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

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

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

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

Mechanical And Aerospace Engineering

Research output: Contribution to conference › Paper › peer-review

5 Citations (Scopus)

37 Downloads (Pure)

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.

Original language	English
Number of pages	8
Publication status	Published - 25 Aug 2017
Event	21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China Duration: 20 Aug 2017 → 25 Aug 2017

Conference

Conference	21st International Conference on Composite Materials, ICCM 2017
Country/Territory	China
City	Xi'an
Period	20/08/17 → 25/08/17

Funding

This work was funded under the UK Engineering and Physical Sciences Research Council Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College London. Gergely Czél acknowledges the Hungarian Academy of Sciences for funding through the János Bolyai scholarship and the Hungarian National Research, Development and Innovation Office - NKFIH for funding through grants ref. OTKA K 116070 and OTKA PD 121121. The authors acknowledge Hexcel and North TPT for supplying materials for this research. All data required for reproducibility are provided within the paper.

Keywords

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

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Czél-etal-ICCM2017-Investigation-compression-performance-failure-mechanism-pseudo-ductile-thin-ply-hybrid-compositesAccepted author manuscript, 576 KB

Cite this

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title = "Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites",

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.",

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T1 - Investigation of the compression performance and failure mechanism of pseudo-ductile thin-ply hybrid composites

AU - Czél, Gergely

AU - Suwarta, Putu

AU - Jalalvand, Meisam

AU - Wisnom, Michael R.

PY - 2017/8/25

Y1 - 2017/8/25

N2 - 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.

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.

KW - compression

KW - fragmentation

KW - hybrid composite

KW - in-situ imaging

KW - composite materials

KW - damage mechanisms

KW - optical measurement technique

UR - https://www.scopus.com/pages/publications/85053168350

M3 - Paper

AN - SCOPUS:85053168350

T2 - 21st International Conference on Composite Materials, ICCM 2017

Y2 - 20 August 2017 through 25 August 2017

ER -

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

Abstract

Conference

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Keywords

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