Impact damage reduction by structured surface geometry

Yukihiro Kusano*, Vladimir Fedorov, Malcolm McGugan, Tom L. Andersen, Nicolai Frost-Jensen Johansen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Repeated impacts can cause damage to not only a surface but also inside the material. Mechanisms include stress-wave propagation into the material, reflection of the waves at the back surface, and subsequent repeated reflections in the vicinity of the impact and the back surface. Impact damage performance was observed for polyurethane-coated fibre composites with structured geometries at the back surfaces. Repeated impacts by rubber balls on the coated side caused damage and delamination of the coating. The laminates with structured back surfaces showed longer durability than those with a flat back surface. The in-situ acoustic measurement indicates that the acoustic power within the pulse duration
was 25–40% lower using the structured back surfaces. The observed effect can be attributed to scattered reflection at the back surface to reduce the high intensity duration of the acoustic waves.
Original languageEnglish
JournalMaterials Letters
Volume221
Pages (from-to)296-300
ISSN0167-577X
DOIs
Publication statusPublished - 2018

Cite this

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title = "Impact damage reduction by structured surface geometry",
abstract = "Repeated impacts can cause damage to not only a surface but also inside the material. Mechanisms include stress-wave propagation into the material, reflection of the waves at the back surface, and subsequent repeated reflections in the vicinity of the impact and the back surface. Impact damage performance was observed for polyurethane-coated fibre composites with structured geometries at the back surfaces. Repeated impacts by rubber balls on the coated side caused damage and delamination of the coating. The laminates with structured back surfaces showed longer durability than those with a flat back surface. The in-situ acoustic measurement indicates that the acoustic power within the pulse durationwas 25–40{\%} lower using the structured back surfaces. The observed effect can be attributed to scattered reflection at the back surface to reduce the high intensity duration of the acoustic waves.",
author = "Yukihiro Kusano and Vladimir Fedorov and Malcolm McGugan and Andersen, {Tom L.} and Johansen, {Nicolai Frost-Jensen}",
year = "2018",
doi = "10.1016/j.matlet.2018.03.146",
language = "English",
volume = "221",
pages = "296--300",
journal = "Materials Letters",
issn = "0167-577X",
publisher = "Elsevier",

}

Impact damage reduction by structured surface geometry. / Kusano, Yukihiro; Fedorov, Vladimir; McGugan, Malcolm; Andersen, Tom L.; Johansen, Nicolai Frost-Jensen.

In: Materials Letters, Vol. 221, 2018, p. 296-300.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Impact damage reduction by structured surface geometry

AU - Kusano, Yukihiro

AU - Fedorov, Vladimir

AU - McGugan, Malcolm

AU - Andersen, Tom L.

AU - Johansen, Nicolai Frost-Jensen

PY - 2018

Y1 - 2018

N2 - Repeated impacts can cause damage to not only a surface but also inside the material. Mechanisms include stress-wave propagation into the material, reflection of the waves at the back surface, and subsequent repeated reflections in the vicinity of the impact and the back surface. Impact damage performance was observed for polyurethane-coated fibre composites with structured geometries at the back surfaces. Repeated impacts by rubber balls on the coated side caused damage and delamination of the coating. The laminates with structured back surfaces showed longer durability than those with a flat back surface. The in-situ acoustic measurement indicates that the acoustic power within the pulse durationwas 25–40% lower using the structured back surfaces. The observed effect can be attributed to scattered reflection at the back surface to reduce the high intensity duration of the acoustic waves.

AB - Repeated impacts can cause damage to not only a surface but also inside the material. Mechanisms include stress-wave propagation into the material, reflection of the waves at the back surface, and subsequent repeated reflections in the vicinity of the impact and the back surface. Impact damage performance was observed for polyurethane-coated fibre composites with structured geometries at the back surfaces. Repeated impacts by rubber balls on the coated side caused damage and delamination of the coating. The laminates with structured back surfaces showed longer durability than those with a flat back surface. The in-situ acoustic measurement indicates that the acoustic power within the pulse durationwas 25–40% lower using the structured back surfaces. The observed effect can be attributed to scattered reflection at the back surface to reduce the high intensity duration of the acoustic waves.

U2 - 10.1016/j.matlet.2018.03.146

DO - 10.1016/j.matlet.2018.03.146

M3 - Journal article

VL - 221

SP - 296

EP - 300

JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

ER -