We recently find that podosomes, very dynamic, self-organized structures, can function as mechanosensors. For details, see the recent issue of Current Biology.
A postdoctoral position at Sandia National Labs in Livermore, CA is available for an applied mechanics engineer with a strong background in computational constitutive model development. The work will support our current projects in the areas of continuum plasticity and failure modeling. The applicant will also be expected to implement models into Sandia computer codes for high-performance computing simulations. In addition, the candidate will collaborate with structural analysts to apply these advanced models to Sandia applications.
Metallic glass in bulk form is known to have superb strength and elastic response but very limited plastic deformation ability. Through machining the metaillinc glass into submicometer pillars, experiment found that metallic glass can actually sustain very large plastic doformation (see attached Figure). The detail of this finding can be found in our most recent publication: Z. W. Shan et al, Plastic flow and failure resistance of metallic glass: Insight from in situ compression of nanopillars, Phys. Rev. B 77, 155419 (2008) (6 pages).
Hello from Adelaide, Australia. I'm at the IUTAM Congress. The big news today: the 2012 IUTAM Congress will be held in Beijing. The Chinese delegates made a brilliant bidding. Among promised items are good food, low registration fee (which will pay for all lunches), National Conference Center in the Olympic Village, and a tour to the Great Wall (which is also included in the registration fee). So start planning for the trip.
The 7th International Conference on Fatigue Damage of Structural Materials will be held in Hyannis, Mass., USA, 14-19 September. Hyannis is situated 80 mi/130 km from Boston's Logan International Airport and is easily reached either by car or by public transport.
The full oral and poster programs, as well as registration details can be found on the conference website at www.fatiguedamage.elsevier.com
A postdoctoral position is immediately available in the areas of multiscale/multiresolution formulations and analysis in computational mechanics/physics. The project entails investigation of stochastic upscaling techniques and derivations of reduced-order models. Interested applicants should preferably have backround in uncertainty modeling and/or statistical learning. Proficiency in scientific computing and programming is necessary.
Inquiries and applications (including a detailed CV with names of three references) should be directed to:
Postdoctoral Research Position – Computational Solid Mechanics Weapons and Materials Research Directorate (WMRD, US Army Research Laboratory (ARL) Aberdeen Proving Ground, MD WMRD has an immediate opening for a postdoctoral research associate to conduct research in high rate damage and failure of ductile and brittle materials. Researcher would be part of a team that includes scientists at WMRD/ARL and faculty and students in Mechanical Engineering and Materials Science at The Johns Hopkins University under a Cooperative Research Agreement.
In December 2006 the ASME Applied Mechanics Division (AMD) Executive Committee approved a new technical committee, Committee on Fluid-Structure Interaction (CFSI). The CFSI is sponsoring 6 mini-symposia within Track 12 "Mechanics of Solids, Structures and Fluids" of the ASME International Mechanical Engineering Congress, in Boston, October 31 - November 6, 2008. These 6 mini-symposia will have a total of 17 sessions and are titled:
We have studied experimentally and theoretically the response of randomly folded hyperelastic and elastoplastic sheets on the uniaxial compression loading and the statistical properties of crumpling networks. The results of these studies reveal that the mechanical behavior of randomly folded sheets in the one-dimensional stress state is governed by the shape dependence of the crumpling network entropy.
The deadline for early-bird registration, with a $50 saving, is 28 August 2008. Please consider to register for the Applied Mechanics Division Honors & Awards Banquet to meet your friends, and to congratulate the winners.
Dusan Krajcinovic received his Bachelor’s and Master’s degrees in Civil Engineering from the University of Belgrade (1958, 1966) and his PhD in Civil Engineering from Northwestern University in 1968, working with Prof. George Hermann.
One J.W. and I.C.M. Roderick scholarship (Stipend + Tuition if applicable) is available for a suitably qualified student with an Honours degree (or equivalent) in Engineering to undertake full time research leading to a PhD degree in the School of Civil Engineering.
I am trying to develop a model in ABAQUS and perform crack analysis using FRANC3D. I am having a problem right at the beginning.
I am able to create the model in ABAQUS and write the .inp file. I open this file in FRANC3D and am trying to insert a curved crack. I repeat a 'curved crack'. The crack is not planar. When I try to define the crack front using 'user defined points', the software is approximating all the points I enter to a best-fit 'plane'. So it is generating a planar crack when i wanta curved crack.
As a follow up to my first blog , I would like to know if the experimental data of applied loads and crack sizes or lengths, are sufficient to model the R-curve behaviour via the Fracture Mechanics approach.
ExxonMobil Research and Engineering Company has immediate openings in Computational Geomechanics and Rock Physics at its Corporate Strategic Research Laboratory in Annandale, NJ.
To be considered, applicants must satisfy the requirements described in the attached flyer and submit a cover letter and resume directly to the ExxonMobil website (www.exxonmobil.com/ex).
I am using exponent Drucker-Prager model at the moment, is there anyone can tell me where the follow exponent D-P eqation comes from originally?
(σ e)(σ e)=λ(σt)(σt)-3(λ-1)σmσt
Where λ= is hydrostatic stress sensitivity parameter and equal to σc/σt, σe is effective stress, σm is hydrostatic stress, σc, σt are stresses under compression and tension, respectively.
I am doing my master thesis on crash simulation of plywood (7 layers-orthotropic material) structures in buses using explicit LS-DYNA FE program. I would like to include failure in my model. Right now I am working on Mat_054_55 (MAT_ENHANCED_COMPOSITE_DAMAGE…..material model from LS-DYNA material library).
Mat_054_55 allows me to get failure by defining anyone of the following parameters,
Dusan Krajcinovic received his Bachelor’s and Master’s degrees in Civil Engineering from the University of Belgrade (1958, 1966) and his PhD in Civil Engineering from Northwestern University in 1968, working with Prof. George Hermann.
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