MM Seminar: Prof. Norman Fleck

04.04.2024 09:00 - 04.04.2024 10:00
BME, MM Bldg. I29 (Library)

Kedves Kollégák!

Az International Union of Theoretical and Applied Mechanics (IUTAM) elnöke,
Norman Fleck, a Cambridge University mechanika professzora tart szemináriumi
előadást Stépán Gábor meghívására

Multi-material lattices: are they worth the effort?

címmel.

Időpont: április 4, csütörtök 9.00 óra
Helyszín: MM épület könyvtár, I em. 29.

Abstract
Lattices materials range from open and closed cell foams across a wide range of length scale
to micro-architectured, multi-phase solids that are manufactured by additive manufacture.
Size effects are important too: lattices with struts of small diameter are subjected to high
gradients of strain in bending and are consequently have a higher material strength than large
scale lattices. The focus of this talk is on the effect of filling of a 2D hexagonal lattice or a 3D
Kelvin lattice upon their macroscopic stress versus strain responses. To first order, the
presence of an incompressible in-fill reduces the degrees of freedom by which the lattice can
deform. Consequently, the deformation mode of the lattice can switch from bending-
dominated to stretching dominated with a large concomitant elevation to stiffness and
strength. Instabilities can develop, and cavitation plays a major role.

Brief Bio
Norman Fleck is Professor of Mechanics of Materials (since 1997), and Director of the
Cambridge Centre for Micromechanics (1990) at Cambridge University Engineering
Department. He was Head of the Mechanics, Materials and Design Division of the
Cambridge University Engineering Department 1996-2008. He conducted a PhD in metal
fatigue at Cambridge University (1980-1984), followed by post-doctoral research at
Cambridge University and at Harvard University, USA with John Hutchinson and Bernard
Budiansky. He is a leader in the experimental and theoretical mechanics of engineering
materials. He has been elected to several learned Societies (Fellow of the London Royal
Society, Fellow of the Royal Academy of Engineering, US National Academy of
Engineering, European Mechanics Society, Academia Europea and the European Academy of
Sciences). He is the currently President of IUTAM.

Updated: 10:48:01, 28.03.2024.