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jenda_z's picture

Postdoctoral position in Advanced fly ash cementitious composites

The Czech Technical University in Prague - University Center for Energy Efficient Buildings, offers one postdoctoral position in the fields of modeling, simulation, assessment and optimization of multi-functional materials and structures.

Wenbin Yu's picture

Help compile list of available micromechanics codes

Computer simulations will be used more and more for composites design and manufacturing. Before an engineer can simulate, there are at least two questions: what are the tools available and which one works for my problem. Thus, as a start, cdmHUB plan to compile a list of micromechanics codes for the community, including commercial codes, public domain codes, or research codes. To make the list as complete as possible, we need your help.

jsegurado's picture

Reminder: Call for abstracts International Workshop on Computational Mechanics of Materials in Madrid, Spain on October 1st-3rd

This is a reminder to invite you to submit an abstract for the 24th International Workshop on
Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain on October 1st-3rd.
The abstract submission will close in
less than 3 weeks.

 

jsegurado's picture

24th International Workshop on Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain, on October 1st-3rd 2014

The abstract submission for the 24th International Workshop on
Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain, on
October 1st-3rd, 2014 is now opened. The deadline for abstract
submission is June 15th, 2014.

The workshop is intended to cover all aspects of modeling and
simulations of the mechanical behavior at different length and time
scales. The materials of interest range from traditional materials such
as metals, alloys, polymers and composites to advanced and emerging
materials and bio-materials.

"Plane Remains Plane" boundary condition in Abaqus

I am working on micromechanics modelling of steels. I need to implement  a "plane remains plane" kind of homogeneous boundary condition on some edges of my RVE of Dual Phase Steel. How can i do it by using *Equation option in Abaqus? I want to understand what all and how the nodes needs to be constrained? I am aware of "Planar Constraint" plugin in Abaqus, but some how it is not working for my RVE, so i want to go via the *EQUATION route. Any help would be greatly appreaciated.

 

Thanks ,

Danish 

Periodic Boundary Conditions vs Homogenous Boundary Conditions in 2D RVE

Hello all,

I want to simulate loading of 2D RVE of dual phase steels, by giving individual phases properties, to get homogenised mechanical properties like yield strength,  % elongation etc, using micromechanics based approach. Litterature shows people have used two kinds of boundary condition viz. Periodic boundary condition and homogenous boundary condition for this case. My doubt is two folds:

1) What is the theoretical difference between these two kinds of boundary conditions? 

Tuncay Yalcinkaya's picture

Full scholarships available at European Commission funded workshop on physics based material models in Izmir / Turkey

European Commission' s JRC (Joint Research Centre) is organizing the 3rd workshop on physics based material models and experimental observations (http://iwpmeo.org/) in collaboration with University of Oxford, Max-Planck-Institut für Eisenforschung and Middle East Technical University. The workshop will be held in Izmir/Turkey on 2-4 June 2014.

Postdoc and PhD positions in LEM3, Arts et Métiers ParisTech, Metz-Lorraine

The LEM3 laboratory (UMR 7239) of Arts et Métiers ParisTech, Metz-Lorraine announces 2 postdoc positions and 1 PhD position.

Postdoc position 1

Mechanical characterization and micromechanical modeling of bread dough. J.Rheol [http://dx.doi.org/10.1122/1.4768463]

The mechanical behavior of dough, gluten, and
starch was studied in an effort to investigate whether bread dough can be
treated as a two phase (starch and gluten) composite material. Mechanical
loading tests revealed rate-dependent behavior for both the starch and the
gluten constituents of dough. There is evidence from cryo-scanning electron
microscopy that damage in the form of debonding between starch and gluten
occurs when the sample is stretched. In addition, the Lodge material model was
found to deviate from the tension and shear stress-strain test data by a

jenda_z's picture

Multiple post-doctoral positions in the field of modeling, simulation, assessment and optimization of multi-functional materials

The Czech Technical University in Prague - University Center for Energy Efficient Buildings offers nine post-doctoral positions in the field of modeling, simulation, assessment and optimization of multi-functional materials and structures.

Start date: as soon as possible after 21 June 2013, until all positions are filled
Contract duration: until 30 June 2015 (with a critical evaluation after the first year)

ebarbero's picture

Easily calculate longitudinal compression strength of unidirectional composites

The longitudinal compression strength of unidirectional composites F1c, also called Xc, is very difficul to test for, so often you don't have the value for the particular material (fiber, matrix, volume fraction) that you wish to use. Further, just having data does not tell you what paramaters really influence its value--it is not the compressive strength of the fiber, I can assure you. So, there is a simple formula that you can use to predict its value and also to understand what are the parameters that really affect the compression strength of the composite.

Problems with numerical integration of discontinuous functions

Choose a channel featured in the header of iMechanica: 

Hi everybody,

 I am a very beginnerin doing research :-) and my topic is about "micro indentation analysis using continuum dislocation theory". I am applying high-order finite element method for this nonlinear problem.

My plan is first writing a subroutine for the element. However, when I intend to compute the internal force by using Gauss integration, I see a problem with the integrand function of some index of the internal force vector. This integrand is discontinuous function. It is therefore, I cannot get a good approximation with the standard Gauss integration. 

Problems with numerical integration of discontinuous functions

Hi everybody,

 I am a beginner in doing research :-) and my topic is about "Micro Indentation Analysis using Continuum Dislocation Theory". I am applying high-order finite element method for this nonlinear problem.

 My plan is first writing a subroutine for the element. However, when I intend to compute the internal force  by using Gauss Integration, I see a problem with the integrand function of some components of the internal force vector. This integrand is discontious function. It is therefore, I cannot get a good approximation with the standard Gauss integration.

Jean-Michel Pereira's picture

Experimental Micromechanics for Geomaterials

A joint workshop of the ISSMGE TC101-TC105: Experimental
Micromechanics for Geomaterials
will be held on 23rd-24th May
2013 at The University of Hong Kong.

Abstracts are now invited, until the 1st October 2012. They should
be 200-300 words in length, written in English, and show relevance
to the theme of the workshop. Abstracts should be sent to Ms Bridget
Lam. Email: owlam@hku.hk (subject: EXP MICRO 2013)

See also attached flyer.

Postdoc and PhD positions at Arizona State University

One postdoc and several PhD student positions are available at Arizona State University for fall 2012. Research background in at least one of the following areas is preferred.

1. Fatigue and fracture of materials and structures

2. Computational mechanics and micromechanics

3. Damage detection for composite materials

Interested candidates please send application documents to yongming.liu@asu.edu

Thanks!

Post-Doc/PhD in mechanics of grain boundaries at Max-Planck-Institut für Eisenforschung, Düsseldorf

MPI für Eisenforschung, Düsseldorf, Department for Microstructure Physics and Alloy Design
Post-Doc or PhD Position: Characterizing and modeling the mechanics of crystalline interfaces

Computer Aided Design Environment for Composites (CADEC)

CADEC is an online application that performs composite materials analysis as described in the textbook Introduction to Composite Materials Design-- Second Edition, CRC, 2010.
This web application implements the equations for:

  • Micromechanics
  • Ply Mechanics
  • Macromechanics
  • Strength
  • Damage
  • Fabric-Reinforced Composites
  • and Beams

http://www.cadec-online.com

Wenbin Yu's picture

New Release of General Purpose Micromechanics Code: VAMUCH 3.0

I am writing to let you know the release of VAMUCH 3.0,  the 3rd version of our general-purpose micromechanics code. The main new features are:

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