EVENT DETAILS
Title: Damage Tolerance in Biological and Engineering Structural Materials
Speaker: Robert O. Ritchie
Abstract: 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 a 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, nuclear graphite, and advanced metallic materials, such as metallic glasses and 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 engineering and natural materials, with current interests focused on bioinspired structural materials and the fracture of 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., the U.S. National Academy of Engineering, the Russian Academy of Sciences, and the Royal Swedish Academy of Engineering Sciences.
TIME Thursday October 6, 2022 at 10:00 AM - 11:00 AM
LOCATION ITW, Ford Motor Company Engineering Design Center map it
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CONTACT Joy Trehan joy.trehan@northwestern.edu
CALENDAR McCormick - Civil and Environmental Engineering (CEE)