Flexural performance of Kevlar-reinforced sandwich composites with lightweight pumice-filled epoxy cores
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Flexural performance of Kevlar-reinforced sandwich composites with lightweight pumice-filled epoxy cores
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Research and Technology
ISSN
2238-7854
e-ISSN
—
Volume of the periodical
38
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
5964-5972
UT code for WoS article
001572109300001
EID of the result in the Scopus database
2-s2.0-105025643124