PSI - Issue 28

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

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Procedia Structural Integrity 28 (2020) 1975–1980

© 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 Dependence of stress intensity factor (SIF) on crack velocity ( ! − ̇ dependence) in Homalite-100 specimens subjected to pulse loading was numerically studied. The numerical scheme is based on finite element method and incubation time fracture criterion. Experimental results from works by Ravi-Chandar and Knauss (1984a,b,c) were used. Experimentally obtained ! − ̇ dependence is characterized by considerable scatter of the SIF values. Application of the incubation time based approach made it possible to qualitatively describe scattering of the SIF values since the used fracture condition does not rely neither on critical SIF value, nor on a a priori given ! − ̇ dependence. © 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: Dynamic fracture; incubation time; crack propagation; stress intensity factor 1st Virtual European Conference on Fracture Instabilities encountered in the dynamic crack propagation process under impact loading as a natural consequence of the dynamic fracture discreetness Yuri Petrov a , Nikita Kazarinov b,c a Saint Petersburg State University, Saint Petersburg, 199034, Russia b RAS Inst Probl Mech Engng, Saint Petersburg, 199178, Russia c Emperor Alexander I St. Petersburg State Transport University, Saint Petersburg, 190031, Russia Abstract Dep ndence of tress intensity factor (SIF) on crack velocity ( ! − ̇ d p ndence) in Homalit -100 specimens subjec ed to pulse loading was numerically studied. The nu erical scheme is b se on finite element method and incubation t fr cture crit rion. Experimental r sults f om works by Rav -Chandar nd Knauss (1984a,b,c) were used. Experimentally o ta ned ! − ̇ dependen e is characterized by cons derab e scatter of the SIF values. Application of the incuba ion time based approach mad it possible to qualitativ ly describe scattering of the SIF values si the used fracture condition does not rely neither on critical SIF value, nor on a a priori given ! − ̇ dependence. © 2020 The Authors. Published by ELSEVIER B.V. This is an ope acces article under CC BY-NC-ND license (ht ps:// r ativecommons. rg/licenses/by-nc-nd/4.0) P er-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: Dynamic fracture; incubation time; crack propagation; stress intensity factor 1st Virtual European Conference on Fracture Instabilities encountered in the dynamic crack propagation process under impact loading as a natural consequence of the dynamic fracture discreetness Yuri Petrov a , Nikita Kazarinov b,c a Saint Petersburg State University, Saint Petersburg, 199034, Russia b RAS Inst Probl Mech Engng, Saint Petersburg, 199178, Russia c Emperor Alexander I St. Petersburg State Transport University, Saint Petersburg, 190031, Russia Contemporary approaches to the dynamic crack propagation problems are based on classic energy fracture criteria which involve either critical SIF values (static or dynamic) (stress intensity factor) or an a priori given SIF – crack velocity dependence ( ! − ̇ dependence), which is considered as a material property (Rosakis et al (1984)). Both variants may lead to errors, since ultimate dynamic SIF values are known to be dependent on the loading rate Ravi- Contemporary approaches to the dynamic rack propagation problems are based on classic ener y fracture criteria which involve either critical SIF values (static or dynamic) (stres intensity fact r) or an a priori given SIF – crack eloci y dependence ( ! − ̇ dependence), which is considered as a material property (Rosakis et l (1984)). Both variants may lead to errors, since ultimate dynamic SIF values are known to be dependent on the loading rate Ravi- 1. Introduction 1. Introduction

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 ope access article under t CC BY-NC-ND license (https:// r ativecommons.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.2020.11.021