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On the influence of low-velocity impact damage on constrained-layer damping in hybrid CFRP-elastomer-metal laminates

Jackstadt, Alexander ORCID iD icon 1; Liebig, Wilfried V. ORCID iD icon 2; Weidenmann, Kay A.; Kärger, Luise ORCID iD icon 1
1 Institut für Fahrzeugsystemtechnik (FAST), Karlsruher Institut für Technologie (KIT)
2 Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Karlsruher Institut für Technologie (KIT)

Abstract:

Following the principle of constrained-layer damping (CLD), fiber-metal-elastomer laminates (FMELs) offer a high potential for damped lightweight structures, overcoming the undesirable vibration characteristics of conventional lightweight materials. While proven to be versatile and efficient, the damage-tolerance of such laminates is unexplored. This study for the first time in literature addresses the damage-tolerance of this efficient damping mechanism using a combined experimental and numerical approach. Results of experimental low-velocity impact tests on different configurations of FMELs are presented. In subsequent numerical modal analyses, different types of damage, namely delaminations, intra-ply damage and permanent deformation, are modeled and their influence on the vibrational behavior is investigated. While all types of damage influence the natural frequencies and modal damping ratios with a strong mode dependency, all laminates retain a high amount of modal damping with losses typically not higher than 15%. The results obtained reveal, that CLD is an efficient intrinsic damping measure in FMELs even in the presence of different types of damage. ... mehr

Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.03.2024
Sprache Englisch
Identifikator ISSN: 0264-1275
KITopen-ID: 1000169753
Erschienen in Materials & Design
Verlag Elsevier
Band 241
Seiten Article no: 112882
Projektinformation SPP 1897 (DFG, DFG KOORD, KA 4224/3-2)
SPP 1897 (DFG, DFG KOORD, WE 4273/16-2)
DFG, DFG EIN, KA 4224/10-1
Schlagwörter Fiber metal laminates, Vibration, Damping, Viscoelasticity, Elastomers, Finite element simulation
Nachgewiesen in Scopus
Dimensions
Web of Science
OpenAlex
Relationen in KITopen

Verlagsausgabe §
DOI: 10.5445/IR/1000169753
Veröffentlicht am 08.04.2024
Originalveröffentlichung
DOI: 10.1016/j.matdes.2024.112882
Scopus
Zitationen: 3
Web of Science
Zitationen: 2
Dimensions
Zitationen: 3
Seitenaufrufe: 86
seit 08.04.2024
Downloads: 31
seit 08.04.2024
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