An ordinary state-based peridynamic model for toughness enhancement of brittle materials through drilling stop-holes

Rahimi, Mohammad Naqib and Kefal, Adnan and Yildiz, Mehmet and Oterkus, Erkan (2020) An ordinary state-based peridynamic model for toughness enhancement of brittle materials through drilling stop-holes. International Journal of Mechanical Sciences, 182. pp. 1-15. 105773. ISSN 0020-7403 (https://doi.org/10.1016/j.ijmecsci.2020.105773)

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Abstract

In this paper, the ordinary state-based peridynamic (OSB) is used to simulate and study the effects of different-shaped stop-holes with different combinations on crack dynamics in brittle materials in order to establish a detailed knowledge about the toughening effect of internal features that can be in the form of holes and pores. Using the OSB analyses, a new easy-toapply technique is introduced to toughen the materials against crack propagations. As a first case study, the high accuracy of peridynamic approach in damage prediction is demonstrated through solving a collection of numerical and experimental benchmark problems. Moreover, the bi-hole, parabolic, branched, bi-parabolic, and mixed-parabolic combinations of stopholes under tensile loading, and the T-shape, I-shape, bi-linear, linear, and linear-parabolic combinations of stop-holes under shear loading are suggested for notably enhancing material toughness and are practically and functionally compared with each other. Generally, the suggested geometries are proven to be highly effective on toughness enhancement of materials with a relative ease of implementation, in comparison to other internal features such as microcracks. In addition, a further case study is carried out on the effects of the distance of stopholes from the initial crack-tip on crack dynamics and material toughness, in which it is observed that every hole has a specific µ-range, and thus, the crack dynamics are affected by the hole if and only if the crack enters this range. Overall, the arrestment and accelerating effects of the stop-holes on crack dynamics are carefully explained numerically and conceptually, which will help engineers and designers to maximize the positive effects of stopholes on material toughness and design a tougher micro-structural material using easily applied defects.

ORCID iDs

Rahimi, Mohammad Naqib, Kefal, Adnan, Yildiz, Mehmet and Oterkus, Erkan ORCID logoORCID: https://orcid.org/0000-0002-4614-7214;
  • Item type:Article
    ID code:72414
    Dates:
    Date
    Event
    15 September 2020
    Published
    23 May 2020
    Published Online
    13 May 2020
    Accepted
    4 February 2020
    Submitted
    Notes:2020 Elsevier Ltd. All rights reserved. Mohammad Naqib Rahimi, Adnan Kefal, Mehmet Yildiz, Erkan Oterkus, An ordinary state-based peridynamic model for toughness enhancement of brittle materials through drilling stop-holes, International Journal of Mechanical Sciences, Volume 182, 2020, 105773, https://doi.org/10.1016/j.ijmecsci.2020.105773
    Subjects:Technology > Mechanical engineering and machinery
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Depositing user: Pure Administrator
    Date deposited:19 May 2020 08:59
    Last modified:15 Nov 2024 22:29
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/72414
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