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What's the mechanism of piezoionic effect

Any one studying the "piezoionic" effect? What's the mechanism of such an effect? What are the principal influencing factors?

mohsenzaeem's picture

Formation path of delta hydrides in zirconium by multiphase field modeling

A multiphase field model is developed to study the effects of metastable ζ and γ hydrides on the nucleation and growth of the stable δ hydrides in α zirconium matrix.  Acta Materialia 123 (2017) 235-244 

Zhigang Suo's picture

Scalar done right

Almost three years also , I posted an entry titled Scalar Done Wrong.  The entry has received a large number of comments, and 16,793 reads.  I have since tried to get scalars right.  I have just attached today’s version of my notes as a PDF file to the original entry.

Micromechanics of composites

Hi,

Is it possible to use micromechanical homogenization to simulate damage localization? The analytical procedures that I have come across, mostly gives a homogenized behavior of the composite and is suitable as long as the damage is diffused. Is there a way to obtain the behavior when the defects (for example microcracks) localize into a damage zone? Some lead or suggestions of reference materials would be of great help.

Thanks.

Rouzbeh1's picture

Research Scientist/Post-Doctoral Position in Advanced Materials at Rice University

Position Description: 

A research scientist/postdoctoral associate position in the area of synthesis and characterization of 2D materials and nanocomposites is available at Rice University. The successful candidates will work in a highly inter-disciplinary and stimulating environment.

 

Job Duties and Responsibilities: 

Assistant Professor, Computational Solid Mechanics

FacultyPositioninComputational Solid Mechanics,CornellUniversity 

Assistant Professor in Aerospace Engineering, IIT Madras, India

The Department of Aerospace Engineering at the Indian Institute of Technology, Madras is seeking to fill Assistant Professor vacancies in the following research areas.

1.      Experimental Structural Mechanics

2.      Control and Flight Mechanics of Aerospace vehicles

3.      Aircraft Design

behrad_koohbor's picture

SEM 2017: Shock & Blast - Abstract deadline extended to Oct. 31

Dear Colleagues,

We would like to invite you to submit an abstract for the Shock & Blast session under track 1 'Dynamic Behavior of Materials'. This symposium is part of the 2017 SEM Annual Conference & Exposition on Experimental and applied Mechanics to be held at Hyatt Regency Indianapolis, Indianapolis, IN, USA, June 12-15, 2017.

CABLE UNDER AXIAL LOADING: AN ANALYTICAL MODEL

The classical problem of a cable under axial load has been revisited by Weiguo Wu and Xin Cao: Mechanics model and its equation of wire rope based on elastic thin rod theory, International Journal of Solids and Structures, in press, 9 pages. On line 22 october 2016 at http://www.sciencedirect.com/science/article/pii/S0020768316303122 .

Model is applied to a multistrand ccable given in a book by Costello (1990). Axial stiffness results compare very well.   

Wenbin Yu's picture

A Better Alternative to RVE Analysis

RVE analysis is popular for computational homogenization. It can be used independently for virtual testing or as a module for multiscale modeling. Its popularity is mainly due to the maturity and acceptance of commercial finite element software. RVE analysis usually requires a 3D domain to obtain 3D properties and local fields. If a 2D RVE is used, only 2D properties and local fields are obtained. To obtain the complete set of properties, multiple analysis is needed. For example, to obtain the complete stiffness matrix, six 3D RVE analyses are needed.

Call for Papers: PVP 2017 - MF2 Application of Fracture Mechanics in Failure Assessment

2017 ASME Pressure Vessels and Piping Conference

Hilton Waikoloa Village, Waikoloa, Hawaii, USA

July 16 – 20, 2017

The ASME Materials and Fabrication Committee (M&F) is inviting papers in the technical sessions on Application of Fracture Mechanics in Failure Assessment (Topic MF-2). The papers will appear in the PVP 2017 conference proceedings and may be considered for publication in the ASME Journal of Pressure Vessel Technology (JPVT) or any other ASME archival journals.

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Acta Mechanica Sinica's picture

Acta Mechanica Sinica (Volume 32, Issue 5, 2016 ) is online now !

Acta Mechanica Sinica (Volume 32, Issue 5, 2016 ) is online now !

Dear everyone!

The fifth issue in 2016 (Volume 32, Issue 5) of Acta Mechanica Sinica (AMS) is online now.

Manufacturing challenges associated with variable stiffness composites

Can  any one tell me what are the variable stiffness composites and what are the manufacturing challeneges involved.

stefanogonella's picture

PhD positions in mechanics of advanced materials at the University of Minnesota

PhD positions in the broad area of mechanics of advanced materials are available in the group of Prof. Stefano Gonella (http://personal.cege.umn.edu/~gonella/) at the University of Minnesota.

Postdoctoral Appointee in Experimental Impact Mechanics at Sandia National Laboratories

Job Title - Experimental Mechanics Postdoctoral Appointee

Job ID - 655230

Location - Albuquerque, NM

Department - 01528

Regular/Temporary - Temporary

Full/Part Time - Full-Time

We are seeking a Postdoctoral Appointee for the Experimental Impact Mechanics Laboratory.

Key functions of this role include, but are not limited to:

amartini's picture

UC Merced - Graduate Research and Teaching Assistant Positions Available

The Mechanical Engineering program at the University of California Merced has graduate student positions, funded via Teaching or Reasearch Assistantship, for top applicants. More information about the program is available at: http://me.ucmerced.edu/. Information about how to apply is available at: http://graduatedivision.ucmerced.edu/prospective-students/how-apply.

Dr. Emin Taner ELMAS's picture

2017 The 8th International Conference on Mechanical and Aerospace Engineering (ICMAE)

Dear Colleagues,

I am Dr. Emin Taner ELMAS from İzmir, Turkey; and I am also a member of SCIEI - SCIENCE AND ENGINEERING INSTITUTE. 

As an international scientific / technical committe member, I would like to kindly announce and inform you about The 8th International Conference on Mechanical and Aerospace Engineering (ICMAE) 2017 organized by SCIEI - SCIENCE AND ENGINEERING INSTITUTE. 

Announcement of the 2016 Haythornthwaite Grants Recipients

The AMD-ASME Executive Committee is delighted to announce the 2016 recipients of the Haythornthwaite Grants. 

2016 Haythornthwaite Research Initiation Grants: 

The AMD-ASME Executive Committee selected the top four proposals for the Haythornthwaite Research Initiation Grants, each to be awarded at $20,000. The four selected recipients are:

sockalsi's picture

PhD Position in Multiscale Modeling and Experiments of Ballistic Fibers at the University of South Carolina

Applications are invited for a PhD studentship position focused on multiscale modeling (nanoscale mechanics) and experiments of high performance ballistic fibers. 

 

Qiming Wang's picture

Highly-stretchable 3D-architected Mechanical Metamaterials

Key contribution to the field: Most of exisiting additive manufacturing techologies are focused on rigid materials from rigid plastics to metals, but manufacturing sructures with both highly complex architectures and high stretchability is challenging. Here, we introduce a new stereolithography-based additive manufacturing technology to fabricate elastomer lattices with complex 3D architectures and high strechability.

Paper title: Highly-stretchable 3D-architected Mechanical Metamaterials

Qiming Wang's picture

Lightweight Mechanical Metamaterials with Tunable Negative Thermal Expansion

Key contribution to the field: Manufacturing of composite structures with tailored 3D microstructures is challenging with existing manufacturing technologies; here we introduce a new stereolithography-based additive manufacturing technology to fabricate multimaterial littice structures with nearly arbitrary 3D microarchitectures. 

paper title: Lightweight Mechanical Metamaterials with Tunable Negative Thermal Expansion

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