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How Friction Evolves During an Earthquake

08-15-17

Professor Ares Rosakis, and colleagues including Professor Nadia Lapusta and Research Scientist Vito Rubino, are studying the way friction changes along a fault during a seismic event by simulating quakes in a lab. "Our unique facility … allows us for the first time to study friction point-wise and without having to assume that sliding occurs uniformly, as is done in classical friction studies," Rosakis explains. Professor Lapusta adds, “some numerical models of earthquake rupture … have used friction laws with slip-velocity dependence… It is gratifying to see those formulations validated by the spontaneous mini-earthquake ruptures in our study. " [Caltech story]

Tags: research highlights GALCIT MCE Ares Rosakis Nadia Lapusta Vito Rubino

Professor Rosakis Elected Fellow of the American Geophysical Union

07-28-17

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, has been elected a Fellow of the American Geophysical Union (AGU). This honor is given to individual AGU members who have made exceptional scientific contributions and gained prominence in their respective fields of Earth and space sciences. [AGU release]

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Professor Rosakis Named ICF Honorary Fellow and Vice President

07-21-17

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, has been named an honorary fellow of the International Congress on Fracture (ICF) which is the premier international body for promotion of worldwide cooperation among scientists and engineers concerned with the mechanics and mechanisms of fracture, fatigue, and strength of solids. He has also been elected as one of the group's three vice presidents.

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Earthquakes Can Make Thrust Faults Open Violently and Snap Shut

05-01-17

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, and colleagues at Caltech and École normale supérieure in Paris have discovered that fast ruptures propagating up toward the earth's surface along a thrust fault can cause one side of a fault to twist away from the other, opening up a gap of up to a few meters that then snaps shut. [Caltech story]

Tags: GALCIT MCE Ares Rosakis Hiroo Kanamori Harsha Bhat Vahe Gabuchian

Mechanics of Materials Across Nano to Geological Time and Length Scales

09-29-16

A symposium was organized at Brown University on September 16-17, 2016 to celebrate the technical contributions of Professor Ares Rosakis on the occasion of his 60th birthday. The symposium was chaired by Professors Pradeep Guduru, Huajian Gao, and G. Ravichandran. It brought together distinguished engineers and scientists from multiple disciplines to discussion research frontiers relating to the mechanics of materials across nano to geological time and length scales. [Symposium program] [Photos]

Tags: research highlights Guruswami Ravichandran Ares Rosakis Pradeep Guduru Huajian Gao

Professor Rosakis Elected to the National Academy of Sciences

05-03-16

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, has been elected to the National Academy of Sciences (NAS). His research interests span a wide spectrum of length and time scales and range from the mechanics of earthquake seismology, to the physical processes involved in the catastrophic failure of aerospace materials, to the reliability of micro-electronic and opto-electronic structures and devices. The National Academy of Sciences is a private organization of scientists and engineers dedicated to the furtherance of science and its use for the general welfare.[Caltech story] [List of NAS members]

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Professor Rosakis Receives the Von Kármán Medal

03-22-16

Ares Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, will receive the Theodore von Kármán Medal from the American Society of Civil Engineers. The medal recognizes distinguished achievement in engineering mechanics. Professor Rosakis is being honored for "discovering several fundamental physical phenomena in dynamic fracture of heterogeneous materials and interfaces at various length and time scales.” [Caltech story]

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Professor Rosakis Inducted Into the Academy of Athens

01-12-16

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, has been inducted into the Academy of Athens in the class of Natural Sciences for his “exceptional contributions to science, in particular in experimental science, in the mechanics of solids, and in aerospace.” He was indicated as a Corresponding Member of this selective academy - there are only 76 members in his section and class. [Video of event] [Caltech story]

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Professors Rosakis and Daraio Honored by Society for Experimental Mechanics (SEM)

06-22-15

Ares J. Rosakis, Theodore von Karman Professor of Aeronautics and Mechanical Engineering, is the 2015 recipient of the Sia Nemat-Nasser Medal “for innovative singular theoretical and experimental contributions in dynamic fracture and optical techniques, and their application to rupture faults.” The Sia Nemat-Nasser Medal is awarded by the Society for Experimental Mechanics (SEM) and recognizes an individual for distinguished, innovative, and outstanding work that has realized the impact of experimental mechanics on other scientific and engineering fields through an integrated multidisciplinary research. Professor Rosakis received the award at the 2015 SEM annual conference. At the same event Professor Chiara Daraio and colleagues received the 2015 M. Hetényi Award for best research paper published in Experimental Mechanics. Furthermore, EAS alumnus Hugh Bruck became a 2015 fellow and EAS alumnus John Lambros received the M.M. Frocht Award.

Tags: APhMS honors Chiara Daraio GALCIT Ares Rosakis Hugh Bruck John Lambros

Dr. Rittel Recognized by Academy of Sciences of Turin

06-18-15

Dr. Daniel Rittel, long term GALCIT Visiting Associate working with Professors Ravichandran and Rosakis, has been awarded the 2015 “Angiola Gili e Cataldo Agostinelli” international prize for Applied or Theoretical Mechanics by the Academy of Sciences of Turin, Italy. Dr. Rittel has performed pioneering research in the mechanics of materials, with particular focus on the coupling thermomechanical solids. His work has demonstrated that the energy stored in the material is not only due to thermodynamic effects, but also due to changes in the microstructure identified as dynamic recrystallization. His research has also led to a paradigm shift in the modeling of the localization phenomena of sliding dynamics, combining the science of materials with the mechanics using numerical simulations. [List of past recipients]

Tags: honors research highlights GALCIT Guruswami Ravichandran Ares Rosakis Daniel Rittel