Dynamic mode II delamination in through thickness reinforced composites

Mehdi Yasaee; Galal F A Mohamed; A. Pellegrino; Nik Petrinic; Stephen R Hallett

doi:10.1007/978-3-319-42195-7_13

Dynamic mode II delamination in through thickness reinforced composites

Mehdi Yasaee, Galal F A Mohamed, A. Pellegrino, Nik Petrinic, Stephen R Hallett

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

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Abstract

Through thickness reinforcement (TTR) technologies have been shown to provide effective delamination resistance for laminated composite materials. The addition of this reinforcement allows for the design of highly damage tolerant composite structures, specifically when subjected to impact events. The aim of this investigation was to understand the delamination resistance of Z-pinned composites when subjected to increasing strain rates.

Z-pinned laminated composites were manufactured and tested using three point end notched flexure (3ENF) specimens subjected to increasing loading rates from quasi-static (~0 m/s) to high velocity impact (5 m/s), using a range of test equipment including drop weight impact tower and a split Hopkinson bar (SHPB).

Using a high speed impact camera and frame by frame pixel tracking of the strain rates, delamination velocities as well as the apparent fracture toughness of the Z-pinned laminates were measured and analysed. Experimental results indicate that there is a transition in the failure morphology of the Z-pinned laminates from quasi-static to high strain rates. The fundamental physical mechanisms that generate this transition are discussed.

Original language	English
Title of host publication	Fracture, Fatigue, Failure and Damage Evolution
Subtitle of host publication	Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
Editors	Alan T Zehnder, Jay Carroll, Kavan Hazeli, Ryan B Berke, Garrett Pataky, Matthew Cavalli, Alison M Beese
Publisher	Springer International Publishing AG
Pages	91-97
Number of pages	7
Volume	8
ISBN (Electronic)	9783319421957
ISBN (Print)	9783319421940
DOIs	https://doi.org/10.1007/978-3-319-42195-7_13
Publication status	Published - 21 Sep 2016

Structured keywords

Composites UTC

Keywords

Through thickness reinforcement
damage tolerance
delamination testing
Z-pins
strain rate
impact

Access to Document

10.1007/978-3-319-42195-7_13

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Yasaee, M., Mohamed, G. F. A., Pellegrino, A., Petrinic, N., & Hallett, S. R. (2016). Dynamic mode II delamination in through thickness reinforced composites. In A. T. Zehnder, J. Carroll, K. Hazeli, R. B. Berke, G. Pataky, M. Cavalli, & A. M. Beese (Eds.), Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics (Vol. 8, pp. 91-97). Springer International Publishing AG. https://doi.org/10.1007/978-3-319-42195-7_13

Yasaee, Mehdi ; Mohamed, Galal F A ; Pellegrino, A. ; Petrinic, Nik ; Hallett, Stephen R. / Dynamic mode II delamination in through thickness reinforced composites. Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics. editor / Alan T Zehnder ; Jay Carroll ; Kavan Hazeli ; Ryan B Berke ; Garrett Pataky ; Matthew Cavalli ; Alison M Beese. Vol. 8 Springer International Publishing AG, 2016. pp. 91-97

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abstract = "Through thickness reinforcement (TTR) technologies have been shown to provide effective delamination resistance for laminated composite materials. The addition of this reinforcement allows for the design of highly damage tolerant composite structures, specifically when subjected to impact events. The aim of this investigation was to understand the delamination resistance of Z-pinned composites when subjected to increasing strain rates.Z-pinned laminated composites were manufactured and tested using three point end notched flexure (3ENF) specimens subjected to increasing loading rates from quasi-static (~0 m/s) to high velocity impact (5 m/s), using a range of test equipment including drop weight impact tower and a split Hopkinson bar (SHPB).Using a high speed impact camera and frame by frame pixel tracking of the strain rates, delamination velocities as well as the apparent fracture toughness of the Z-pinned laminates were measured and analysed. Experimental results indicate that there is a transition in the failure morphology of the Z-pinned laminates from quasi-static to high strain rates. The fundamental physical mechanisms that generate this transition are discussed.",

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Yasaee, M, Mohamed, GFA, Pellegrino, A, Petrinic, N & Hallett, SR 2016, Dynamic mode II delamination in through thickness reinforced composites. in AT Zehnder, J Carroll, K Hazeli, RB Berke, G Pataky, M Cavalli & AM Beese (eds), Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics. vol. 8, Springer International Publishing AG, pp. 91-97. https://doi.org/10.1007/978-3-319-42195-7_13

Dynamic mode II delamination in through thickness reinforced composites. / Yasaee, Mehdi; Mohamed, Galal F A; Pellegrino, A.; Petrinic, Nik; Hallett, Stephen R.

Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics. ed. / Alan T Zehnder; Jay Carroll; Kavan Hazeli; Ryan B Berke; Garrett Pataky; Matthew Cavalli; Alison M Beese. Vol. 8 Springer International Publishing AG, 2016. p. 91-97.

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

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T1 - Dynamic mode II delamination in through thickness reinforced composites

AU - Yasaee, Mehdi

AU - Mohamed, Galal F A

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AU - Petrinic, Nik

AU - Hallett, Stephen R

PY - 2016/9/21

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N2 - Through thickness reinforcement (TTR) technologies have been shown to provide effective delamination resistance for laminated composite materials. The addition of this reinforcement allows for the design of highly damage tolerant composite structures, specifically when subjected to impact events. The aim of this investigation was to understand the delamination resistance of Z-pinned composites when subjected to increasing strain rates.Z-pinned laminated composites were manufactured and tested using three point end notched flexure (3ENF) specimens subjected to increasing loading rates from quasi-static (~0 m/s) to high velocity impact (5 m/s), using a range of test equipment including drop weight impact tower and a split Hopkinson bar (SHPB).Using a high speed impact camera and frame by frame pixel tracking of the strain rates, delamination velocities as well as the apparent fracture toughness of the Z-pinned laminates were measured and analysed. Experimental results indicate that there is a transition in the failure morphology of the Z-pinned laminates from quasi-static to high strain rates. The fundamental physical mechanisms that generate this transition are discussed.

AB - Through thickness reinforcement (TTR) technologies have been shown to provide effective delamination resistance for laminated composite materials. The addition of this reinforcement allows for the design of highly damage tolerant composite structures, specifically when subjected to impact events. The aim of this investigation was to understand the delamination resistance of Z-pinned composites when subjected to increasing strain rates.Z-pinned laminated composites were manufactured and tested using three point end notched flexure (3ENF) specimens subjected to increasing loading rates from quasi-static (~0 m/s) to high velocity impact (5 m/s), using a range of test equipment including drop weight impact tower and a split Hopkinson bar (SHPB).Using a high speed impact camera and frame by frame pixel tracking of the strain rates, delamination velocities as well as the apparent fracture toughness of the Z-pinned laminates were measured and analysed. Experimental results indicate that there is a transition in the failure morphology of the Z-pinned laminates from quasi-static to high strain rates. The fundamental physical mechanisms that generate this transition are discussed.

KW - Through thickness reinforcement

KW - damage tolerance

KW - delamination testing

KW - Z-pins

KW - strain rate

KW - impact

U2 - 10.1007/978-3-319-42195-7_13

DO - 10.1007/978-3-319-42195-7_13

M3 - Conference Contribution (Conference Proceeding)

SN - 9783319421940

VL - 8

SP - 91

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BT - Fracture, Fatigue, Failure and Damage Evolution

A2 - Zehnder, Alan T

A2 - Carroll, Jay

A2 - Hazeli, Kavan

A2 - Berke, Ryan B

A2 - Pataky, Garrett

A2 - Cavalli, Matthew

A2 - Beese, Alison M

PB - Springer International Publishing AG

ER -

Yasaee M, Mohamed GFA, Pellegrino A, Petrinic N, Hallett SR. Dynamic mode II delamination in through thickness reinforced composites. In Zehnder AT, Carroll J, Hazeli K, Berke RB, Pataky G, Cavalli M, Beese AM, editors, Fracture, Fatigue, Failure and Damage Evolution: Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics. Vol. 8. Springer International Publishing AG. 2016. p. 91-97 https://doi.org/10.1007/978-3-319-42195-7_13