we are organizing a symposium on Plasticity and Fracture in Inorganic Amorphous Materials at
Condensed Matter in Paris 2014
to be held August 23 to 29, 2014.
Your experimental or theoretical contributions are highly welcome.
Please don't hesitate to contact us for more information.
The deadline for abstract submission is April 1st 2014.
Looking forward to seeing you in Paris in August,
Jean-Pierre Guin, Etienne Barhel and Erik Bitzek
Scaling theory of continuum dislocation dynamics in three dimensions: Self-organized fractal pattern formationSubmitted by Amit Acharya on Sat, 2014-02-08 14:07.
Y. S. Chen, W. Choi, S. Papanikolaou, M. Bierbaum, J. P. Sethna
We focus on mesoscopic dislocation patterning via a continuum dislocation
dynamics theory (CDD) in three dimensions (3D). We study three distinct
physically motivated dynamics which consistently lead to fractal formation in
3D with rather similar morphologies, and therefore we suggest that this is a
general feature of the 3D collective behavior of geometrically necessary
dislocation (GND) ensembles. The striking self-similar features are measured in
terms of correlation functions of physical observables, such as the GND
density, the plastic distortion, and the crystalline orientation. Remarkably,
all these correlation functions exhibit spatial power-law behaviors, sharing a
single underlying universal critical exponent for each type of dynamics
On February 7, 1934, two consecutive papers by Sir Geoffrey Ingram Taylor were received and so the dislocation theory was born and the first attempt at describing work hardening was made. Before that date, it was known that there was a big gap between the ideal and the experimentally observed shear strength. While according to the calculations, the shear strength had to be of the order of one tenth (or with finer models one thirtieth) of the shear modulus, the measured shear strength was several orders of magnitude smaller. This large discrepancy brought about Geoffrey I.Taylor, Egon Orowan and Michael Polyani to independently postulate the existence of dislocations. Papers by Orowan and Polyani were published consecutively in one volume of Zeitschrift für Physik.
Good International news on Caltech and engineering. Ares Rosakis, chair of the Division of Engineering and Applied Science,describes Caltech as “a unique species among universities…a very interesting phenomenon”.More can be found in the attachment or at the link below
1. Strain hardening and softening in nanotwinned Cu:
Nanotwinned Cu foils with about 99% coherent twin boundaries (TBs) among all the boundaries were made. These coherent
TBs, with an average spacing of 25 nm, were engineered approximately parallel to foil surfaces. Low plane-strain deformation
enhances the hardness by refining microstructure and introducing dislocations. High plane-strain deformation results in crystallographic
lattice rotation and reaction between dislocations and coherent TBs, and induces incoherent TBs, thus twin coarsening and
even diminishing of nanotwins accompanied by recovery and recrystallization, which cause softening.
Call for Abstracts for IMECE 2014: topic 11-13: Nanomaterials for Energy and publish in Journal of Nanotechnology in EngineeringSubmitted by HsiaoYing Shado... on Thu, 2014-02-06 12:50.
Way less gross than worms ;) Register today for the SIMULIA Community Conference and save $200!
Dear Colleague: You are cordially invited to participate in the Nanobrücken 2014 Nanomechanical Testing Workshop, which will take place March 26-28, 2014 at INM - Leibniz Institute for New Materials in Saarbrücken, Germany. This will be the 4th edition of the annual Nanobrücken workshop series. This year's Keynote Speaker will be Andrew Minor (University of California, Berkeley).
The Department of Civil and Environmental Engineering at the National University of Singapore (NUS) is recruiting 2 post-doctorate research fellows to pursue research on ice-structure interaction in the Keppel-NUS Corporate Laboratory. As part of the S$75 million collaboration between Keppel Corporation and NUS, the team comprising of Prof. Andrew Palmer, Dr. Bai Wei, and Dr. Pang Sze Dai, seeks to develop solutions for offshore rigs to meet the challenges of harsh arctic environments in oil and gas exploration and production.
I have an open position for a Post-doctoral researcher in the area of biomimetic materials, starting immediately. The successful candidate will explore and optimize bioinspired microarchitectures to increase the mechanical performance of engineering materials (glasses, ceramics, polymers). This work will expand on our recent progress on overcoming the brittleness of glass (http://barthelat-lab.mcgill.ca/publications.html). Materials and systems of interest include nacre-like ceramic / polymeric composites, multilayered conch-shell like composites and fish-scale inspired flexible protective systems.
I have updated my notes on the Griffith paper. I added more description on the experimental determination of surface tension of solids. Griiffith himself determined the surface tension of glass by an experimental setup. Udin et al (1949) described a setup based on the same principle. This setup is now known as the zero creep experiment.
Grants for 3rd International Workshop on Physics Based Material Models and Experimental Observations Cesme/Turkey 2-4 JuneSubmitted by Kalle Nilsson on Tue, 2014-02-04 18:57.
In 2012 and 2013 we organized very successful Workshops on
"Physics-based material models and experimental observations" funded
by the European Union's Enlargement programme. We cordially invite you to
submit an abstract to the 3rd International Workshop on Physics Based
Material Models and Experimental Observations to be held on 2-4 June
2014 in Cesme-Izmir/Turkey.
Basile Audoly - Université Pierre et Marie Curie and CNRS, Paris, France
Katia Bertoldi - University of Harvard, Cambridge, MA, USA
Davide Bigoni - Università di Trento, Italy
Alain Goriely - University of Oxford, UK
Sébastien Neukirch - Université Pierre et Marie Curie and CNRS, Paris, France
Sergio Pellegrino - California Institute of Technology, Pasadena, CA, USA
see the attachment for details on the course and the registration
The Civil Engineering Department at Universidad EAFIT in Medellín, Colombia is seeking applicants for a tenure track position in the field of Geotechnical Engineering. Interested candidates must have a PhD degree in the field. The selected candidate is expected to conduct research in the area of Geotechnical Engineering, and create and promote graduate courses.
Research Engineer Position in Microfluidics/BioMEMS at iNfinitesimal LLC
2014 James Watt PhD Scholarship available (in Multiscale Tissue Mechanics) at Heriot-Watt University, Edinburgh, UKSubmitted by Yuhang Chen on Tue, 2014-02-04 07:31.
2014 James Watt PhD Scholarship, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
More details can be found at http://home.eps.hw.ac.uk/~yc273
The applied mechanics group through its research lines in Seismic Engineering and Computational Mechanics is offering three graduate student positions at the MsC and PhD levels to conduct research in projects related to:
We would like to invite you to present your work at "Symposium on Mechanics of Soft Materials" in ASME 2014 International Mechanical Engineering Congress & Exposition ASME Congress and Exposition, Montreal's downtown convention center, 14-20 November 2014.
A multiscale modeling scheme based on peridynamic theory
Postdoctoral fellow, Center for simualtion, visualization and real time prediction (SiViRt), University of Texas at San Antonio)
Assistant Professor, Department of Mechanical Engineering, University of Texas at San Antonio
Openings at various levels are immediately available in Max-Planck Institute for Iron Research, for projects on experimental micro-mechanics and/or alloy design. The positions are in the group of Cem Tasan (Adaptive Structural Materials), in the Microstructure Physics and Alloy Design department of prof. Dierk Raabe.
For more details on the openings and the group, please visit http://asm.mpie.de.
For more information regarding the institute, please visit http://www.mpie.de
STOP! Hey, what's that sound? Everybody look what's goin' down............. in the SIMULIA Learning Community!Submitted by SIMULIA on Mon, 2014-02-03 15:42.
I think you all will be happy to hear a few amazing accomplishments that
occurred in 2013 in the SIMULIA Learning Community. We are so pleased
to announce that the SLC contains well over 12,000 members and is
growing daily - THANK YOU!!! These members include SIMULIA users,
advocates, academics, commercial customers, researchers and more!
Additionally, we received our first few CUSTOMER blog posts created and
published to the community and we could not be more excited about it.
As always, I want to emphasize that this community is for YOU. We strive
to always provide you with the most exciting and useful content on a
regular basis - so please continue to check back often!
Applications are invited for a postdoctoral position in the area of large-scale inversion and imaging using acoustic waves and high-performance computing.
At the interface between the fields of solid mechanics, acoustics and numerical modeling, the present job offer focuses on inverse problems with the aim of extending applications of the spectral-element method and petascale high-performance computing to (1) ocean acoustics and for (2) non-destructive material testing.
I cannot get the actual significance regarding the usage of Prony series and Shift factors in the material modelling of the viscoelastic material.
Please can anyone post some insights into this. Would be helpful.
please find a link to a story describing the results of a final project that I assigned for my graduate "Experimental Structural Dynamics" class. This is timely, on this Superbowl Sunday and the broad coverage of safety issues related to Football and head injuries.