Recycling CF/PEEK offcut waste from laser assisted tape placement: Influence of overlaps and gaps

Aswani Kumar Bandaru; Thomas Anderson; Paul M. Weaver

doi:10.1016/j.compositesa.2024.108104

Recycling CF/PEEK offcut waste from laser assisted tape placement: Influence of overlaps and gaps

Aswani Kumar Bandaru, Thomas Anderson, Paul M. Weaver

University of Limerick

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

Abstract

A recycling method for waste CF/PEEK prepreg tapes is proposed that uses offcuts from laser assisted tape placement (LATP) processing, without shredding, grinding or further cutting. Laminates (using the prepreg waste) representing different configurations were manufactured considering overlaps and gaps reflecting observed defects in LATP. Interlaminar shear strengths (ILSS) with 0° fibre (Parallel) and bending strength for 90° fibre (Normal) directions were measured. The parallel samples with 3 mm overlap had the highest ILSS (100.3 MPa) while the 2 mm gapped samples had the lowest ILSS (58.7 MPa). The Normal samples failed at the surface due to matrix-dominated failure providing bending strengths between 44.0 MPa and 82.1 MPa. Failure mechanisms were identified similar to that of non-recycled composites reported in the literature (50–120 MPa), indicating that the recycled prepreg tapes retained approximately 84 % of the ILSS of the highest reported values.

Original language	English
Article number	108104
Journal	Composites Part A: Applied Science and Manufacturing
Volume	180
DOIs	https://doi.org/10.1016/j.compositesa.2024.108104
Publication status	Published - May 2024

Keywords

CF/PEEK
ILSS
LATP
Recycling

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10.1016/j.compositesa.2024.108104

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@article{846a8b35011d4e89a339d2a592d1d048,

title = "Recycling CF/PEEK offcut waste from laser assisted tape placement: Influence of overlaps and gaps",

abstract = "A recycling method for waste CF/PEEK prepreg tapes is proposed that uses offcuts from laser assisted tape placement (LATP) processing, without shredding, grinding or further cutting. Laminates (using the prepreg waste) representing different configurations were manufactured considering overlaps and gaps reflecting observed defects in LATP. Interlaminar shear strengths (ILSS) with 0° fibre (Parallel) and bending strength for 90° fibre (Normal) directions were measured. The parallel samples with 3 mm overlap had the highest ILSS (100.3 MPa) while the 2 mm gapped samples had the lowest ILSS (58.7 MPa). The Normal samples failed at the surface due to matrix-dominated failure providing bending strengths between 44.0 MPa and 82.1 MPa. Failure mechanisms were identified similar to that of non-recycled composites reported in the literature (50–120 MPa), indicating that the recycled prepreg tapes retained approximately 84 \% of the ILSS of the highest reported values.",

keywords = "CF/PEEK, ILSS, LATP, Recycling",

author = "\{Kumar Bandaru\}, Aswani and Thomas Anderson and Weaver, \{Paul M.\}",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)",

year = "2024",

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doi = "10.1016/j.compositesa.2024.108104",

language = "English",

volume = "180",

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

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TY - JOUR

T1 - Recycling CF/PEEK offcut waste from laser assisted tape placement

T2 - Influence of overlaps and gaps

AU - Kumar Bandaru, Aswani

AU - Anderson, Thomas

AU - Weaver, Paul M.

PY - 2024/5

Y1 - 2024/5

N2 - A recycling method for waste CF/PEEK prepreg tapes is proposed that uses offcuts from laser assisted tape placement (LATP) processing, without shredding, grinding or further cutting. Laminates (using the prepreg waste) representing different configurations were manufactured considering overlaps and gaps reflecting observed defects in LATP. Interlaminar shear strengths (ILSS) with 0° fibre (Parallel) and bending strength for 90° fibre (Normal) directions were measured. The parallel samples with 3 mm overlap had the highest ILSS (100.3 MPa) while the 2 mm gapped samples had the lowest ILSS (58.7 MPa). The Normal samples failed at the surface due to matrix-dominated failure providing bending strengths between 44.0 MPa and 82.1 MPa. Failure mechanisms were identified similar to that of non-recycled composites reported in the literature (50–120 MPa), indicating that the recycled prepreg tapes retained approximately 84 % of the ILSS of the highest reported values.

AB - A recycling method for waste CF/PEEK prepreg tapes is proposed that uses offcuts from laser assisted tape placement (LATP) processing, without shredding, grinding or further cutting. Laminates (using the prepreg waste) representing different configurations were manufactured considering overlaps and gaps reflecting observed defects in LATP. Interlaminar shear strengths (ILSS) with 0° fibre (Parallel) and bending strength for 90° fibre (Normal) directions were measured. The parallel samples with 3 mm overlap had the highest ILSS (100.3 MPa) while the 2 mm gapped samples had the lowest ILSS (58.7 MPa). The Normal samples failed at the surface due to matrix-dominated failure providing bending strengths between 44.0 MPa and 82.1 MPa. Failure mechanisms were identified similar to that of non-recycled composites reported in the literature (50–120 MPa), indicating that the recycled prepreg tapes retained approximately 84 % of the ILSS of the highest reported values.

KW - CF/PEEK

KW - ILSS

KW - LATP

KW - Recycling

UR - https://www.scopus.com/pages/publications/85186737040

U2 - 10.1016/j.compositesa.2024.108104

DO - 10.1016/j.compositesa.2024.108104

M3 - Article

AN - SCOPUS:85186737040

SN - 1359-835X

VL - 180

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

M1 - 108104

ER -

Recycling CF/PEEK offcut waste from laser assisted tape placement: Influence of overlaps and gaps

Abstract

Keywords

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