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.
Rubber fatigue testing. Displacement Controlled tests vs Force Controlled test
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Hi,
I need some advice about the next topic. I've been asked to develop a Haigh Diagram for Natural Rubber as André et al.{1} or Saintier et al. {2} do, and from it, be able to predict the fatigue life of a train suspension. This authors carried out the fatigue tests under displacement control and they considered that the sample had failed when a 1mm crack appeared, because they were studing the crack initiation.
Axisymmetric mesh in ANSYS Workbench
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Hi everybody,
I am trying to investigate a biaxial membrane inflation experiment of human aortic tissue by the help of ANSYS Workbench. Before examining the actual anisotropic tissue I however am trying to create a model based upon a hyperelastic, but still isotropic, material. I have chosen the pre-listed neoprene rubber in ANSYS Workbench.
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:
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.