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Antonio Papangelo's picture

On mixed-mode fracture mechanics models for contact area reduction under shear load in soft materials

The fundamental problem of friction in the presence of macroscopic adhesion, as in soft bodies, is receiving interest from many experimentalists. Since the first fracture mechanics 'purely brittle' model of Savkoor and Briggs, models have been proposed where the mixed mode toughness is interpreted with phenomenological fitting coefficients introducing weaker coupling between modes than expected by the "purely brittle" model.

Pradeep Sharma's picture

(Due 30th November, 2018) 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.

Faculty Position - Department of Electrical Engineering - Stanford University

The Department of Electrical Engineering at Stanford University (http://ee.stanford.edu/) invites applications for a tenure-track faculty appointment at the junior level (Assistant or untenured Associate Professor) in the broadly defined field of electrical and computer engineering. The department is especially interested in candidates in robotics, autonomous systems, embedded systems, signal processing, control, optimization, and machine learning.

20 PhD students in Data-driven Computational Modelling

Dear colleagues, 

Luxembourg FNR is funding 20 PhD students 

https://driven.uni.lu/

Please contact the principal investigators. See attachment.

Regards,

Stéphane P.A. BORDAS

http://legato-team.eu/

Postdoc openings in modeling of additive manufacturing at the National University of Singapore

Dr. Wentao Yan's group at the Department of Mechanical Engineering, National University of Singapore, focuses on metal additive manufacturing: computational modeling, experimental validation and data analytics.

There are openings for postdoctoral fellows with competitive salary, available immediately. The initial contract will be 1 year, and can be extended on mutual agreement.

 

Ruobing Bai's picture

Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection

Dear Colleagues,

Here you can find our recent paper about hydrogel sensor for chemical detection.

Hydrogel Interferometry for Ultrasensitive and Highly Selective Chemical Detection

Authors: Mo Sun, Ruobing Bai, Xingyun Yang, Jiaqi Song, Meng Qin, Zhigang Suo, Ximin He

Abstract

Amit Acharya's picture

Plasticity implies the Volterra formulation: an example

 A demonstration through an example is given of how the Volterra dislocation formulation in linear elasticity can be viewed as a (formal) limit of a problem in plasticity theory. Interestingly, from this point of view the Volterra dislocation formulation with discontinuous displacement, and non-square-integrable energy appears as a large-length scale limit of a smoother microscopic problem. This is in contrast to other formulations using SBV functions as well as the theory of Structured deformations where the microscopic problem is viewed as discontinuous and the smoother plasticity formulation appears as a homogenized large length-scale limit.

The influence of anisotropic surface stresses and bulk stresses on defect thermodynamics in LiCoO2 nanoparticles

The demand for higher specific capacity and rate capability has led to the adoption of nanostructured electrodes for lithium-ion batteries. At these length scales, surface effects gain an appreciable impact not only on the electrochemical and mechanical behavior of the electrode material, but also on defect thermodynamics. The focus of this study is the distribution of surface-induced bulk stresses in a LiCoO2 nanoparticle and their impact on the migration of Li vacancies. LiCoO2 is a prototypical cathode material, where the diffusion of Li is mediated by the vacancy mechanism.

Postdoc position on numerical simulation of material deposition

A postdoc position is available immediately at Department of Chemical Eingeering in Universisty of Alabama. The project is focused on the numerical simulation of electrochemical growth of metals in confirmed geometry. 

The candidate should: 1. have a PhD degree in a STEM field; 2. be available soon; 3. have a strong background in numerical simulation with matlab, fortran, COMSOL, or other similar softwares; 4. be self-motivated and have good verbal and writing communication skills. 

Shuozhi Xu's picture

A Ph.D. student position in the research area of atomistic and multiscale simulation modeling at the Louisiana Tech University

The College of Engineering and Science at Louisiana Tech University is seeking self-motivated candidates for a Graduate Research Assistant (Ph.D. student) position, with the earliest starting date in Winter 2018.

Successful candidates will join the research group of Dr. Xiang (Shawn) Chen, who is in the research area of atomistic and multiscale simulation/modeling. A list of related publications can be found below: https://scholar.google.com/citations?user=qdz0cy4AAAAJ&hl=en

Tenure Track Faculty Position: Structural Mechanics, Materials, and/or Transportation

The Department of Civil and Environmental Engineering at the University of Pittsburgh invites applications for tenure-track faculty positions having an anticipated start date of September 1, 2019. These positions are part of a strategic expansion intended to support research and teaching activities of the Advanced Infrastructure Group in the broad areas of structural engineering and mechanics, civil engineering materials, and transportation.

Arzhang's picture

Mini-symposium on Current and Future Needs in Sub-microscale Vibration Analysis

We would like to invite contributions to a session on current and future needs in sub-microscale vibration analysis at the 2019 Engineering Mechanics Institute Conference at the California Institute of Technology.

Please see call for presentations attached.

Thank you.

Arzhang Alimoradi, Ph.D., P.E.

yann.charles's picture

1 years PostDoctoral Position - Universities Paris 13 & Paris 7 , Paris, France

A 1 year post Doctoral position is avalaible in France, on computational fractur mechanics. This is a join project between Univ. Paris 13 (LSPM lab), and Paris 7 (ITODYS lab).

The present postdoc subject is focused on the modeling cracking and buckling in thin films and nanostructures on stretchable substrate.

Jingjie Yeo's picture

Silica Aerogels: A Review of Molecular Dynamics Modelling and Characterization of the Structural, Thermal, and Mechanical Properties

https://doi.org/10.1007/978-3-319-50257-1_83-1 The second volume of the Handbook of Materials Modeling is now online: We reviewed the development of new empirical molecular dynamics forcefields, novel methods of generating aerogels’ percolated backbones, and compelling algorithms for characterizing their structural, mechanical, and thermal

Mike Ciavarella's picture

are fractal surfaces adhesive? a new attempt on JMPS

In 2007 I wrote a question in Imechanica, IS THERE NO PULL-OFF FOR ADHESIVE FRACTAL SURFACES?

Clearly, in 2007 this question was too hard to answer.  I pointed there that Fuller and Tabor 1975 asperity theory predicted a weird limit for a true fractal surface, that of no stickiness for any fractal dimension or amplitude, in the limit.

ftr_romeo's picture

THE SECOND INTERNATIONAL CONFERENCE ON “SUSTAINABLE MATERIALS PROCESSING AND MANUFACTURING” North West, Sun City Resort, South Africa | March 8 - 10, 2019

The Department of Mechanical Engineering Science,

Faculty of Engineering and the Built Environment is pleased to host

THE SECOND INTERNATIONAL CONFERENCE ON “SUSTAINABLE

MATERIALS PROCESSING AND MANUFACTURING”

North West, Sun City Resort, South Africa | March 8 - 10, 2019

Teng zhang's picture

Deriving a lattice model for neo-Hookean solids from finite element methods

Lattice models are popular methods for simulating deformation of solids by discretizing continuum structures into spring networks. Despite the simplicity and efficiency, most lattice models only rigorously converge to continuum models for lattices with regular shapes. Here, we derive a lattice model for neo-Hookean solids directly from finite element methods (FEM). The proposed lattice model can handle complicated geometries and tune the material compressibility without significantly increasing the complexity of the model.

Shuman_Xia's picture

SEM 2019 Fracture and Fatigue Call for Papers

Dear Colleagues,

 

We invite you to submit a paper to the 2019 Society for Experimental Mechanics (SEM) Annual Meeting in one of the many sessions in the Fatigue and Fracture Track. See below for further information on these sessions, and please forward this to others who may be interested.

 

Joost Vlassak's picture

POSTDOCTORAL FELLOW IN CALORIMETRIC SENSING SYSTEM FOR CELLULAR BIOENERGETICS

Applications are invited for a postdoctoral position in the Joost Vlassak group at Harvard University with an expected start date of October 1, 2018. This goal of this position is to develop new calorimetric sensing technologies and use these to study cellular bioenergetics and thermodynamics of materials. This highly interdisciplinary project includes the development of new devices and sensing systems, materials characterization, and cellular biology.

PhD position in modeling of solidification in Ni-base superalloys at the University of Nevada, Reno

One PhD opening is available in the Department of Materials Science and Engineering at the University of Nevada, Reno for a student with a desire to start in Spring 2019. The research group performs advanced theoretical and computational research in the areas of microstructural evolution, phase field method development, crystal plasticity, and computational methods for materials science and mechanics.

Funded PhD positions at the University of Southampton (Marie-Curie Fellows)

Two PhD positions are available at the University of Southampton in the areas of:

(1) Computational modelling of complex structures and structured materials - especially those fabricated using additive manufacturing,

https://jobs.soton.ac.uk/Vacancy.aspx?ref=1037118AK

and 

(2) Elastic and acoustic metamaterials using additive manufacturing.

https://jobs.soton.ac.uk/Vacancy.aspx?ref=1037018AK

opening for a postdoc fellow

Tissue Mechanics Lab at Georgia Tech has an immediate opening position for a Postdoc fellow. The candidate should have research experience in cardiovascular solid mechanics. Previous experience in machine learning is a plus.  For more information, please contact Dr. Sun at:

Wei Sun, Ph.D, FAHA

Associate Professor of the Wallace H. Coulter Department of Biomedical Engineering 

Zhigang Suo's picture

Chemical bond

The two slides intend to show the quantum mechancal origin of the surface energy.  The slides suplement a course on Fracture Mechanics.

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