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Split Hopkinson pressure bar testing of 3D multi-axial warp knitted carbon/epoxy composites.

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Title: Split Hopkinson pressure bar testing of 3D multi-axial warp knitted carbon/epoxy composites.
Authors: Li, Dian-sen1,2 lidiansen@buaa.edu.cn, Chen, Hao-ran2, Ge, Dong-yun3 Gedy@tsinghua.edu.cn, Jiang, Nan4, Jiang, Lei1
Source: Composites: Part B, Engineering. Sep2015, Vol. 79, p692-705. 14p.
Subjects: Epoxy resins, Composite materials, Temperature sensors, Strain rate, High temperatures
Abstract: High-strain-rate compression experiments were performed on 3D MWK carbon/epoxy composites with different fiber architectures at room and elevated temperature using an SHPB apparatus. Macro-fracture and SEM micrographs were examined to understand the failure mechanism. The results show the dynamic properties increase with the strain rate and show a high-strain-rate sensitivity. Meanwhile, composites with [0°/0°/0°/0°] have higher properties. Moreover, composites show temperature sensitivity and the properties decrease significantly, especially for composites with [0°/90°/+45°/−45°]. The results also indicate composites take on more serious damage and failure with the strain rate. The failure of composites with [0°/0°/0°/0°] behaves in multiple delaminating, overall expansion and 0° fibers tearing. While that of composites with [0°/90°/+45°/−45°] is mainly interlaminar delaminating, local fibers tearing and fracture on different fiber layers. In addition, with increasing the temperature, the composite shows less fracture and becomes more plastic. The damage of matrix yielding, interface debonding and twisting of fibers increase significantly. [ABSTRACT FROM AUTHOR]
Copyright of Composites: Part B, Engineering 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: 103690308
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Split Hopkinson pressure bar testing of 3D multi-axial warp knitted carbon/epoxy composites.
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  Data: <searchLink fieldCode="JN" term="%22Composites%3A+Part+B%2C+Engineering%22">Composites: Part B, Engineering</searchLink>. Sep2015, Vol. 79, p692-705. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Epoxy+resins%22">Epoxy resins</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+sensors%22">Temperature sensors</searchLink><br /><searchLink fieldCode="DE" term="%22Strain+rate%22">Strain rate</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-strain-rate compression experiments were performed on 3D MWK carbon/epoxy composites with different fiber architectures at room and elevated temperature using an SHPB apparatus. Macro-fracture and SEM micrographs were examined to understand the failure mechanism. The results show the dynamic properties increase with the strain rate and show a high-strain-rate sensitivity. Meanwhile, composites with [0°/0°/0°/0°] have higher properties. Moreover, composites show temperature sensitivity and the properties decrease significantly, especially for composites with [0°/90°/+45°/−45°]. The results also indicate composites take on more serious damage and failure with the strain rate. The failure of composites with [0°/0°/0°/0°] behaves in multiple delaminating, overall expansion and 0° fibers tearing. While that of composites with [0°/90°/+45°/−45°] is mainly interlaminar delaminating, local fibers tearing and fracture on different fiber layers. In addition, with increasing the temperature, the composite shows less fracture and becomes more plastic. The damage of matrix yielding, interface debonding and twisting of fibers increase significantly. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Composites: Part B, Engineering 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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        Value: 10.1016/j.compositesb.2015.04.045
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      – Code: eng
        Text: English
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        PageCount: 14
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      – SubjectFull: Epoxy resins
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Temperature sensors
        Type: general
      – SubjectFull: Strain rate
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      – SubjectFull: High temperatures
        Type: general
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      – TitleFull: Split Hopkinson pressure bar testing of 3D multi-axial warp knitted carbon/epoxy composites.
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            NameFull: Li, Dian-sen
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            NameFull: Chen, Hao-ran
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            NameFull: Ge, Dong-yun
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            NameFull: Jiang, Nan
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            NameFull: Jiang, Lei
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              Text: Sep2015
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