PSI - Issue 26

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 26 (2020) 251–255

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers Abstract Various types of graphite have gained interest in many industrial applications due to their high strength and excellent heat tolerance. However, due to the brittle nature of this material, presence of stress concentrators such as notches and geometrical discontinuities considerably re-duces the overall loading bearing of the graphite components. Here we evaluate the applicability of the Cohesive Zone Model (CZM) for the assessment of the fracture strength of experimentally tested U-notched specimens subject to mode I loading. The fracture loads of U-notched components with different notch tip radii can be predicted with an average discrepancy of ±7%. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) s i The 1 st Mediterranean Conference on Fracture and Structural Integrity, MedFract1 Fracture assessment of U-notched graphite specimens by means of cohesive zone model S.M.J. Razavi a, *, H.R. Majidi b , F. Berto a , M.R. Ayatollahi b a Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), Richard Birkelands vei 2b, 7491, Trondheim, Norway b Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16846, Tehran, Iran

Peer-review under responsibility of MedFract1 organizers Keywords: Brittle fracture; Cohesive zone model; Graphite; U-notch.

1. Introduction Due to great applications of notched components in engineering brittle components, it is essential to develop proper brittle fracture models for designing notched members under different modes of loading conditions. Up to now, some well-stablished brittle fracture models on the basis of stress, energy, and combined both energy and stress evaluations, have been suggested in the topic of notch fracture mechanics (NFM) in order to investigate the

* Corresponding author. Tel.: +47-930-24492. E-mail address: javad.razavi@ntnu.no

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of MedFract1 organizers 10.1016/j.prostr.2020.06.031