Details
| Original language | English |
|---|---|
| Pages (from-to) | 895-900 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 94 |
| Early online date | 15 Sept 2020 |
| Publication status | Published - 2020 |
| Externally published | Yes |
| Event | 11th CIRP Conference on Photonic Technologies, LANE 2020 - Virtual, Online Duration: 7 Sept 2020 → 10 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.
Keywords
- Adhesive bonding, CFRP, Composite repair, GIc, Laser ablation, Surface treatment
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 94, 2020, p. 895-900.
Research output: Contribution to journal › Conference article › Research › peer review
}
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
UR - http://www.scopus.com/inward/record.url?scp=85093365865&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2020.09.068
DO - 10.1016/j.procir.2020.09.068
M3 - Conference article
AN - SCOPUS:85093365865
VL - 94
SP - 895
EP - 900
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 11th CIRP Conference on Photonic Technologies, LANE 2020
Y2 - 7 September 2020 through 10 September 2020
ER -