Modal analysis of functionally oriented fabric laminate with 20 mm wide carbon strips and a 20 mm notch

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modal analysis of functionally oriented fabric laminate with 20 mm wide carbon strips and a 20 mm notch

Popis výsledku v původním jazyce

Functionally oriented fabric (FOF) is a woven textile with irregularly distributed secondary material strips in both warp and weft directions. Strips form a pattern and locally improve mechanical properties of a laminate, especially around an opening. Major material is low-cost fiber roving and minor material is a high mechanical property roving, such as carbon fiber. The subject of this work is to analyze the effect of different FOF laminate layups on natural frequen-cies of the laminate with a notch. The layups are “0/90”, “0/30/60” and “0/45” as the most used configurations for quasi-isotropic laminate structure. The width of strip is 20 mm, span of strips is 20 mm and there is a 20 mm notch in the center of the plate. Modal analysis has been made on laminates with 6 laminae through thickness so the influence of geometry variation can be neglected. The benefit of a functionally oriented fabric structure is in increased natural frequency for twisting (1st and 3rd) and bending (2nd and 4th) modes in comparison with pure glass laminate. The increase in frequency in 1st mode is-3% for [0°/90°2]s layup, 12.9% for [0°/30°/60°]s layup and 30.3% for [0°/45°2]s layup; increase in 2nd mode is 27.7% for [0°/90°2]s layup, 29.8% for [0°/30°/60°]s layup and 43.7% for [0°/45°2]s layup; increase in 3rd mode is 3.9% for [0°/90°2]s layup, 9.6% for [0°/30°/60°]s layup and 26.7% for [0°/45°2]s layup; and increase in 4th mode is 22.6% for [0°/90°2]s layup, 25.3% for [0°/30°/60°]s layup and 37.6% for [0°/45°2]s layup. These enhancements help to prevent resonance in standard operating frequencies of mechanisms and machines, thus extending their opera-tional lifespan. Additionally, the strategic placement of functional material strips around structural openings provides increased stiffness without the need for extra layers, effectively reducing the laminate’s overall mass. This study highlights the potential of FOF to improve the dynamic performance and lifespan of laminated composite structures used in various engineering applications.

Název v anglickém jazyce

Modal analysis of functionally oriented fabric laminate with 20 mm wide carbon strips and a 20 mm notch

Popis výsledku anglicky

Functionally oriented fabric (FOF) is a woven textile with irregularly distributed secondary material strips in both warp and weft directions. Strips form a pattern and locally improve mechanical properties of a laminate, especially around an opening. Major material is low-cost fiber roving and minor material is a high mechanical property roving, such as carbon fiber. The subject of this work is to analyze the effect of different FOF laminate layups on natural frequen-cies of the laminate with a notch. The layups are “0/90”, “0/30/60” and “0/45” as the most used configurations for quasi-isotropic laminate structure. The width of strip is 20 mm, span of strips is 20 mm and there is a 20 mm notch in the center of the plate. Modal analysis has been made on laminates with 6 laminae through thickness so the influence of geometry variation can be neglected. The benefit of a functionally oriented fabric structure is in increased natural frequency for twisting (1st and 3rd) and bending (2nd and 4th) modes in comparison with pure glass laminate. The increase in frequency in 1st mode is-3% for [0°/90°2]s layup, 12.9% for [0°/30°/60°]s layup and 30.3% for [0°/45°2]s layup; increase in 2nd mode is 27.7% for [0°/90°2]s layup, 29.8% for [0°/30°/60°]s layup and 43.7% for [0°/45°2]s layup; increase in 3rd mode is 3.9% for [0°/90°2]s layup, 9.6% for [0°/30°/60°]s layup and 26.7% for [0°/45°2]s layup; and increase in 4th mode is 22.6% for [0°/90°2]s layup, 25.3% for [0°/30°/60°]s layup and 37.6% for [0°/45°2]s layup. These enhancements help to prevent resonance in standard operating frequencies of mechanisms and machines, thus extending their opera-tional lifespan. Additionally, the strategic placement of functional material strips around structural openings provides increased stiffness without the need for extra layers, effectively reducing the laminate’s overall mass. This study highlights the potential of FOF to improve the dynamic performance and lifespan of laminated composite structures used in various engineering applications.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceeedings of ICOVP WMVC 2025-Recent Trends in Vibration Problems and Wave Propagation

ISBN

978-3-032-13225-3

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

607-615

Název nakladatele

Springer

Místo vydání

Cham, Switzerland

Místo konání akce

Lisbon, Portugal

Datum konání akce

1. 1. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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