Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites

Gergely Czél, Putu Suwarta, Meisam Jalalvand, Michael R. Wisnom

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Glass/carbon hybrid specimens were designed and loaded in four point bending in order to generate stable compressive failure which allows for detailed microscopic study of the damage mechanisms. An optical measurement technique based on the displacements of five dots on the specimen edge was applied to monitor the strain of the carbon layer from the curvature of the sample. A loading frame suitable to be inserted into the vacuum chamber of a scanning electron microscope was developed. A previously tested specimen was deformed again in the loading frame and its polished edge surface was scanned while it was kept under significant deformation. This technique was successful in visualising the microscopic deformations and allowed for a deeper understanding of the damage mechanisms. Compressive fragmentation, sliding along the inclined fracture surfaces and local delaminations around the crack tips were confirmed by micrographs. An explanatory schematic was generated, highlighting the microscopic displacements of a fragment upon further loading.

LanguageEnglish
Number of pages8
Publication statusPublished - 25 Aug 2017
Event21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China
Duration: 20 Aug 201725 Aug 2017

Conference

Conference21st International Conference on Composite Materials, ICCM 2017
CountryChina
CityXi'an
Period20/08/1725/08/17

Fingerprint

Composite materials
Carbon
Schematic diagrams
Delamination
Crack tips
Electron microscopes
Vacuum
Scanning
Glass

Keywords

  • compression
  • fragmentation
  • hybrid composite
  • in-situ imaging
  • composite materials
  • damage mechanisms
  • optical measurement technique

Cite this

Czél, G., Suwarta, P., Jalalvand, M., & Wisnom, M. R. (2017). Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites. Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China.
Czél, Gergely ; Suwarta, Putu ; Jalalvand, Meisam ; Wisnom, Michael R. / Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites. Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China.8 p.
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Czél, G, Suwarta, P, Jalalvand, M & Wisnom, MR 2017, 'Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites' Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China, 20/08/17 - 25/08/17, .

Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites. / Czél, Gergely; Suwarta, Putu; Jalalvand, Meisam; Wisnom, Michael R.

2017. Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China.

Research output: Contribution to conferencePaper

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AU - Suwarta, Putu

AU - Jalalvand, Meisam

AU - Wisnom, Michael R.

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AB - Glass/carbon hybrid specimens were designed and loaded in four point bending in order to generate stable compressive failure which allows for detailed microscopic study of the damage mechanisms. An optical measurement technique based on the displacements of five dots on the specimen edge was applied to monitor the strain of the carbon layer from the curvature of the sample. A loading frame suitable to be inserted into the vacuum chamber of a scanning electron microscope was developed. A previously tested specimen was deformed again in the loading frame and its polished edge surface was scanned while it was kept under significant deformation. This technique was successful in visualising the microscopic deformations and allowed for a deeper understanding of the damage mechanisms. Compressive fragmentation, sliding along the inclined fracture surfaces and local delaminations around the crack tips were confirmed by micrographs. An explanatory schematic was generated, highlighting the microscopic displacements of a fragment upon further loading.

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KW - in-situ imaging

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Czél G, Suwarta P, Jalalvand M, Wisnom MR. Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites. 2017. Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China.