Assembly of thermoplastic composites in the single strap joint configuration under bending.

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Title: Assembly of thermoplastic composites in the single strap joint configuration under bending.
Authors: Kadioglu, Ferhat1 (AUTHOR) fkadioglu@aybu.edu.tr
Source: Journal of Composite Materials. Jun2026, Vol. 60 Issue 15, p1421-1432. 12p.
Subjects: Thermoplastic composites, Adhesive joints, Bending strength, Structural failures, Numerical analysis
Abstract: Thermoplastic composites are expected to play an important part in the aerospace material repairs, and one of the best examples is through use of the Single Strap Joint (SSJ), albeit the works related to the thermoplastic joints are not available. This study focuses on the co-cured SSJ with thermoplastic adherends under bending. The performance of the joints was investigated by flipping positions of the strap (strap-up and strap-down), with a particular focus on the capacity of the load as well as the applied displacements. The joint having a strap of 30 mm length was also numerically analyzed via an ABAQUS program. The results showed the joints with the strap-up were stronger than those with the strap-down because the strap remined mainly in normal compression stresses where the critical points existed, while for those with the strap-down, the strap suffered from peeling stresses in the same region. It was found that the strap-up joints are about 8% stronger and have about 26% higher displacements to failure, compared to the strap-down ones. Interlaminar delamination of the adherends or strap was observed as major failure mechanisms. Nevertheless, the failure zones for both cases were in tensile and/or shear out-of-plane stresses. The difference between experimental and numerical results of loads and applied displacements are about 9% and 2% for the strap-down joints, and about 8% and 4% for the strap-up joints, respectively. Simulations show the joint design could be improved for better performance. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Composite Materials is the property of Sage Publications, Ltd. 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.)
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An: 192953894
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  Data: Assembly of thermoplastic composites in the single strap joint configuration under bending.
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  Data: <searchLink fieldCode="AR" term="%22Kadioglu%2C+Ferhat%22">Kadioglu, Ferhat</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fkadioglu@aybu.edu.tr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Composite+Materials%22">Journal of Composite Materials</searchLink>. Jun2026, Vol. 60 Issue 15, p1421-1432. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Thermoplastic+composites%22">Thermoplastic composites</searchLink><br /><searchLink fieldCode="DE" term="%22Adhesive+joints%22">Adhesive joints</searchLink><br /><searchLink fieldCode="DE" term="%22Bending+strength%22">Bending strength</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+failures%22">Structural failures</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Thermoplastic composites are expected to play an important part in the aerospace material repairs, and one of the best examples is through use of the Single Strap Joint (SSJ), albeit the works related to the thermoplastic joints are not available. This study focuses on the co-cured SSJ with thermoplastic adherends under bending. The performance of the joints was investigated by flipping positions of the strap (strap-up and strap-down), with a particular focus on the capacity of the load as well as the applied displacements. The joint having a strap of 30 mm length was also numerically analyzed via an ABAQUS program. The results showed the joints with the strap-up were stronger than those with the strap-down because the strap remined mainly in normal compression stresses where the critical points existed, while for those with the strap-down, the strap suffered from peeling stresses in the same region. It was found that the strap-up joints are about 8% stronger and have about 26% higher displacements to failure, compared to the strap-down ones. Interlaminar delamination of the adherends or strap was observed as major failure mechanisms. Nevertheless, the failure zones for both cases were in tensile and/or shear out-of-plane stresses. The difference between experimental and numerical results of loads and applied displacements are about 9% and 2% for the strap-down joints, and about 8% and 4% for the strap-up joints, respectively. Simulations show the joint design could be improved for better performance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Composite Materials is the property of Sage Publications, Ltd. 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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      – Type: doi
        Value: 10.1177/00219983251386087
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 1421
    Subjects:
      – SubjectFull: Thermoplastic composites
        Type: general
      – SubjectFull: Adhesive joints
        Type: general
      – SubjectFull: Bending strength
        Type: general
      – SubjectFull: Structural failures
        Type: general
      – SubjectFull: Numerical analysis
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      – TitleFull: Assembly of thermoplastic composites in the single strap joint configuration under bending.
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              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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