The Dynamic Fracture Laboratory - DFL

Our new paper, with Orel Guetta is in press in Int. J. Engng. Science. This work was presented last week at DYMAT Association 2024 conference hashtag . We describe a new methodology to model shock attenuation in viscous fluids.
Modeling shock attenuation in hydrogels via frequency-dependent acoustic drag

Warm congratulations to Dr. G.G. Goviazin who received officially his diploma today.
What’s next? Working on joint papers as usual

Orel Guetta presented an excellent summary of his doctoral research, together with an awesome catering. Warm congrats, Orel Guetta!

Warm congratulations to the following two former graduate students who have been selected by the Department to receive awards for excellence in research. Amit Shavit (M.Sc.), co-advised with Dr. Keren Shem-tov will receive the Nadav Shoham award for his work on the chemistry of peri-implantitis. Dr. Gleb Gil Goviazin, co-advised with Dr. Amnon Shirizly, will receive the David and Olga Pnueli award. A real source of pride!

Yesterday was the Research Day in my department, and some of my students presented their work in progress. Here are some pics of our posters with Yahav Boim (lattices), Yehonatan Miara (dental implants) and Sagi Aharoni (bone mechanics).

Today, we had the pleasure of hosting high school students from Reali Matoss, Haifa, for a short introduction to Materials Mechanics.

Can riot-control water cannon be lethal?
The water cannon is often used by law enforcement agencies as a means to control riots. There are no obvious standards for police forces on how to use it, aim it, and most of all keep a safe distance from the protesters in order to avoid irreversible bodily harm.
In a paper to appear in International Journal of Engineering Science, co-authored with Prof. Jing Xie , Dr. María González García and co-authors, we examine numerically this issue for various impact scenarios.
The abstract is appended below. Stay tuned :-)

A riot-control water cannon is a large, supposedly nonlethal apparatus that uses pressurized water to control and disperse crowds. However, riot-control water cannons may cause personal injury if directly aimed at the human forehead, for example. Therefore, we systematically analyzed, via a numerical model, the spatio-temporal evolution of the equivalent pressure of a water cannon and its influence on the human body dynamic response, especially considering the head and neck body regions. The simulation results suggest that within10 m is a critically dangerous working distance because the impact of a water cannon will lead to the skull, cervical vertebra and brain injuries. In addition, compared to side/back impacts, frontal impacts are much more
dangerous due to a more extensive range of head movement. Oblique impact induces rotational movement on the human body, resulting in a significant risk of injury. A quantitative injury risk analysis is presented to provide safety guidance for water cannon usage.

This Wednesday, Ofer Honen presented his results for fthe M.Sc. degree in a very clear and focussed presentation. Kudos! The fan club attended the meeting.

Two beautiful videos of quasi-static (?) failure of 3D printed aluminum alloy lattices. If that is "static", I let you guess how the structure will react under impact conditions. Stay tuned. Courtesy of Yahav Boim and Amnon Shirizly (co-adviser).

Today, I was interviewed on Reshet-B regarding our new results on dental implants' degradation. In Hebrew 🙂

Research on dental implant's surface

A nice report on Technion website on our recent work with Keren Shem-tov and Amit Shavit. In Hebrew but the English version should come soon. Stay tuned

שתלים דנטליים: לא לעולם חוסן - Technion - Israel Institute of Technology שתלים דנטליים, העשויים מסגסוגות טיטניום, הם פתרון יעיל ונפוץ לשיניים חסרות. טיטניום וסגסוגות טיטניום מאופיינים, כך נהוג להניח, בתאימות ביולוגית ובאינרטיות כימית - כ....