MAE SEMINAR: Curved Structures That Can Elastically Snap-Through

Abstract:

One of the most interesting aspects of nonlinear structural behavior is the occurrence of snap-through. The sudden loss of stability under loading, often leading to an inversion of a curved structure, for example, is an event that can be either undesirable or exploited, depending on the situation. The phenomenon can occur either in a static buckling context or under dynamic (cyclic) oscillations. This talk will examine the conditions under which snap-through might occur, using plenty of motivational examples, and including some analytic/experimental verification based on thin plastic strips and 3D printing.

Bio:

Lawrie Virgin is a professor of mechanical engineering and materials science at Duke University. He is a former chair of Duke’s Department of Civil and Environmental Engineering and has been a faculty member at Duke since 1988, prior to which he received his Ph.D. from the University College London. Virgin’s research interests are centered on nonlinear mechanics, especially buckling, nonlinear vibration, and their interactions. Applications of his research include ship capsize, aeroelasticity, marine risers, rocking blocks, control, sonic fatigue, solar sails, and the dynamics of slender structures. He has also developed an interest in 3D printing and especially its use in the teaching of mechanics.