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Investigation of the temperature dependent impact behaviour of pin reinforced foam core sandwich structures.

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Title: Investigation of the temperature dependent impact behaviour of pin reinforced foam core sandwich structures.
Authors: Dimassi, M. Adli1 dimassi@faserinstitut.de, John, Marianne1, Herrmann, Axel S.1
Source: Composite Structures. Oct2018, Vol. 202, p774-782. 9p.
Subjects: Sandwich construction (Materials), Foam, Structural analysis (Engineering), Temperature effect, Imides, Glass fibers, Carbon fibers
Abstract: Abstract Dry carbon and glass fibre bundles were inserted into a ROHACELL® 71HERO Polymethacrylimide (PMI) foam core under a specific inclination angle and pin pattern in order to improve the impact damage tolerance and the fracture toughness of foam core sandwich. Impact tests were performed on pin-reinforced foam core sandwich panels with different pin-configurations at impact energies between 35 J and 70 J. X-ray computed tomography and ultrasonic C-scan were used to determine the damages in the foam core. At room temperature no cracks were observed in the foam core. Using carbon fibre pins led to the creation of thermally induced cracks in the foam core after impacts at −55 °C, which is critical for the integrity of the structure. The modification of the manufacturing process parameters and the use of glass fibre pins are two solutions to improve the impact behaviour at −55 °C by delaying the thermal cracks to higher impact energies. [ABSTRACT FROM AUTHOR]
Copyright of Composite Structures 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: 131526564
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Investigation of the temperature dependent impact behaviour of pin reinforced foam core sandwich structures.
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  Data: <searchLink fieldCode="AR" term="%22Dimassi%2C+M%2E+Adli%22">Dimassi, M. Adli</searchLink><relatesTo>1</relatesTo><i> dimassi@faserinstitut.de</i><br /><searchLink fieldCode="AR" term="%22John%2C+Marianne%22">John, Marianne</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Herrmann%2C+Axel+S%2E%22">Herrmann, Axel S.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Composite+Structures%22">Composite Structures</searchLink>. Oct2018, Vol. 202, p774-782. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Sandwich+construction+%28Materials%29%22">Sandwich construction (Materials)</searchLink><br /><searchLink fieldCode="DE" term="%22Foam%22">Foam</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Imides%22">Imides</searchLink><br /><searchLink fieldCode="DE" term="%22Glass+fibers%22">Glass fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+fibers%22">Carbon fibers</searchLink>
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  Label: Abstract
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  Data: Abstract Dry carbon and glass fibre bundles were inserted into a ROHACELL® 71HERO Polymethacrylimide (PMI) foam core under a specific inclination angle and pin pattern in order to improve the impact damage tolerance and the fracture toughness of foam core sandwich. Impact tests were performed on pin-reinforced foam core sandwich panels with different pin-configurations at impact energies between 35 J and 70 J. X-ray computed tomography and ultrasonic C-scan were used to determine the damages in the foam core. At room temperature no cracks were observed in the foam core. Using carbon fibre pins led to the creation of thermally induced cracks in the foam core after impacts at −55 °C, which is critical for the integrity of the structure. The modification of the manufacturing process parameters and the use of glass fibre pins are two solutions to improve the impact behaviour at −55 °C by delaying the thermal cracks to higher impact energies. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Composite Structures 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.compstruct.2018.04.012
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 774
    Subjects:
      – SubjectFull: Sandwich construction (Materials)
        Type: general
      – SubjectFull: Foam
        Type: general
      – SubjectFull: Structural analysis (Engineering)
        Type: general
      – SubjectFull: Temperature effect
        Type: general
      – SubjectFull: Imides
        Type: general
      – SubjectFull: Glass fibers
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      – SubjectFull: Carbon fibers
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      – TitleFull: Investigation of the temperature dependent impact behaviour of pin reinforced foam core sandwich structures.
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            – D: 15
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              Text: Oct2018
              Type: published
              Y: 2018
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