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Xin-Lin Gao's picture

Two recent papers - one related to head impact and the other on orthotropic Kirchhoff plates

These two papers have recently been published in Int. J. Mech. Sci. and Acta Mech.:

1) Analytical Models for the Impact of a Solid Sphere on a Fluid-Filled Spherical Shell Incorporating the Stress Wave Propagation Effect and their Applications to Blunt Head Impacts

http://www.sciencedirect.com/science/article/pii/S0020740317308949

2) A non-classical model for an orthotropic Kirchhoff plate embedded in a viscoelastic medium

Jingjie Yeo's picture

Unusually low and density-insensitive thermal conductivity of three-dimensional gyroid graphene

http://dx.doi.org/10.1039/C7NR04455K Graphene has excellent mechanical, thermal and electrical properties. However, there are limitations in utilizing monolayers of graphene for mechanical engineering applications due to its atomic thickness and lack of bending rigidity. Synthesizing graphene aerogels or foams is one approach to utilize graphene in three-dimensional bulk forms. Recently, graphene with a gyroidal geometry has been proposed.

Antonio Papangelo's picture

Load-separation curves for the contact of self-affine rough surfaces

Load separation curves between self-affine rough surfaces have been studied by means of extensive numerical simulations. The results of the comparison with the two main contact mechanics theories have been reported. https://www.nature.com/articles/s41598-017-07234-4

Influence of surface tension in the surfactant-driven fracture of particulate monolayers

Dear Colleagues,

  I thought some of you may be interested in our recent paper which has been accepted to Soft Matter.  The article is available online, here:

  http://pubs.rsc.org/en/content/articlepdf/2014/SM/C7SM01245D?page=search

   It contains a new model for the fracture of particulate rafts, and some new experimental results as well.  Questions are welcome. 

Sarah Bentil's picture

Ph.D. Research Position in Soft Tissue Mechanics (U.S. Citizens only)

 

One Ph.D. research position is available immediately at Iowa State University’s Mechanical Engineering Department in the area of soft tissue biomechanics. The candidates must be a US Citizen and have earned a B.S. degree in Mechanical Engineering, Bioengineering, or a related field. The selected candidates are expected to start no later than January 2018.

 

ktramesh's picture

Postdoc in Mechanics and Materials in Extreme Dynamic Environments

 

The Hopkins Extreme Materials Institute at Johns Hopkins University invites applications for a Postdoctoral Fellow in experimental mechanics, with an emphasis on understanding the critical mechanisms that control the behavior of materials in extreme dynamic environments. A significant part of the research is expected to include using major national facilities such as APS. It is expected that the Fellow will also help develop the intersection of experimental mechanics and data science.

Postdoc Opening: Non-reciprocity in Acoustic Systems with Nonlinear Hierarchical Internal Structure and Asymmetry

Location: Georgia Tech, School of Mechanical Engineering, Atlanta, GA
Advisor: Michael J. Leamy, Associate Professor
Funding Source: National Science Foundation (4 years; $2,000,000)

Jie. Yin's picture

Postdoc and Ph.D. opening in mechanics of mechanical metamaterials and soft robots

Applications are invited for an immediate postdoctoral associate opening and one Ph.D. opening (Spring, 2018) in mechanics and design of mechanical metamaterials and soft robotics in the Applied Mechanics of Materials Lab of Mechanical Engineering Department at Temple University, Philadelphia, PA, US.

Nanoscale Mechanics of the Solid Electrolyte Interphase on Lithiated-Silicon Electrodes

Hello Imechanica community, we have just published our study on the mechanics of SEI in Li-ion batteries. Please find the abstract and link as below. 

 

Abstract:

alicia's picture

Postdoctoral research in topology and fiber composite optimization at UC San Diego

Applications are sought for a Post-Doctoral Researcher at University of California, San Diego (USA) to join the M2DO research lab. The primary research focus is to develop topology optimization for fiber composite material. In particular the research will develop an optimization method for structural topology as well as fiber composite architecture making essential use of the finite element method for structural mechanics. The position is initially for one year with a possibility for renewal. 

rajan_prithivi's picture

How are principal planes & eigen vectors of the stress tensor related ? | An intuitive explanation

To obtain the principal planes we construct the stress tensor and find the eigen vectors. Here is an attempt to explain it more intuitively rather than the use of the formal mathematical method. Hope you enjoy this video!
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This is an educational outreach initiative targeted at all engineers interested in mechanics and seek simpler explanations. Kindly share if you learn something out of this !

Here is the link to the VIDEO

Alejandro Ortiz-Bernardin's picture

Postdoctoral Fellowship (Computational Solid Mechanics)

I am looking for highly motivated candidates to fill some postdocs positions in computational solid mechanics in Chile.

Please see details here:

http://camlab.cl/2017/07/23/postdoctoral-fellowship-2018/

 

Best,

Alejandro.

 

Post-doctoral fellow in Chile's Legato Team

Possibilities for postdoctoral fellowships in Computational Mechanics with Elena Atroshchenko in collaboration within the Legato Team http://legato-team.eu

Please apply here: http://www.conicyt.cl/fondecyt/2016/09/06/concurso-postdoctorado-2018/

If you need information, please contact Elena Atroshchenko <eatroshchenko@ing.uchile.cl>

mohsenzaeem's picture

Generalized stacking fault energies, ductilities, and twinnabilities of CoCrFeNi-based face-centered cubic high entropy alloys

Effects of Cu, Mn, Al, Ti, Mo on generalized stacking fault energies, Rice-criterion ductilities, and twinabilities of CoCrFeNi-based face-centered cubic high entropy alloys were investigated using density functional theory calculations. The calculated barrier energies and twinnabilities revealed that the addition of Ti or Mo increased the tendency of dislocation glide and deformation twinning, while addition of Mn, Cu and relatively high amount of Al facilitated dislocation gliding and martensitic transformation. Low amount of Al resulted in only dislocation gliding.

Mike Ciavarella's picture

Some Closed-Form Results for Adhesive Rough Contacts Near Complete Contact on Loading and Unloading in the Johnson, Kendall, and Roberts Regime

Michele Ciavarella  Yang Xu Robert L. Jackson

Some Closed-Form Results for Adhesive Rough Contacts Near Complete Contact on Loading and Unloading in the Johnson, Kendall, and Roberts Regime

Journal of Tribology Copyright VC 2018 by ASME JANUARY 2018, Vol. 140 / 011402-1

 

Recently, generalizing the solution of the adhesiveless random rough contact proposed

by Xu, Jackson, and Marghitu (XJM model), the first author has obtained a model for

adhesive contact near full contact, under the Johnson, Kendall, and Roberts (JKR)

Dependence of Equilibrium Griffith Surface Energy on Crack Speed in Phase-Field Models for Fracture Coupled to Elastodynamics

Phase-field models for crack propagation enable the simulation of complex crack patterns without complex and expensive tracking and remeshing as cracks grow. In the setting without inertia, the crack evolution is obtained from a variational energetic starting point, and leads to an equation for the order parameter coupled to elastostatics. Careful mathematical analysis has shown that this is consistent with the Griffith model for fracture. Recent efforts to include inertia in this formulation have replaced elastostatics by elastodynamics.

Mike Prime's picture

Amplified effect of mild plastic anisotropy on residual stress and strain anisotropy

A few of you might find this interesting. We indented a disk of aluminum in order to make a specimen with residual stress. The loading was axisymmetric. The aluminum had plastic anisotropy of about 10%. Because of that mild anisotropy, the residual stresses were anisotropic by about 40% and the residual strains were anisotropic by 100%.

The paper is free until July 31 at https://authors.elsevier.com/a/1VCA54kE0BEFT

Ruobing Bai's picture

Fatigue fracture of tough hydrogels

Dear colleagues,

Attached please find our new paper "Fatigue fracture of tough hydrogels" published on Extreme Mechanics Letters.

 

Fatigue fracture of tough hydrogels

Ruobing Bai, Quansan Yang, Jingda Tang, Xavier P. Morelle, Joost Vlassak, Zhigang Suo

ESIS's picture

Discussion of fracture paper #16 - What is wrong with pure mode I and II? A lot it seems.

It is common practice when solving boundary value problems to split the solution into a symmetric and an antisymmetric part to temporarily reduce the number of variables and the mathematical administration. As soon as the symmetric problem is solved, the antisymmetric problem, or vice versa, is almost solving itself. Any problem can be split into a symmetric and an antisymmetric part which is a relief for anyone who analyses mixed cases.

Phd and postdoc position in thermographic inspection of composites @ Ghent University (Belgium)

We are looking for a PhD and postdoc researcher in thermographic inspection of composites, in the context of NDT (NonDestructive Testing) and defect detection.

More information can be found on http://www.composites.ugent.be/PhD_job_vacancies_PhD_job_positions_compo....

Oleg Kirillov's picture

Abstract submission is open for MS-7-4 at ESMC 2018, deadline November 15, 2017

MS-7-4

http://www.esmc2018.org/drupal8/node/93

Mini-Symposium 7-4 - Instabilities in Structural Mechanics and Fluid-Structure Interactions at ESMC 2018 in Bologna. Deadline for abstract submission: November 15, 2017. Organizers: Oleg Kirillov (Northumbria University), Olivier Doare (ENSTA Paristech). Mini-symposium description:

Transportation Network Controllability PhD studentship in the Department of Computational Engineering Sciences at the University of Luxembourg

There is a PhD position in Computational Engineering and Science offered at the MobiLab Transport Research Group of the University of Luxembourg! We look for a passionate researcher who wants to study network controllability in transportation systems for 3(+1) years. If you are interested go to http://emea3.mrted.ly/1gy60

Controllability of Transportation Networks

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