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Micro-CT investigation on fatigue damage evolution in short fibre reinforced polymers

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Title: Micro-CT investigation on fatigue damage evolution in short fibre reinforced polymers
Authors: Cosmi, F.1 cosmi@units.it, Bernasconi, A.2 andrea.bernasconi@polimi.it
Source: Composites Science & Technology. Apr2013, Vol. 79, p70-76. 7p.
Subjects: Reinforced plastics, Fatigue cracks, Computed tomography, Material fatigue, X-ray computed microtomography, Ultrasonic imaging, Polyamides
Abstract: Abstract: The development of predictive models for fatigue behavior of materials is closely related to a quantitative assessment of damage nucleation and propagation phenomena. Conventional methods used for this purpose, such as microscope observations, conventional radiographs, ultrasonography techniques, either are destructive or do not reach an adequate resolution. Imaging techniques using synchrotron radiation, and in particular X-ray micro-computed tomography (micro-CT), however, combine the advantages of a non-destructive technique with a high spatial resolution. In this paper, damage evolution in samples extracted from PA6.6GF35 specimens subjected to fatigue tests interrupted at different stages of fatigue life is investigated by means of synchrotron radiation micro-CT. Although preliminary, our results suggest that the application of this technique for micro-voids detection within the glass short fibre polyamide reinforced samples offers unique possibilities of investigating the micro-scale internal structure of the samples but, at the same time, presents several criticalities at different stages of the analyses, ranging from specimen size to set-up configuration and threshold selection. A frank discussion of the critical issues encountered during the analyses supplements the presentation in an effort to help defining general guidelines for future developments in this field. [Copyright &y& Elsevier]
Copyright of Composites Science & Technology 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: 86922578
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Micro-CT investigation on fatigue damage evolution in short fibre reinforced polymers
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  Data: <searchLink fieldCode="AR" term="%22Cosmi%2C+F%2E%22">Cosmi, F.</searchLink><relatesTo>1</relatesTo><i> cosmi@units.it</i><br /><searchLink fieldCode="AR" term="%22Bernasconi%2C+A%2E%22">Bernasconi, A.</searchLink><relatesTo>2</relatesTo><i> andrea.bernasconi@polimi.it</i>
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  Data: <searchLink fieldCode="JN" term="%22Composites+Science+%26+Technology%22">Composites Science & Technology</searchLink>. Apr2013, Vol. 79, p70-76. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Reinforced+plastics%22">Reinforced plastics</searchLink><br /><searchLink fieldCode="DE" term="%22Fatigue+cracks%22">Fatigue cracks</searchLink><br /><searchLink fieldCode="DE" term="%22Computed+tomography%22">Computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Material+fatigue%22">Material fatigue</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+computed+microtomography%22">X-ray computed microtomography</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+imaging%22">Ultrasonic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Polyamides%22">Polyamides</searchLink>
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  Label: Abstract
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  Data: Abstract: The development of predictive models for fatigue behavior of materials is closely related to a quantitative assessment of damage nucleation and propagation phenomena. Conventional methods used for this purpose, such as microscope observations, conventional radiographs, ultrasonography techniques, either are destructive or do not reach an adequate resolution. Imaging techniques using synchrotron radiation, and in particular X-ray micro-computed tomography (micro-CT), however, combine the advantages of a non-destructive technique with a high spatial resolution. In this paper, damage evolution in samples extracted from PA6.6GF35 specimens subjected to fatigue tests interrupted at different stages of fatigue life is investigated by means of synchrotron radiation micro-CT. Although preliminary, our results suggest that the application of this technique for micro-voids detection within the glass short fibre polyamide reinforced samples offers unique possibilities of investigating the micro-scale internal structure of the samples but, at the same time, presents several criticalities at different stages of the analyses, ranging from specimen size to set-up configuration and threshold selection. A frank discussion of the critical issues encountered during the analyses supplements the presentation in an effort to help defining general guidelines for future developments in this field. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Composites Science & Technology 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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      – Type: doi
        Value: 10.1016/j.compscitech.2013.02.008
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 70
    Subjects:
      – SubjectFull: Reinforced plastics
        Type: general
      – SubjectFull: Fatigue cracks
        Type: general
      – SubjectFull: Computed tomography
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      – SubjectFull: Material fatigue
        Type: general
      – SubjectFull: X-ray computed microtomography
        Type: general
      – SubjectFull: Ultrasonic imaging
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      – SubjectFull: Polyamides
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      – TitleFull: Micro-CT investigation on fatigue damage evolution in short fibre reinforced polymers
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              Text: Apr2013
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              Y: 2013
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