PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 1310–1314

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract Applying peculiarities of irreversible deformation of fiber-metal laminates, a new analytical model is proposed. Incorporating the temporal parameters of a fiber and metal matrix enables the prediction of different deformation dependencies of glass- and carbon- reinforced fiber metal laminates depending on the metal thicknesses and strain rates. The dynamic effect of the yield drop phenomenon of glass- fiber metal laminates based on the relaxation model of plasticity for a heterogeneous material is plotted. The proposed model is capable of effectively predicting fiber metal laminates behaviour under both quasi-static and dynamic loading. © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: fiber metal laminate; strain rate, the relaxation model of plasticity, deformation diagram 1. Introduction In deformation diagrams, the effect of strain rates on the reinforced fiber of metal laminates under dynamic loading manifests itself in various ways. Typically, the effect is an increase in the maximum stress to fracture of fibre reinforced layers as the dynamic load increases. In a study by Karpov and Demeshkin (2018), Sharma et al. (2019) and Santiago and Alves (2013), dynamic deformation diagrams exhibited curves for the initial stages of plastic deformation of metal layers with higher yield stress of the composites and higher composite strengths compared to that of quasi-static diagrams. Xia et al. (2007) determined that quasi-static and dynamic deformation diagrams are not different values of the composite yield stress. Both cases show that the strength of the composite depends on the temporal parameters of a fiber and metal matrix enables the prediction of different deformation dependencies of glass- and carbon- This is cle under th C N https://creati .org/li enses/by-nc al In deformation diagrams, t to fracture of fibre reinforced layers as the dynamic load increases. In a study by Karpov and Demeshkin (2018), Sharma et al. (2019) and Santiago and Alves (2013), dynamic deformation diagrams exhibited curves for the initial stages of plastic 1st Virtual European Conference on Fracture Dynamic deformation of fiber-metal laminates depending on its metal thickness N. Selyutina a * a Saint Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia a

* Corresponding author. E-mail address: n.selyutina@spbu.ru

2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.101