TY - JOUR

T1 - Peridynamic modelling of the dynamic crack initiation

AU - Ignatev, Maksim

AU - Kazarinov, Nikita

AU - Petrov, Yuri

N1 - Publisher Copyright: © 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) Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2020

Y1 - 2020

N2 - In the present work the problem of dynamic crack initiation in the brittle solid body was studied using the non-classical approaches of continuum mechanics: peridynamics and incubation time fracture model. For this purpose, structural and incubation time criteria were formulated as criteria of the bond failure. These approaches consider the stress fields in the vicinity of the crack tip, therefore the stress-based failure criteria of the bonds were suggested. Despite the fact that both approaches consider the fracture process as a sequential failure of the structural blocks of a small certain size, which is a material constant, an element size independent approach was proposed. Damage models were implemented in the open-source peridynamic numerical package Peridigm for the state based ordinary material model. As a result, numerically obtained stress intensity factor (SIF) - fracture initiation time dependence fits well the experimental data found in works by Ravi-Chandar K., Knauss W.G., (1984a).

AB - In the present work the problem of dynamic crack initiation in the brittle solid body was studied using the non-classical approaches of continuum mechanics: peridynamics and incubation time fracture model. For this purpose, structural and incubation time criteria were formulated as criteria of the bond failure. These approaches consider the stress fields in the vicinity of the crack tip, therefore the stress-based failure criteria of the bonds were suggested. Despite the fact that both approaches consider the fracture process as a sequential failure of the structural blocks of a small certain size, which is a material constant, an element size independent approach was proposed. Damage models were implemented in the open-source peridynamic numerical package Peridigm for the state based ordinary material model. As a result, numerically obtained stress intensity factor (SIF) - fracture initiation time dependence fits well the experimental data found in works by Ravi-Chandar K., Knauss W.G., (1984a).

KW - Brittle fracture

KW - Dynamic fracture

KW - Fracture criterion

KW - Incubation time

KW - Peridynamics

UR - http://www.scopus.com/inward/record.url?scp=85099804539&partnerID=8YFLogxK

U2 - 10.1016/j.prostr.2020.10.138

DO - 10.1016/j.prostr.2020.10.138

M3 - Conference article

AN - SCOPUS:85099804539

VL - 28

SP - 1650

EP - 1654

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

SN - 2452-3216

T2 - 1st Virtual European Conference on Fracture, VECF 2020

Y2 - 29 June 2020 through 1 July 2020

ER -