Blog posts
Modeling Nitinol
Hello,
I'm new in this forum and I've a problem that i can't resolve.
I need to model nitinol in Abaqus: I've red the documentation and many topic in Internet but I don't understand if I must use a VUMAT subrutine or it is sufficent the tool of user defined material in Abaqus/CAE. I need something simple like an elastoplatic behaviour with hysteresis given by the different states of austenite and martensite.
Thanks in advance,
Jam3s
Open Call for Journal Club Themes and Discussion Leaders
Attention all iMechanicians! If you have a theme you would like to see in the Journal Club next year, please feel free to:
- post it here for discussion
- send it to me via email
- reccommend discussion leaders
Thanks in advance!
Journal Club Theme of September 2009: Elasticity and Failure
Let us consider interaction of two atoms/molecules/particles. The reference distance between them corresponds to zero interaction force and zero stored energy. The interaction passes three stages with the increase of the distance. At the first stage the force increases proportionally to the increasing distance: the linear stage. At the second stage the force-distance relationship deviates from the linear proportionality: the nonlinear stage. At the third stage the force drops with the increasing distance: the separation or failure stage.
16th US National Congress on Theoretical and Applied Mechanics
The Congress will be held on 27 June – 2 July 2010, at the Pennsylvania State University. The deadline for submitting abstract is 15 October 2009.
The origins of electromechanical indentation size effect in ferroelectrics
The attached paper was recently accepted for publicaiton in Applied Physics Letters. Here we try to speculate on the origins of a type of electromechanical indentation size-effect. Although we have decent supporting evidence, I think that our assertions are still on the speculative side and hope that future experiments can shed further light on this.
Revisiting Quantum Notions of Stress
I plan to submit the attached paper on quantum mechanical definition of stress in the next few weeks. Comments and feedback are welcome. Fair amount of work has been done on stress definition in the context of classical molecular dynamics (also attracting some controversies). In contrast, there appear to be several open issues in the quantum case. Hopefully, the attached paper provides a starting point.
Multiscale Postdocs at Minnesota
Several postdoc positions are available immediately at the University of Minnesota to work on the development of a variety of cutting edge multiscale methods and atomistic simulation techniques. The work will be done in close collaboration with a group of leaders in the field including Prof. Ellad Tadmor, Prof. Richard James, Prof. Mitchell Luskin and Prof. Ryan Elliott. For more information, visit www.multiscale.umn.edu or check out the attached announcement.
Green-Lagrange Strain Components
How can it be proved that the Green-Lagrange strain components include the rigid body motions?
Postdoctoral position at Princeton University
Postdoctoral position available at Princeton University to participate in a multi-disciplinary research project sponsored by the US Army Research Office (ARO/MURI) at Princeton and Harvard Universities on: Innovative Design of Multi-Functional Adaptive Structural Materials. The candidate will be involved in the Modeling of Hierarchically Porous Material Structures Optimized for Strength and Transport. The candidate must have a strong background in Finite Element Analysis (both solid and fluid), and in Topology Optimization.