmedettaf's picture

A new hybrid numerical scheme for modeling elastodynamics in unbounded media with near-source heterogeneities

The Finite Difference (FD) and the Spectral Boundary Integral (SBI) methods have been used extensively to model spontaneously propagating shear cracks in a variety of engineering and geophysical applications. In this paper, we propose a new modeling approach, in which these two methods are combined through consistent exchange of boundary tractions and displacements. Benefiting from the flexibility of FD and the efficiency of spectral boundary integral methods, the proposed hybrid scheme will solve a wide range of problems in a computationally efficient way.

Majid Minary's picture

Postdoctoral Position in experimental nanostructured metals

A Postdoctoral position is available starting September 2017, in Mechanical Engineering at the University of Texas at Dallas. The focus of the research is on additive manufacturing and characterization of nanostructured metals.

Required expertise include:

- PhD in Mechanical Engineering or Materials Science or related fields.

- Hands on experience with TEM, SEM and XRD

- Strong knowledge on processing, microstructure and properties of nanostructured metals.

Postdoctoral researcher position: Multiscale modeling of carbon fiber fabrication and properties

A position of postdoctoral researcher in the Computational Materials Group at the University of Virginia is available as a result of a new collaborative project aimed at the development of advanced methods of carbon fibers fabrication from organic precursors. The postdoctoral researcher will join a multi-disciplinary research team working on optimization of atomic structure of carbon fibers through targeted experiments and multiscale modeling of chemical reactions and structural rearrangements occurring at different stages of the carbon fiber fabrication.

Ph.D. student positions, Computational Materials Group, University of Virginia

Research assistantships are available for students interested in pursuing Ph.D. degree in Materials Science and Engineering. The graduate students will join the Computational Materials Group and work on the development and application of various computational techniques (atomistic, continuum, mesoscopic) to research problems in general areas of laser – materials interactions, acoustic activation of surface processes, and investigation of properties of nanostructured materials.

2 PhD positions immediately available at University of Maryland- College Park

Two PhD positions on the MODELING AND SIMULATIONS OF FLOWS IN POLYELECTROLYTE-BRUSH-GRAFTED NANOCHANNELS are available immediately in SMIEL (Soft Matter Interfaces and Energy Laboratory) in the Department of Mechanical Engineering, University of Maryland. One of the selected students will be working with Prof. Siddhartha Das (Webpage: www.smiel.umd.edu) and the other student will work jointly with Prof. Siddhartha Das and Prof.

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