Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

Hao Cui; Mehdi Yasaee; Stephen R. Hallett; Ivana K. Partridge; Giuliano Allegri; Nik Petrinic

doi:10.1016/j.compositesa.2017.11.017

Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

Hao Cui^*, Mehdi Yasaee, Stephen R. Hallett, Ivana K. Partridge, Giuliano Allegri, Nik Petrinic

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

Delamination resistance of composite laminates can be improved with through-thickness reinforcement such as Z-pinning. This paper characterises the bridging response of individual carbon fibre/BMI Z-pins in mixed mode delamination at high loading rate using a split Hopkinson bar system. The unstable failure process in quasi-static tests, was also captured with high sampling rate instruments to obtain the complete bridging response. The energy dissipation of the Z-pins were analysed, and it was found that the efficacy of Z-pinning in resisting delamination growth decreased with an increase in mixed mode ratio, with a transition from pull-out to pin rupture occurring. The Z-pin efficacy decreased with loading rate for all mode mix ratios, due to the changing in failure surface with loading rate and rate-dependent frictional sliding.

Original language	English
Pages (from-to)	24-33
Number of pages	10
Journal	Composites Part A: Applied Science and Manufacturing
Volume	106
Early online date	23 Nov 2017
DOIs	https://doi.org/10.1016/j.compositesa.2017.11.017
Publication status	Published - 1 Mar 2018

Keywords

A. Fracture toughness
B. Failure
C. Delamination
D. 3-Dimensional reinforcement

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10.1016/j.compositesa.2017.11.017

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ELSEVIER at https://www.sciencedirect.com/science/article/pii/S1359835X17304232#ak005 . Please refer to any applicable terms of use of the publisher.
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@article{9984a54f8b54421aa017893f50d838e3,

title = "Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination",

abstract = "Delamination resistance of composite laminates can be improved with through-thickness reinforcement such as Z-pinning. This paper characterises the bridging response of individual carbon fibre/BMI Z-pins in mixed mode delamination at high loading rate using a split Hopkinson bar system. The unstable failure process in quasi-static tests, was also captured with high sampling rate instruments to obtain the complete bridging response. The energy dissipation of the Z-pins were analysed, and it was found that the efficacy of Z-pinning in resisting delamination growth decreased with an increase in mixed mode ratio, with a transition from pull-out to pin rupture occurring. The Z-pin efficacy decreased with loading rate for all mode mix ratios, due to the changing in failure surface with loading rate and rate-dependent frictional sliding.",

keywords = "A. Fracture toughness, B. Failure, C. Delamination, D. 3-Dimensional reinforcement",

author = "Hao Cui and Mehdi Yasaee and Hallett, {Stephen R.} and Partridge, {Ivana K.} and Giuliano Allegri and Nik Petrinic",

year = "2018",

month = mar,

day = "1",

doi = "10.1016/j.compositesa.2017.11.017",

language = "English",

volume = "106",

pages = "24--33",

journal = "Composites Part A: Applied Science and Manufacturing",

issn = "1359-835X",

publisher = "Elsevier Science",

}

TY - JOUR

T1 - Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

AU - Cui, Hao

AU - Yasaee, Mehdi

AU - Hallett, Stephen R.

AU - Partridge, Ivana K.

AU - Allegri, Giuliano

AU - Petrinic, Nik

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Delamination resistance of composite laminates can be improved with through-thickness reinforcement such as Z-pinning. This paper characterises the bridging response of individual carbon fibre/BMI Z-pins in mixed mode delamination at high loading rate using a split Hopkinson bar system. The unstable failure process in quasi-static tests, was also captured with high sampling rate instruments to obtain the complete bridging response. The energy dissipation of the Z-pins were analysed, and it was found that the efficacy of Z-pinning in resisting delamination growth decreased with an increase in mixed mode ratio, with a transition from pull-out to pin rupture occurring. The Z-pin efficacy decreased with loading rate for all mode mix ratios, due to the changing in failure surface with loading rate and rate-dependent frictional sliding.

AB - Delamination resistance of composite laminates can be improved with through-thickness reinforcement such as Z-pinning. This paper characterises the bridging response of individual carbon fibre/BMI Z-pins in mixed mode delamination at high loading rate using a split Hopkinson bar system. The unstable failure process in quasi-static tests, was also captured with high sampling rate instruments to obtain the complete bridging response. The energy dissipation of the Z-pins were analysed, and it was found that the efficacy of Z-pinning in resisting delamination growth decreased with an increase in mixed mode ratio, with a transition from pull-out to pin rupture occurring. The Z-pin efficacy decreased with loading rate for all mode mix ratios, due to the changing in failure surface with loading rate and rate-dependent frictional sliding.

KW - A. Fracture toughness

KW - B. Failure

KW - C. Delamination

KW - D. 3-Dimensional reinforcement

UR - http://www.scopus.com/inward/record.url?scp=85039172309&partnerID=8YFLogxK

U2 - 10.1016/j.compositesa.2017.11.017

DO - 10.1016/j.compositesa.2017.11.017

M3 - Article (Academic Journal)

AN - SCOPUS:85039172309

SN - 1359-835X

VL - 106

SP - 24

EP - 33

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

ER -

Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

Abstract

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Understanding Delamination Suppression at High Deformation Rates in Through-Thickness Reinforced Laminated Composites

High rate mixed mode testing of z-pinned composites

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Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

Abstract

Keywords

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Understanding Delamination Suppression at High Deformation Rates in Through-Thickness Reinforced Laminated Composites

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High rate mixed mode testing of z-pinned composites

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