Experimental investigation of high strain-rate, large-scale crack bridging behaviour of z-pin reinforced tapered laminates

A.D. Cochrane; J. Serra; J.K. Lander; H. Böhm; T. Wollmann; A. Hornig; M. Gude; I.K. Partridge; S.R. Hallett

doi:10.1016/j.compositesa.2022.106825

Experimental investigation of high strain-rate, large-scale crack bridging behaviour of z-pin reinforced tapered laminates

A.D. Cochrane, J. Serra, J.K. Lander, H. Böhm, T. Wollmann, A. Hornig, M. Gude, I.K. Partridge, S.R. Hallett^*

^*Corresponding author for this work

National Manufacturing Institute Scotland

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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Abstract

Significant research exists on small-scale, quasi-static failure behaviour of Z-pinned composite laminates. However, little work has been conducted on large-scale, high strain-rate behaviour of Z-pinned composites at structural level. Small-scale testing is often at an insufficient scale to invoke the full crack bridging effects of the Z-pins. Full-scale testing on real components involves large length scales, complex geometries and resulting failure mechanisms that make it difficult to identify the specific effect of Z-pins on the component failure behaviour. A novel cantilever soft body impact test has been developed which is of sufficient scale to invoke large-scale delamination, such that behaviour in Z-pin arrays at high strain-rates can be studied. Laminates containing Z-pin arrays were subjected to soft-body gelatine impact in high-speed light gas-gun tests. Detailed fractographic investigation was carried out to investigate the dynamic failure behaviour of Z-pins at the microscopic scale.

Original language	English
Article number	106825
Number of pages	13
Journal	Composites Part A: Applied Science and Manufacturing
Volume	155
Early online date	1 Feb 2022
DOIs	https://doi.org/10.1016/j.compositesa.2022.106825
Publication status	Published - 30 Dec 2022

Funding

The authors wish to acknowledge the support of Rolls-Royce plc through the Composites University Technology Centre (UTC) at the University of Bristol and through the Lightweight Structures and Materials and Robust Design UTC at the Technische Universität Dresden. The EPSRC, United Kingdom is acknowledged through the Centre for Doctoral Training in Composites Manufacture (grant no. EP/L015102/1 ) as well as the “Understanding Delamination Suppression at High Deformation Rates in Through-Thickness Reinforced Laminated Composites” project (grant no. EP/M015319/1 ).

Keywords

3-Dimensional reinforcement
delamination
impact behaviour
laminates

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Cochrane-etal-CPAASM-2022-Experimental-investigation-of-high-strain-rate-large-scale-crack-bridging-behaviour-of-z-pinFinal published version, 7.12 MBLicence: CC BY 4.0

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Cochrane, A. D., Serra, J., Lander, J. K., Böhm, H., Wollmann, T., Hornig, A., Gude, M., Partridge, I. K., & Hallett, S. R. (2022). Experimental investigation of high strain-rate, large-scale crack bridging behaviour of z-pin reinforced tapered laminates. Composites Part A: Applied Science and Manufacturing, 155, Article 106825. https://doi.org/10.1016/j.compositesa.2022.106825

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abstract = "Significant research exists on small-scale, quasi-static failure behaviour of Z-pinned composite laminates. However, little work has been conducted on large-scale, high strain-rate behaviour of Z-pinned composites at structural level. Small-scale testing is often at an insufficient scale to invoke the full crack bridging effects of the Z-pins. Full-scale testing on real components involves large length scales, complex geometries and resulting failure mechanisms that make it difficult to identify the specific effect of Z-pins on the component failure behaviour. A novel cantilever soft body impact test has been developed which is of sufficient scale to invoke large-scale delamination, such that behaviour in Z-pin arrays at high strain-rates can be studied. Laminates containing Z-pin arrays were subjected to soft-body gelatine impact in high-speed light gas-gun tests. Detailed fractographic investigation was carried out to investigate the dynamic failure behaviour of Z-pins at the microscopic scale.",

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AU - Cochrane, A.D.

AU - Serra, J.

AU - Lander, J.K.

AU - Böhm, H.

AU - Wollmann, T.

AU - Hornig, A.

AU - Gude, M.

AU - Partridge, I.K.

AU - Hallett, S.R.

PY - 2022/12/30

Y1 - 2022/12/30

N2 - Significant research exists on small-scale, quasi-static failure behaviour of Z-pinned composite laminates. However, little work has been conducted on large-scale, high strain-rate behaviour of Z-pinned composites at structural level. Small-scale testing is often at an insufficient scale to invoke the full crack bridging effects of the Z-pins. Full-scale testing on real components involves large length scales, complex geometries and resulting failure mechanisms that make it difficult to identify the specific effect of Z-pins on the component failure behaviour. A novel cantilever soft body impact test has been developed which is of sufficient scale to invoke large-scale delamination, such that behaviour in Z-pin arrays at high strain-rates can be studied. Laminates containing Z-pin arrays were subjected to soft-body gelatine impact in high-speed light gas-gun tests. Detailed fractographic investigation was carried out to investigate the dynamic failure behaviour of Z-pins at the microscopic scale.

AB - Significant research exists on small-scale, quasi-static failure behaviour of Z-pinned composite laminates. However, little work has been conducted on large-scale, high strain-rate behaviour of Z-pinned composites at structural level. Small-scale testing is often at an insufficient scale to invoke the full crack bridging effects of the Z-pins. Full-scale testing on real components involves large length scales, complex geometries and resulting failure mechanisms that make it difficult to identify the specific effect of Z-pins on the component failure behaviour. A novel cantilever soft body impact test has been developed which is of sufficient scale to invoke large-scale delamination, such that behaviour in Z-pin arrays at high strain-rates can be studied. Laminates containing Z-pin arrays were subjected to soft-body gelatine impact in high-speed light gas-gun tests. Detailed fractographic investigation was carried out to investigate the dynamic failure behaviour of Z-pins at the microscopic scale.

KW - 3-Dimensional reinforcement

KW - delamination

KW - impact behaviour

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VL - 155

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

M1 - 106825

ER -

Experimental investigation of high strain-rate, large-scale crack bridging behaviour of z-pin reinforced tapered laminates

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