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Fracture behaviour of a rubber nano-modified structural epoxy adhesive: Bond gap effects and fracture damage zone.

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Title: Fracture behaviour of a rubber nano-modified structural epoxy adhesive: Bond gap effects and fracture damage zone.
Authors: Quan, Dong1, Murphy, Neal1, Ivankovic, Alojz1
Source: International Journal of Adhesion & Adhesives. Sep2017, Vol. 77, p138-150. 13p.
Subjects: Adhesives, Energy dissipation, Epoxy resins, Strains & stresses (Mechanics), Deformations (Mechanics)
Abstract: This paper critically examined the fracture behaviour of a rubber-modified, structural epoxy adhesive with various bond gap thicknesses ranging from 0.05 mm to 6 mm. The main and very novel contribution is direct measurement of the fracture process zone, plastic deformation zone and intrinsic fracture energy dissipated in the fracture process zone. The shape and size of the fracture process zone and plastic deformation zone were identified using scanning electron microscopy, transmission electron microscope and transmission optical microscope. As the bond gap thickness increased, the fracture energy increased steadily from 2365 J/m 2 for 0.05 mm bond gap thickness to 6289 J/m 2 of 1.6 mm bond gap thickness, and then plateaued. The thickness and failure strain of the fracture process zone remained essentially constant, being approximately 0.052 mm and 0.55 respectively, for different bond gap thicknesses. The intrinsic fracture energy (dissipated in the fracture process zone) appeared to be a material property, which remained approximately 2738 J/m 2 . The plastic deformation zone extended through the entire bond gap in thickness and occupied a significant length for all bond gap thicknesses. The effect of bond gap thickness on the fracture energy of the adhesive joints is hence directly attributed to the variation of the plastic deformation energy (dissipated in the plastic deformation zone) with bond gap thickness. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Adhesion & Adhesives 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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DbLabel: Engineering Source
An: 123940316
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  Data: Fracture behaviour of a rubber nano-modified structural epoxy adhesive: Bond gap effects and fracture damage zone.
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  Data: <searchLink fieldCode="AR" term="%22Quan%2C+Dong%22">Quan, Dong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Murphy%2C+Neal%22">Murphy, Neal</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ivankovic%2C+Alojz%22">Ivankovic, Alojz</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Adhesion+%26+Adhesives%22">International Journal of Adhesion & Adhesives</searchLink>. Sep2017, Vol. 77, p138-150. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Adhesives%22">Adhesives</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Epoxy+resins%22">Epoxy resins</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper critically examined the fracture behaviour of a rubber-modified, structural epoxy adhesive with various bond gap thicknesses ranging from 0.05 mm to 6 mm. The main and very novel contribution is direct measurement of the fracture process zone, plastic deformation zone and intrinsic fracture energy dissipated in the fracture process zone. The shape and size of the fracture process zone and plastic deformation zone were identified using scanning electron microscopy, transmission electron microscope and transmission optical microscope. As the bond gap thickness increased, the fracture energy increased steadily from 2365 J/m 2 for 0.05 mm bond gap thickness to 6289 J/m 2 of 1.6 mm bond gap thickness, and then plateaued. The thickness and failure strain of the fracture process zone remained essentially constant, being approximately 0.052 mm and 0.55 respectively, for different bond gap thicknesses. The intrinsic fracture energy (dissipated in the fracture process zone) appeared to be a material property, which remained approximately 2738 J/m 2 . The plastic deformation zone extended through the entire bond gap in thickness and occupied a significant length for all bond gap thicknesses. The effect of bond gap thickness on the fracture energy of the adhesive joints is hence directly attributed to the variation of the plastic deformation energy (dissipated in the plastic deformation zone) with bond gap thickness. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Adhesion & Adhesives 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.ijadhadh.2017.05.001
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 138
    Subjects:
      – SubjectFull: Adhesives
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
      – SubjectFull: Epoxy resins
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
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      – TitleFull: Fracture behaviour of a rubber nano-modified structural epoxy adhesive: Bond gap effects and fracture damage zone.
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            NameFull: Quan, Dong
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            NameFull: Murphy, Neal
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            NameFull: Ivankovic, Alojz
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            – D: 01
              M: 09
              Text: Sep2017
              Type: published
              Y: 2017
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              Value: 77
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            – TitleFull: International Journal of Adhesion & Adhesives
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