A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP

Publikation: Beitrag in FachzeitschriftKonferenzaufsatz in FachzeitschriftForschungPeer-Review

Autoren

  • H. Dittmar
  • P. Jaeschke
  • S. Kaierle
  • L. Overmeyer

Externe Organisationen

  • Laser Zentrum Hannover e.V. (LZH)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)895-900
Seitenumfang6
FachzeitschriftProcedia CIRP
Jahrgang94
Frühes Online-Datum15 Sept. 2020
PublikationsstatusVeröffentlicht - 2020
Extern publiziertJa
Veranstaltung11th CIRP Conference on Photonic Technologies, LANE 2020 - Virtual, Online
Dauer: 7 Sept. 202010 Sept. 2020

Abstract

This research focusses on the analysis of two near-infrared (NIR) lasers' characteristics with regard to the resulting interlaminar fracture toughness and the identification of a sweet spot for delamination free laser ablation of CFRP. Earlier studies showed that nanosecond-pulsed UV and MIR lasers are able to ablate CFRP without causing an increased risk for delamination as opposed to NIR lasers. However, NIR lasers are more flexible regarding industrial integration. Therefore, the risk of delamination induced by NIR radiation needs to be minimised. It stems from the CFRP's optical properties and leads to NIR radiation to be mostly absorbed on the carbon fibres' surface, indirectly removing the matrix and thus risking delamination below the fibres. Mode I interlaminar fracture toughness (GIc) tests evaluate this risk, using two adhesively bonded CFRP surfaces, where one surface received surface treatment. In this work, experiments with two NIR lasers achieved GIc results that matched or surpassed those of mechanically milled references.

ASJC Scopus Sachgebiete

Zitieren

A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP. / Dittmar, H.; Jaeschke, P.; Kaierle, S. et al.
in: Procedia CIRP, Jahrgang 94, 2020, S. 895-900.

Publikation: Beitrag in FachzeitschriftKonferenzaufsatz in FachzeitschriftForschungPeer-Review

Dittmar, H, Jaeschke, P, Kaierle, S & Overmeyer, L 2020, 'A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP', Procedia CIRP, Jg. 94, S. 895-900. https://doi.org/10.1016/j.procir.2020.09.068
Dittmar, H., Jaeschke, P., Kaierle, S., & Overmeyer, L. (2020). A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP. Procedia CIRP, 94, 895-900. https://doi.org/10.1016/j.procir.2020.09.068
Dittmar H, Jaeschke P, Kaierle S, Overmeyer L. A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP. Procedia CIRP. 2020;94:895-900. Epub 2020 Sep 15. doi: 10.1016/j.procir.2020.09.068
Dittmar, H. ; Jaeschke, P. ; Kaierle, S. et al. / A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP. in: Procedia CIRP. 2020 ; Jahrgang 94. S. 895-900.
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abstract = "This research focusses on the analysis of two near-infrared (NIR) lasers' characteristics with regard to the resulting interlaminar fracture toughness and the identification of a sweet spot for delamination free laser ablation of CFRP. Earlier studies showed that nanosecond-pulsed UV and MIR lasers are able to ablate CFRP without causing an increased risk for delamination as opposed to NIR lasers. However, NIR lasers are more flexible regarding industrial integration. Therefore, the risk of delamination induced by NIR radiation needs to be minimised. It stems from the CFRP's optical properties and leads to NIR radiation to be mostly absorbed on the carbon fibres' surface, indirectly removing the matrix and thus risking delamination below the fibres. Mode I interlaminar fracture toughness (GIc) tests evaluate this risk, using two adhesively bonded CFRP surfaces, where one surface received surface treatment. In this work, experiments with two NIR lasers achieved GIc results that matched or surpassed those of mechanically milled references.",
keywords = "Adhesive bonding, CFRP, Composite repair, GIc, Laser ablation, Surface treatment",
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TY - JOUR

T1 - A study of the effects of NIR laser radiation on interlaminar fracture toughness of CFRP

AU - Dittmar, H.

AU - Jaeschke, P.

AU - Kaierle, S.

AU - Overmeyer, L.

N1 - Funding Information: Acknowledgment. This work was supported in part by the UK EPSRC under grant EP/I500952/1.

PY - 2020

Y1 - 2020

N2 - This research focusses on the analysis of two near-infrared (NIR) lasers' characteristics with regard to the resulting interlaminar fracture toughness and the identification of a sweet spot for delamination free laser ablation of CFRP. Earlier studies showed that nanosecond-pulsed UV and MIR lasers are able to ablate CFRP without causing an increased risk for delamination as opposed to NIR lasers. However, NIR lasers are more flexible regarding industrial integration. Therefore, the risk of delamination induced by NIR radiation needs to be minimised. It stems from the CFRP's optical properties and leads to NIR radiation to be mostly absorbed on the carbon fibres' surface, indirectly removing the matrix and thus risking delamination below the fibres. Mode I interlaminar fracture toughness (GIc) tests evaluate this risk, using two adhesively bonded CFRP surfaces, where one surface received surface treatment. In this work, experiments with two NIR lasers achieved GIc results that matched or surpassed those of mechanically milled references.

AB - This research focusses on the analysis of two near-infrared (NIR) lasers' characteristics with regard to the resulting interlaminar fracture toughness and the identification of a sweet spot for delamination free laser ablation of CFRP. Earlier studies showed that nanosecond-pulsed UV and MIR lasers are able to ablate CFRP without causing an increased risk for delamination as opposed to NIR lasers. However, NIR lasers are more flexible regarding industrial integration. Therefore, the risk of delamination induced by NIR radiation needs to be minimised. It stems from the CFRP's optical properties and leads to NIR radiation to be mostly absorbed on the carbon fibres' surface, indirectly removing the matrix and thus risking delamination below the fibres. Mode I interlaminar fracture toughness (GIc) tests evaluate this risk, using two adhesively bonded CFRP surfaces, where one surface received surface treatment. In this work, experiments with two NIR lasers achieved GIc results that matched or surpassed those of mechanically milled references.

KW - Adhesive bonding

KW - CFRP

KW - Composite repair

KW - GIc

KW - Laser ablation

KW - Surface treatment

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DO - 10.1016/j.procir.2020.09.068

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JO - Procedia CIRP

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SN - 2212-8271

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