How to determine crack length in XFEM analysis
Hi guys,
i am doing crack propagation analysis using XFEM. My model is working fine. i want to know how one can determine the length of the propagated crack against time increment. Is there any built in histroy out put variable with which one can calculate the length of the propagated crack using histroy output or is there any other way for example using pyton scripting. would be my pleasure to hear valuable comments from you guys.
Alex
Can microscopic coefficients always be derived from macroscopic coefficient (biot effective coefficient, skempton coefficient)?
Can microscopic coefficients always be derived from macroscopic coefficient?
To be more specific,
alpha: Biot-Willis coefficient, Skempton coefficient
These two parameters are derived from the macroscopic level which reflects the response of a porous material as a whole, without explicitly taking into account the individual contribution of its solid and fluid constituents.
Effect of External Normal and Parallel Electric Fields on 180^o Ferroelectric Domain Walls in PbTiO3
We impose uniform electric fields both parallel and normal to 180^o ferroelectric domain walls in PbTiO3 and obtain the equilibrium structures using the method of anharmonic lattice statics. In addition to Ti-centered and Pb-centered perfect domain walls, we also consider Ti-centered domain walls with oxygen vacancies. We observe that electric field can increase the thickness of the domain wall considerably. We also observe that increasing the magnitude of electric field we reach a critical electric field E^c; for E > E^c there is no local equilibrium configuration.
Research Fellow/Research Assistant positions for mechanism design/vibration analysis of actuators for 10 Tbits/square HD Drives
Our group has two research openings for people with expertise on mechanism design / dynamic and vibration analysis of actuators cater to 10 Tbits/square inch hard disk drives. Please send your cv to me at mpeleehp [at] nus.edu.sg (mpeleehp[at]nus[dot]edu[dot]sg) or Prof Ong CJ at mpeongcj [at] nus.edu.sg (mpeongcj[at]nus[dot]edu[dot]sg).
Postdoctoral Fellow Position in Computational Mechanics -- Accepting Applications until Position is Filled
Job description
A Postdoctoral Fellow position is available in the Computational Solid Mechanics Laboratory
(CSML) in the Division of Physical Sciences and Engineering at King Abdullah University of
Science and Technology (KAUST). Candidates with experience in one or more of the following
research areas are encouraged to apply:
(1) Constitutive modeling of materials (metals, biological tissues, polymers, gels, soft active
materials, …etc.)
Graduate Student and Postdoc opening
The Laboratory for Advanced Materials at Pittsburgh has openings for
one graduate student and one postdoctoral research fellow for 2011.
Interested applicants should send their materials to Professor Paul W.
Leu at pleu [at] pitt.edu (pleu[at]pitt[dot]edu). http://www.pitt.edu/~pleu/Research/index.html
------Graduate Students Openings------
USNCCM-11 Minisymposium on Computational Methods for Multiscale and Multiphysics Wave Phenomena
Dear colleagues,
I would like to draw your attention to the minisymposium:
Computational Methods for Multiscale and Multiphysics Wave Phenomena
at the upcoming 11th U.S. National Congress on Computational Mechanics (USNCCM-11, http://www.usnccm.org/) to be held on July 25-29, 2011 in Minneapolis, MN.
Postdoc position at MIT available immediately
We have several open postdoc positions, to be filled immediately.
The first project is focused on thermal management. The project involves the computational and theoretical analysis of graphene/graphite-metal nanocomposites and experimental work carried out by other team members. We are looking for a strong person with background in thermal and mechanical properties of materials, preferrably with background in molecular simulation.