EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING

Mudan Chen; Bing Zhang; Xiaodong Xu; Giuliano Allegri; Stephen R. Hallett

doi:10.5075/epfl-298799_978-2-9701614-0-0

EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING

Mudan Chen^*, Bing Zhang, Xiaodong Xu, Giuliano Allegri, Stephen R. Hallett

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Abstract

This study investigates the influence of the most commonly used Z-pin type, i.e., carbon-fibre composite Z-pin on the four-point bending strength of curved laminates through experiments. The layup has been carefully designed through performing finite element analysis (FEA) to reduce the probability of edge delamination. Three types of samples have been manufactured: unpinned, and Z-pinned with 0.27% and 0.54% areal densities. HexPly® IM7/8552 carbon/epoxy unidirectional prepreg and 0.28 mm diameter T300/BMI pins were employed to manufacture the specimens. It was found that the through-thickness tensile strength decreased by 26% and 37% for 0.27% and 0.54% Z-pinned samples respectively. The surface bonding-frictional force between the pin and laminate interface is not enough to resist the damage initiation, and the pins cause additional disturbance to the laminate, leading to the strength reduction.

Original language	English
Title of host publication	Proceedings of the 20th European Conference on Composite Materials
Subtitle of host publication	Characterization
Editors	Anastasios P. Vassilopoulos, Veronique Michaud
Publisher	Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL)
Pages	63-68
Number of pages	6
ISBN (Electronic)	9782970161400
DOIs	https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0
Publication status	Published - 30 Jun 2022
Event	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 - Lausanne, Switzerland Duration: 26 Jun 2022 → 30 Jun 2022

Publication series

Name	Proceedings of the European Conference on Composite Materials

Conference

Conference	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022
Country/Territory	Switzerland
City	Lausanne
Period	26/06/22 → 30/06/22

Bibliographical note

Publisher Copyright:
© 2022 Chen et al.

Keywords

curved laminates
delamination
four-point bending
Z-pin

Access to Document

10.5075/epfl-298799_978-2-9701614-0-0Licence: CC BY-NC

Handle.net

Persistent link

Cite this

Chen, M., Zhang, B., Xu, X., Allegri, G., & Hallett, S. R. (2022). EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING. In A. P. Vassilopoulos, & V. Michaud (Eds.), Proceedings of the 20th European Conference on Composite Materials: Characterization (pp. 63-68). (Proceedings of the European Conference on Composite Materials). Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL). https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

Chen, Mudan ; Zhang, Bing ; Xu, Xiaodong et al. / EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING. Proceedings of the 20th European Conference on Composite Materials: Characterization. editor / Anastasios P. Vassilopoulos ; Veronique Michaud. Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), 2022. pp. 63-68 (Proceedings of the European Conference on Composite Materials).

@inproceedings{3d9cb6c8aff341abb84a4f06d77c496b,

title = "EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING",

abstract = "This study investigates the influence of the most commonly used Z-pin type, i.e., carbon-fibre composite Z-pin on the four-point bending strength of curved laminates through experiments. The layup has been carefully designed through performing finite element analysis (FEA) to reduce the probability of edge delamination. Three types of samples have been manufactured: unpinned, and Z-pinned with 0.27\% and 0.54\% areal densities. HexPly{\textregistered} IM7/8552 carbon/epoxy unidirectional prepreg and 0.28 mm diameter T300/BMI pins were employed to manufacture the specimens. It was found that the through-thickness tensile strength decreased by 26\% and 37\% for 0.27\% and 0.54\% Z-pinned samples respectively. The surface bonding-frictional force between the pin and laminate interface is not enough to resist the damage initiation, and the pins cause additional disturbance to the laminate, leading to the strength reduction.",

keywords = "curved laminates, delamination, four-point bending, Z-pin",

author = "Mudan Chen and Bing Zhang and Xiaodong Xu and Giuliano Allegri and Hallett, \{Stephen R.\}",

note = "Publisher Copyright: {\textcopyright} 2022 Chen et al.; 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 ; Conference date: 26-06-2022 Through 30-06-2022",

year = "2022",

month = jun,

day = "30",

doi = "10.5075/epfl-298799\_978-2-9701614-0-0",

language = "English",

series = "Proceedings of the European Conference on Composite Materials",

publisher = "Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL)",

pages = "63--68",

editor = "Vassilopoulos, \{Anastasios P.\} and Veronique Michaud",

booktitle = "Proceedings of the 20th European Conference on Composite Materials",

}

Chen, M, Zhang, B, Xu, X , Allegri, G & Hallett, SR 2022, EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING. in AP Vassilopoulos & V Michaud (eds), Proceedings of the 20th European Conference on Composite Materials: Characterization. Proceedings of the European Conference on Composite Materials, Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), pp. 63-68, 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022, Lausanne, Switzerland, 26/06/22. https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING. / Chen, Mudan; Zhang, Bing; Xu, Xiaodong et al.
Proceedings of the 20th European Conference on Composite Materials: Characterization. ed. / Anastasios P. Vassilopoulos; Veronique Michaud. Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), 2022. p. 63-68 (Proceedings of the European Conference on Composite Materials).

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING

AU - Chen, Mudan

AU - Zhang, Bing

AU - Xu, Xiaodong

AU - Allegri, Giuliano

AU - Hallett, Stephen R.

PY - 2022/6/30

Y1 - 2022/6/30

N2 - This study investigates the influence of the most commonly used Z-pin type, i.e., carbon-fibre composite Z-pin on the four-point bending strength of curved laminates through experiments. The layup has been carefully designed through performing finite element analysis (FEA) to reduce the probability of edge delamination. Three types of samples have been manufactured: unpinned, and Z-pinned with 0.27% and 0.54% areal densities. HexPly® IM7/8552 carbon/epoxy unidirectional prepreg and 0.28 mm diameter T300/BMI pins were employed to manufacture the specimens. It was found that the through-thickness tensile strength decreased by 26% and 37% for 0.27% and 0.54% Z-pinned samples respectively. The surface bonding-frictional force between the pin and laminate interface is not enough to resist the damage initiation, and the pins cause additional disturbance to the laminate, leading to the strength reduction.

AB - This study investigates the influence of the most commonly used Z-pin type, i.e., carbon-fibre composite Z-pin on the four-point bending strength of curved laminates through experiments. The layup has been carefully designed through performing finite element analysis (FEA) to reduce the probability of edge delamination. Three types of samples have been manufactured: unpinned, and Z-pinned with 0.27% and 0.54% areal densities. HexPly® IM7/8552 carbon/epoxy unidirectional prepreg and 0.28 mm diameter T300/BMI pins were employed to manufacture the specimens. It was found that the through-thickness tensile strength decreased by 26% and 37% for 0.27% and 0.54% Z-pinned samples respectively. The surface bonding-frictional force between the pin and laminate interface is not enough to resist the damage initiation, and the pins cause additional disturbance to the laminate, leading to the strength reduction.

KW - curved laminates

KW - delamination

KW - four-point bending

KW - Z-pin

U2 - 10.5075/epfl-298799_978-2-9701614-0-0

DO - 10.5075/epfl-298799_978-2-9701614-0-0

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:85149187344

T3 - Proceedings of the European Conference on Composite Materials

SP - 63

EP - 68

BT - Proceedings of the 20th European Conference on Composite Materials

A2 - Vassilopoulos, Anastasios P.

A2 - Michaud, Veronique

PB - Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL)

T2 - 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022

Y2 - 26 June 2022 through 30 June 2022

ER -

Chen M, Zhang B, Xu X , Allegri G , Hallett SR. EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING. In Vassilopoulos AP, Michaud V, editors, Proceedings of the 20th European Conference on Composite Materials: Characterization. Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL). 2022. p. 63-68. (Proceedings of the European Conference on Composite Materials). doi: 10.5075/epfl-298799_978-2-9701614-0-0

EXPERIMENTAL STUDY ON THE MECHANICAL BEHAVIOUR OF CARBON-FIBRE Z-PIN REINFORCED CURVED COMPOSITE LAMINATES UNDER FOUR-POINT BENDING

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

Handle.net

Fingerprint

Cite this