PhD Studentship: Rock Fracture and Fragmentation - Imperial College, London, UK
PhD Studentship: Rock Fracture and Fragmentation: Optimization
IMPERIAL COLLEGE, LONDON, UNITED KINGDOM
APPLICATION DEADLINE: 31 OCTOBER 2012
fracture
Problems about the Contact Roller of the 3D FE Model in ADINA
Dear everyone,
Recently I am running a 3D FE model in ADINA to
analyse the elastic-plastic fracture behaviour.
A three-point bending specimen was modeled and the specimen was
supported by a contact roller.
Here is the problem:
In a rather small loading (load line displacement was about 0.1mm),
the program indicated that “the mesh is
too distorted” and stopped running. It also showed “No convergence” and stopped if the small strain formulation was
used.
Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials
This is an accepted manuscript in Journal of the Mechanics and Physics of Solids
Title: Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials with different electromechanical crack conditions
Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona
Abstract:
Crack initiation patterns at electrode edges in multilayer ferroelectric actuators
This is the preprint of an article that will appear in Smart Materials and Structures (SMS)
Title: Crack initiation patterns at electrode edges in multilayer ferroelectric actuators
Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona
Abstract:
A new postdoctoral position in the mechanics of glassy/amorphous materials
A new postdoctoral position in the mechanics of glassy/amorphous materials is
available at the Weizmann Institute of Science. The project will focus on
strongly non-linear phenomena such as cavitation, shear-banding and fracture,
with applications to Bulk Metallic Glasses, and will involve advanced
PhD Students/Post-doctoral Associates- North Carolina State University
Our group at North Carolina State University is hiring PhD students and Post-doctoral Associates in the areas of multiscale modeling, computational mechanics, fracture, and plasticity.
Interested parties should email zikry [at] ncsu.edu, and send a cv with a few representative publications.
MA Zikry
EC FUNDED WORKSHOP ON PHYSICS BASED MODELING OF MATERIALS, Ankara, October 22-23
The objective of the workshop, co-organized by Joint Research Centre of the European Commission and Middle East Technical University, is to discuss the present status of physics based constitutive modelling of metallic materials and associated experimental methods.
The Workshop is funded by the European Commission's Integration and Enlargment Programme. There is no cost for attending the Workshop. A limited number of scholarships is available for participants from the target countries (see attached flyer).
Corrosion rates of reinforcing steel in cracked concrete
Hi all,
In the course of our project, we are monitoring the corrosion behavior of steel reinforcement in cracked concrete, while exposed to simulated sea water. Recent results are posted on our blog, http://microlab-m3c4.blogspot.nl/ ! Be sure to check them out! For more information, you can contact us, or follow us on twitter @MicrolabM3C4.
Cheers!
Rupture of a highly stretchable acrylic dielectric elastomer (VHB)
Dielectric elastomer transducers are often subject to large tensile stretches and are susceptible to rupture. Here we carry out an experimental study of the rupture behavior of membranes of an acrylic dielectric elastomer (VHB 4905). Pure-shear test specimens are used to measure force-displacement curves, using samples with and without pre-cracks. We find that introducing a pre-crack into a membrane drastically reduces the stretch at rupture. Furthermore, we measure the stretch at rupture and fracture energy using samples of different heights at various stretch-rates. The stretch at rupture is found to decrease with sample height, and the fracture energy is found to increase with stretch-rate.
This paper has appeared in the Journal of Applied Physics and can be downloaded from: