Την Τρίτη 19 Μαρτίου 2024 και ώρα 19.00 θα πραγματοποιηθεί η συνεδρία υποδοχής του κ. Robert Oliver Ritchie, Καθηγητή στο Τμήμα Επιστήμης των Υλικών και Μηχανικής του Πανεπιστημίου της Καλιφόρνιας στο Berkeley των ΗΠΑ, ως Ξένου Εταίρου της Ακαδημίας Αθηνών.
Κατά τη διάρκεια της τελετής υποδοχής, ο Ακαδημαϊκός κ. Εμμανουήλ Γδούτος θα παρουσιάσει τον Καθηγητή κ. Ritchie, ο οποίος ακολούθως θα εκφωνήσει ομιλία με θέμα “Fracture Resistance in Natural and Engineering Materials”.
Η συνεδρία θα μεταδοθεί ζωντανά από τον ιστότοπο της Ακαδημίας Αθηνών μέσω του ακόλουθου συνδέσμου:
http://www.academyofathens.gr/
Ακολουθεί η περίληψη της ομιλίας του κ. Ritchie καθώς και σύντομα βιογραφικά στοιχεία.
Fracture Resistance in Natural and Engineering Materials
The ability of a material to undergo limited deformation is a critical aspect of conferring toughness as this enables the dissipation of high stresses which would otherwise cause fracture. Indeed, resistance to fracture is a compromise – a combination of two, often mutually exclusive, properties of strength and deformability. It can also be considered as a mutual competition between intrinsic damage processes that operate ahead of a crack tip to promote its advance and extrinsic crack-tip shielding mechanisms that act at, or behind, the tip to locally diminish crack-tip stresses and strains. We examine here how such interplay is utilized to derive damage-tolerance in natural materials, e.g., bone skin, fish scales, and in engineering structural materials such as aerospace ceramic-matrix composites and advanced metallic materials, such as high-entropy alloys.
Biography: Robert O. Ritchie is the H.T. & Jessie Chua Distinguished Professor of Engineering in the Materials Science & Engineering and Mechanical Engineering Departments at the University of California Berkeley. He is also Faculty Senior Scientist at the Lawrence Berkeley National Laboratory. He holds M.A., Ph.D. and Sc.D. degrees in physics/materials science from Cambridge University. Prof. Ritchie is known for his research on the fracture and fatigue of a broad range of engineering and biological materials, with current interests focused on the mechanical properties of natural materials and damage-tolerance in multiple-element metallic alloys. He is a Fellow/Foreign Member of the Royal Society and of the Royal Academy of Engineering in the U.K., and the U.S. National Academy of Engineering, the Russian Academy of Sciences and the Royal Swedish Academy of Engineering Sciences.
