Blog posts
Finite-Temperature Atomic Structure of 180^o Ferroelectric Domain Walls in PbTiO_3
In this letter we obtain the finite-temperature structure
of 180^o domain walls in PbTiO_3 using a quasi-harmonic
lattice dynamics approach. We obtain the temperature dependence of
the atomic structure of domain walls from 0 K up to room
temperature. We also show that both Pb-centered and Ti-centered
180^o domain walls are thicker at room temperature; domain
wall thickness at T=300 K is about three times larger than that of
T=0 K. Our calculations show that Ti-centered domain walls have a
super-mechanician?
This month's issue of SIAM news had a beautiful story of how one hard problem in mathematics was solved in less than six weeks using online collaboration. SIAM's story is not online yet, but here is another link to the same story . SIAM news refers to a "super-mathematician" coming out of several individual mathematician spread all over the world.
Suresh's group Fighting Malaria: Understanding the Biomechanical Properties of Red Blood Cells
Suresh's group Fighting Malaria: Understanding the Biomechanical Properties of Red Blood Cells
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MIT Dean of Engineering Subra |
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Nanovea Chosen by TUM of Germany to Further Research
Nanovea is proud to announce the installation of a Nano/Micro Mechanical Tester at Technische Universitat Munchen (Technical University of Munich, DE). The instrument was installed in the Department of Civil Engineering & Surveying at the CBM Center for Building Materials. The unique Nano and Micro modular capabilities of the Nanovea Mechanical Tester was chosen over several competitors. The instrument will be used to further industrial research in the mechanical behaviors of concrete and cementitious binder technology among others.
Crack Bridging. Lecture 2
These notes belong to a course on fracture mechanics
Lecture 1 introduced the crack bridging model. The model is also known as the cohesive-zone model, the Barenblatt model, or the Dugdale model. The model consists of two main ingredients:
obtaining stress-strain curve parameters
Dear All,
In one of my elastic-plastic simulations, I have used the Combined hardening model with half-cycle to model its plastic behaviour. So, I've fed in a list of values from experimental data. Now, I understand that ABAQUS uses certain parameters to generate the stress-strain curve from the data that I've provided.
Is it possible to find out these parameters used by ABAQUS?
Thanks in anticipation,
Aneesh
Post-doctoral position in atomistic modelling
The School of Mechanical and Aerospace Engineering in Nanyang Technological University, Singapore, is looking for a highly motivated researcher for a three-year Post-doctoral Fellowship in the area of atomistic/molecular dynamics modelling.
The research project is computational based and will focus on the atomistic modelling of lubricant and diamond-like carbon. The work will include molecular dynamics simulations, code programming and publications of research papers. The successful candidate will also have to work closely with scientists from A*STAR.
Linear scaling solution of the all-electron Coulomb problem in solids
In this manuscript (available at http://arxiv.org/abs/1004.1765), we present a systematically improvable, linear scaling formulation for the solution of the all-electron Coulomb problem in crystalline solids. In an infinite crystal, the electrostatic (Coulomb) potential is a sum of nuclear and electronic contributions, and each of these terms diverges and the sum is only conditionally convergent due to the long-range 1/r nature of the Coulomb interaction.