InCoManD webinar | Peridynamic models for corrosion damage and fracture

Abstract

Materials degrade in various ways: some corrode, some erode, some fracture. I will discuss our recent results on quantitative predictions for these phenomena. These results are obtained using Peridynamic (PD) models, which offer new ways to simulate complex problems by eliminating restricting assumptions inherent in classical models, like differentiability of the unknowns. I will explain how these models differ from those based on partial-differential equations and show why they may offer better solutions for simulating the evolution of corrosion damage, for example. Three-dimensional models for pitting corrosion, intergranular corrosion, crevice corrosion, galvanic corrosion, and stress corrosion cracking will be presented. Since PD models tend to be computationally costly, I will present a new discretization approach, the Fast Convolution-Based Method (FCBM) for efficient PD simulations. Extensions of these models to other similar types of physical phenomena, like erosion, melting and dissolution, coupled with fracture or not, are possible.

Speaker

Dr. Florin Bobaru is the Robert W. Brightfelt Professor of Engineering in the Department of Mechanical and Materials Engineering at the University of Nebraska-Lincoln. He received his M.Sc. in Mathematics and Mechanics of Solids from the University of Bucharest, Romania in 1997, and Ph.D. in Theoretical and Applied Mechanics from Cornell University, Ithaca, NY, USA in 2001. He is one of the first contributors to peridynamic modeling for dynamic fracture and damage and has introduced peridynamics for corrosion damage. He was a Visiting Professor/Visiting Scholar at the University of Padova, Italy (2015, 2022), Caltech (2011), Cambridge University (2008), and Sandia National Laboratory (2002-2004, 2005, 2009). He organized the first Workshop on “Nonlocal Damage and Failure: Peridynamics and Other Nonlocal Models”, sponsored by the USACM and held in San Antonio, Texas, in 2013. In October 2023, he co-organized and taught an advanced course at CISM, Udine, Italy, on “Peridynamic Models for Material Degradation”. He is the editor of the “Handbook of Peridynamic Modeling” (2016), an Associate Editor for the “Journal of Peridynamics and Nonlocal Modeling” (Springer), and a regional editor for “International Journal of Fracture” (Springer). His paper on “Peridynamic modeling of repassivation in pitting corrosion of stainless steel” published in CORROSION journal was awarded the 2020 CORROSION Best Paper Award by NACE (now AMPP).

Practical information

Link to the webinar will be sent to you prior to the webinar by the organisers.