An extended ordinary state-based peridynamics model for ductile fracture analysis

An extended ordinary state-based peridynamics model for ductile fracture analysis

Jing Zhang, Qingsheng Yang, Xia Liu

Abstract. The present research establishes a two-step strategy to incorporate classical elastoplastic constitutive model into ordinary state-based peridynamics (OSB-PD) for ductile fracture analysis. Three length levels are notified, respectively, bond level, material particle level and bulk level. The unified Bodner-Partom theory is incorporated into the OSB-PD framework to define the bond-wise relationship between deformation state and force state. Particle-wise variables indicating plastic deformation state are extracted from connecting bonds to establish the unified ductile damage model at particle level. The damage indicator in turn exerts effects on the following plastic deformation. At present study, the collaboration among PD and unified theories amplifies the theoretical unity of PD in defining material behaviors. Simulations under quasi-static and impact loading conditions are carried out to demonstrate the effectiveness of the present model in reproducing ductile fractures at bulk level.

Keywords
Peridynamics, Meshfree Method, Elastoplastic Deformation, Fracture

Published online 9/1/2023, 7 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Jing Zhang, Qingsheng Yang, Xia Liu, An extended ordinary state-based peridynamics model for ductile fracture analysis, Materials Research Proceedings, Vol. 33, pp 294-300, 2023

DOI: https://doi.org/10.21741/9781644902677-43

The article was published as article 43 of the book Aerospace Science and Engineering

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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