Materials Science and Engineering C
Checking upon the status of a submitted paper that has been with the journal for 2 weeks, we received the following response.
I will let you judge.....
D.Rittel's blog
Ballistic penetration and fragmentation of brittle targets
The attached, to appear in I.J. Impact Engng., is an attempt to simplify such very complex calculations using an incubation time concept for defects coalescence, in the spirit of Tuler and Butcher and others.
By comparing the calculations and the experiments, it seems that the approach works nicely, produces realistic results, and most of all does not necessitate complex models with too many parameters of very sophisticated FE formulations.
Enjoy
the Taylor-Quinney coefficient may depend on the loading mode....
A systematic comparison of dynamic tension, compression and shear....The TQ factor is not necessarily the same for different loading modes, emphasizing the role of the deformation micromechanisms.
Dynamic crushing of a multi-columnar structure
Experiment realized by Daniel Levy (DFL-technion). We use a Kirana ultra high speed camera and the framing rate is 500,000/second.
https://www.youtube.com/watch?v=LNWh9JDDepY&feature=youtu.be
Adiabatic shear-Dynamic recrystallization-Softening
The attached results address the extent to which the presence of a nanograined, dynamically recrystallized phase may soften a material (in that case Ti6Al4V), causing ultimately failure by shear localization.
Comments welcome.
D. Rittel
Dynamic fracture of transparent ceramic
Captured at 7.5 and 8 million fps with a Kirana camera. This is a one point impact test used to determine the dynamic flexural strength. Courtesy of Dvir Blumer and Eden Promushkin, the Dynamic Fracture Laboratory, Technion, Haifa, Israel.
https://www.youtube.com/watch?v=mhce_sEyk60&feature=youtu.be
https://www.youtube.com/watch?v=wFYQ6WGzgM0&feature=youtu.be
About adiabatic shear failure.....
Not too long ago, we identified dynamic recrystallization (DRX) as a potentially softening factor leading to the formation of adiabatic shear bands. However, the exact nature and the extent of the softening effect till remained to be assessed. The link to our new paper provides additional information on this issue.
http://www.nature.com/articles/srep37226
(the paper is also attached)
A new concept of fast vessel
When one introduces hydrodynamic concept together with protective polyurea coating into the design of fast planning boats, this is the result. Enjoy!
https://www.youtube.com/watch?v=P4_CSaDYMVQ&feature=youtu.be
phd position H2020 Marie Slodowska Curie ITN/ETN program
We are offering a PhD position to start this coming september at technion, Haifa, Israel, as advertised in the attached file.
To qualify, the candidates should hold an M.Sc. with thesis in mechanical/materials engineering and have passed the GRE with a grade of 85% or more.
The research will be experimental and numerical in character.