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Peridynamic modelling of materials and structures

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In order to determine the deformation response of materials and structures subjected to external loading conditions, classical continuum mechanics (CCM) was introduced by disregarding the atomistic structure. CCM has been successfully applied to numerous challenging problems. However, its governing equation faced a difficulty when there is any discontinuity in the structure such as a crack, since spatial partial derivatives in its governing equation are not defined for such a condition. In order to overcome this problem, a new continuum mechanics approach, Peridynamics (PD), was recently introduced with the intention that PD equations remain always valid whether there is any discontinuity in the structure or not. This character of PD makes this new approach a powerful tool for predicting crack initiation and propagation. Moreover, PD can be considered as the continuum version of molecular dynamics. Therefore, PD can be a suitable candidate for multi-scale analysis of materials. Furthermore, PD formulation can also be extended to other fields such as thermal diffusion, moisture diffusion, etc., so that it can be used as a single platform for multiphysics analysis of materials and structures with damage prediction capability. Hence, in this seminar, a brief introduction of peridynamic theory will be given and its applications in various different areas including underwater shock response of composite materials, corrosion damage, ice fracture, hydraulic fracturing, failure in electronic packages will be presented.

Dr. Erkan Oterkus is a senior lecturer at University of Strathclyde, Glasgow. He is also the director of the newly established PeriDynamics Research Centre. Before joining Strathclyde, he was a researcher at NASA Langley Research Centre, USA where he conducted research on development of progressive damage modelling techniques. He received his PhD degree from the University of Arizona. He is the co-author of a book (Peridynamic Theory and Its Applications, Springer) and numerous journal and conference papers in the area of peridynamics, structural health monitoring and mechanics of composite materials. Dr. Oterkus was a visiting professor at Stanford University (USA), University of Padova (Italy), Otto von Guericke University (Germany) and Nihon University (Japan). Dr. Oterkus is an associate editor of Journal of Peridynamics and Nonlocal Modeling (Springer) and Sustainable Marine Structures (NASS). His research has been supported by various organizations and companies including European Commission, Defence Science and Technology Laboratory (DSTL), U.S. Air Force Laboratory, British Council, QinetiQ, Babcock, Lloyd’s Register, Samsung Electronics, ORE Catapult, TUBITAK and KIAT .

This talk is part of the Engineering Department Structures Research Seminars series.

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