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Limit curves for brittle fracture in key-hole notches under mixed mode I/III loading based on stress-based criteria.

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Title: Limit curves for brittle fracture in key-hole notches under mixed mode I/III loading based on stress-based criteria.
Authors: Hatami, F.1 (AUTHOR), Ayatollahi, M.R.1 (AUTHOR) m.ayat@iust.ac.ir, Torabi, A.R.2 (AUTHOR)
Source: European Journal of Mechanics A: Solids. Jan2021, Vol. 85, pN.PAG-N.PAG. 1p.
Subjects: Brittle fractures, Notch effect, Curves, Fracture toughness, Brittle materials
Abstract: In this research, with the aim to estimate the onset of fracture in key-hole notched components, made of brittle materials and subjected to combined tension-tear loading, the fracture limit curves are developed in terms of the notch stress intensity factors (NSIFs) based on the maximum tangential stress (MTS) and mean stress (MS) criteria. In order to verify the curves developed, a series of fracture tests are carried out on key-hole notched specimens made of PMMA using an improved loading configuration. The samples are prepared with three various notch tip radii for the sake of evaluating the influence of the notch tip radius on the fracture toughness of the key-hole notched samples. It is shown that for all notch tip radii, the fracture limit curves for both MTS and MS criteria are in very good consistency with the experimental data. No meaningful difference is found between the curves of MTS and MS criteria, especially under plane-stress conditions. It is also observed that the notch fracture toughness of the PMMA specimens could be well estimated under both plane-stress and plan-strain conditions. • Fracture curves were developed for mixed mode I/III loading in keyhole notches. • The maximum tangential stress and the mean stress criteria were employed for fracture analysis. • Fracture tests were performed on key-hole notched specimens made of PMMA for three notch radii. • Fracture curves of both criteria were in very good consistency with experimental data. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Mechanics A: Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 146810419
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Limit curves for brittle fracture in key-hole notches under mixed mode I/III loading based on stress-based criteria.
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  Data: <searchLink fieldCode="AR" term="%22Hatami%2C+F%2E%22">Hatami, F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ayatollahi%2C+M%2ER%2E%22">Ayatollahi, M.R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.ayat@iust.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Torabi%2C+A%2ER%2E%22">Torabi, A.R.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Journal+of+Mechanics+A%3A+Solids%22">European Journal of Mechanics A: Solids</searchLink>. Jan2021, Vol. 85, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Brittle+fractures%22">Brittle fractures</searchLink><br /><searchLink fieldCode="DE" term="%22Notch+effect%22">Notch effect</searchLink><br /><searchLink fieldCode="DE" term="%22Curves%22">Curves</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Brittle+materials%22">Brittle materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this research, with the aim to estimate the onset of fracture in key-hole notched components, made of brittle materials and subjected to combined tension-tear loading, the fracture limit curves are developed in terms of the notch stress intensity factors (NSIFs) based on the maximum tangential stress (MTS) and mean stress (MS) criteria. In order to verify the curves developed, a series of fracture tests are carried out on key-hole notched specimens made of PMMA using an improved loading configuration. The samples are prepared with three various notch tip radii for the sake of evaluating the influence of the notch tip radius on the fracture toughness of the key-hole notched samples. It is shown that for all notch tip radii, the fracture limit curves for both MTS and MS criteria are in very good consistency with the experimental data. No meaningful difference is found between the curves of MTS and MS criteria, especially under plane-stress conditions. It is also observed that the notch fracture toughness of the PMMA specimens could be well estimated under both plane-stress and plan-strain conditions. • Fracture curves were developed for mixed mode I/III loading in keyhole notches. • The maximum tangential stress and the mean stress criteria were employed for fracture analysis. • Fracture tests were performed on key-hole notched specimens made of PMMA for three notch radii. • Fracture curves of both criteria were in very good consistency with experimental data. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Journal of Mechanics A: Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.euromechsol.2020.104089
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Brittle fractures
        Type: general
      – SubjectFull: Notch effect
        Type: general
      – SubjectFull: Curves
        Type: general
      – SubjectFull: Fracture toughness
        Type: general
      – SubjectFull: Brittle materials
        Type: general
    Titles:
      – TitleFull: Limit curves for brittle fracture in key-hole notches under mixed mode I/III loading based on stress-based criteria.
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            NameFull: Hatami, F.
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            NameFull: Ayatollahi, M.R.
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            NameFull: Torabi, A.R.
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            – D: 01
              M: 01
              Text: Jan2021
              Type: published
              Y: 2021
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              Value: 85
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            – TitleFull: European Journal of Mechanics A: Solids
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