Flexural performance of Kevlar-reinforced sandwich composites with lightweight pumice-filled epoxy cores

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F25%3A10260072" target="_blank" >RIV/61989100:27230/25:10260072 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:001572109300001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:001572109300001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2025.09.001" target="_blank" >10.1016/j.jmrt.2025.09.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flexural performance of Kevlar-reinforced sandwich composites with lightweight pumice-filled epoxy cores

Popis výsledku v původním jazyce

The current investigation evaluates the flexural behavior of a novel sandwich composite with a lightweight pumice core reinforced by Kevlar fibers. Four different types of epoxy cores with varying pumice content (2.5, 5, 7.5 and 10 wt%) were prepared with constant 40 wt% of Kevlar fiber content. Open mold casting was used to prepare the core while the sandwich composites were manufactured using an in-house built closed mold. Influence of pumice content on the flexural properties of sandwich composites were evaluated by experimental and numerical approach. 3-point flexure test results indicate pumice reinforcement significantly enhances the modulus and strength of composites owing to the higher tendency to resist buckling loads. Composites with 10 wt% of pumice content reveal 31 % higher strength as compared with 2.5 wt% composites, owing to well-bonded and evenly distributed pumice particles leading to a higher interfacial shear strength and thereby mitigating core failure and delay in delamination. The correlations between the structure and property were analyzed using scanning electron micrographs. The numerical simulation results serve to reinforce the conclusions drawn from the study. These findings demonstrate a strong alignment with experimental observations, with a notable 3 % reduction in accuracy. The developed sandwich composites show potential for diverse structural and semi-structural applications, including protective panels, aerospace and automotive structures. © 2025 The Authors.

Název v anglickém jazyce

Flexural performance of Kevlar-reinforced sandwich composites with lightweight pumice-filled epoxy cores

Popis výsledku anglicky

The current investigation evaluates the flexural behavior of a novel sandwich composite with a lightweight pumice core reinforced by Kevlar fibers. Four different types of epoxy cores with varying pumice content (2.5, 5, 7.5 and 10 wt%) were prepared with constant 40 wt% of Kevlar fiber content. Open mold casting was used to prepare the core while the sandwich composites were manufactured using an in-house built closed mold. Influence of pumice content on the flexural properties of sandwich composites were evaluated by experimental and numerical approach. 3-point flexure test results indicate pumice reinforcement significantly enhances the modulus and strength of composites owing to the higher tendency to resist buckling loads. Composites with 10 wt% of pumice content reveal 31 % higher strength as compared with 2.5 wt% composites, owing to well-bonded and evenly distributed pumice particles leading to a higher interfacial shear strength and thereby mitigating core failure and delay in delamination. The correlations between the structure and property were analyzed using scanning electron micrographs. The numerical simulation results serve to reinforce the conclusions drawn from the study. These findings demonstrate a strong alignment with experimental observations, with a notable 3 % reduction in accuracy. The developed sandwich composites show potential for diverse structural and semi-structural applications, including protective panels, aerospace and automotive structures. © 2025 The Authors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Research and Technology

ISSN

2238-7854

e-ISSN

—

Svazek periodika

38

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

5964-5972

Kód UT WoS článku

001572109300001

EID výsledku v databázi Scopus

2-s2.0-105025643124