Restricted accessResearch articleFirst published online 2026
Experimental study of an aluminum sandwich panel with aluminum-foam-filled square corrugated carbon-fiber/epoxy core fabricated by friction stir welding
This study investigates the enhancement of the mechanical performance of aluminum sandwich panels by integrating an aluminum-foam-filled, square-corrugated carbon-fiber/epoxy core, fabricated using the friction stir welding (FSW) technique. The aluminum foam was bonded to the top and bottom aluminum face sheets through FSW, while the carbon-fiber/epoxy core was adhesively bonded to the face sheets. The combined interlocking effect of the corrugated carbon-fiber core and the metallic foam filling was designed to improve structural strength and energy absorption. The influence of key FSW parameters—tool rotational speed, traverse speed, tool tilt angle, and tool penetration depth—was also examined. Mechanical performance was evaluated through three-point flexural and compression tests, and fracture morphology was analyzed using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The FSW-fabricated sandwich panels exhibited a flexural strength of 44.6 MPa, compared with 39.8 MPa for non-welded specimens. Similarly, the compressive strength reached 98.7 MPa, demonstrating the effectiveness of combining carbon-fiber reinforcement with aluminum foam filling and FSW bonding. These findings highlight the potential of this hybrid core configuration for lightweight, high-strength structural applications.
Vijaya RamnathBAlagarrajaKElanchezhianC. Review on sandwich composite and their applications. Mater Today Proc2019; 16: 859–864. https://doi.org/10.1016/j.matpr.2019.05.169
2.
WangXGaoYMcDonnellM, et al.On the solid-state-bonding mechanism in friction stir welding. Extreme Mech Lett2020; 37: 100727. https://doi.org/10.1016/j.eml.2020.100727
PengPWangKWangW, et al.High-performance aluminium foam sandwich prepared through friction stir welding. Mater Lett. Epub ahead of print2018; 236: 295–298. https://doi.org/10.1016/j.matlet.2018.10.125
6.
SunZHuXSunS, et al.Energy-absorption enhancement in carbon-fiber aluminum-foam sandwich structures from short aramid-fiber interfacial reinforcement. Compos Sci Technol2013; 77: 14–21. https://doi.org/10.1016/j.compscitech.2013.01.016
7.
WangNChenXLiA, et al.Three-point bending performance of a new aluminum foam composite structure. Trans Nonferrous Met Soc China2016; 26: 359–368. https://doi.org/10.1016/s1003-6326(16)64088-8
8.
HangaiYKamadaHUtsunomiyaT, et al.Aluminum alloy foam core sandwich panels fabricated from die casting aluminum alloy by friction stir welding route. J Mater Process Technol2014; 214: 1928–1934. https://doi.org/10.1016/j.jmatprotec.2014.04.010
9.
ZhouJWangYLiuJ, et al.Temperature effects on the compressive properties and failure mechanisms of composite sandwich panel with Y-shaped cores. Composer Part A. Epub ahead of print2018; 114: 72–85. DOI: 10.1016/j.compositesa.2018.08.003.
10.
ZanganaSEpaarachchiJFerdousW, et al.A novel hybridised composite sandwich core with glass, kevlar and zylon fi bres – investigation under low-velocity impact. Int J Impact Eng2020; 137: 103430. https://doi.org/10.1016/j.ijimpeng.2019.103430
11.
RostamiyanYNorouziH. Flatwise compression strength and energy absorption. Strength Mater. Epub ahead of print2016; 48: 84–94. DOI: 10.1007/s11223-017-9827-y.
12.
VermaKSPanthiSKMondalDP. Compressive deformation behavior of closed cell LM-13 aluminum alloy foam using finite element analysis. Mater Today Proc2019; 28: 1073–1077. https://doi.org/10.1016/j.matpr.2020.01.081
HanBZhangZJZhangQC, et al.Recent advances in hybrid lattice-cored sandwiches for enhanced multifunctional performance. Extreme Mech Lett2017; 10: 58–69. https://doi.org/10.1016/j.eml.2016.11.009
15.
XiongJVaziriAGhoshR, et al.Compression behavior and energy absorption of carbon fiber reinforced composite sandwich panels made of three-dimensional honeycomb grid cores. Extreme Mech Lett2016; 7: 114–120. https://doi.org/10.1016/j.eml.2016.02.012
16.
DuanSTaoYLeiH, et al.Enhanced out-of-plane compressive strength and energy absorption of 3D printed square and hexagonal honeycombs with variable-thickness cell edges. Extreme Mech Lett2018; 18: 9–18. https://doi.org/10.1016/j.eml.2017.09.016
17.
BraunMIváñezI. Numerical study of damaged micro-lattice blocks subjected to uniaxial compressive loading. Extreme Mech Lett2020; 39: 100821. https://doi.org/10.1016/j.eml.2020.100821
18.
MikhailovVGFritzscheSHantelmannC, et al.Aluminum foam sandwiches for lightweight structures. Met Sci Heat Treat2018; 60: 44–49. https://doi.org/10.1007/s11041-018-0238-x
19.
UtsunomiyaTOtsukiKHangaiY. Fabrication of aluminum foam core sandwich using sandwich-type foamable precursor with two face sheets by friction stir welding route. Mater Trans2018; 59: 999–1004. https://doi.org/10.2320/matertrans.m2018037
20.
ShunmugasamyVCMansoorB. Aluminum foam sandwich with density-graded open-cell core: compressive and flexural response. Mater Sci Eng, A2018; 731: 220–230. https://doi.org/10.1016/j.msea.2018.06.048
21.
VermaNKumarRZafarS, et al.Vacuum-assisted microwave curing of epoxy/carbon fiber composite: an attempt for defect reduction in processing. Manuf Lett2020; 24: 127–131. https://doi.org/10.1016/j.mfglet.2020.04.010
22.
YanLLYuBHanB, et al.Compressive strength and energy absorption of sandwich panels with aluminum foam-filled corrugated cores. Compos Sci Technol2013; 86: 142–148. https://doi.org/10.1016/j.compscitech.2013.07.011
23.
MatsumotoRSakaguchiHOtsuM, et al.Plastic joining of open-cell nickel foam and polymethyl methacrylate (PMMA) sheet by friction stir incremental forming. J Mater Process Technol2020; 282: 116691. https://doi.org/10.1016/j.jmatprotec.2020.116691
24.
MirzaFMackJPBanikA, et al.Post impact flexural behavior investigation of hybrid foam-core sandwich composites at extreme arctic temperature. Compos Sci Technol. Epub ahead of print2024; 258: 236–245. DOI: 10.1016/j.compscitech.2024.110897.
25.
MiyagawaYGotoKAraiM, et al.Flexural properties of thin foam hybrid core sandwich panels with honeycomb cut in three-point bending: experimental investigation and numerical analysis. Compos Struct. Epub ahead of print2025; 371: 63–75. DOI: 10.1016/j.compstruct.2025.119477.
GaiDYangSXuH, et al.Study on flexural resilience of composite foam sandwich structures under hygrothermal environment. AIP Adv2024; 14: 2023–2024. https://doi.org/10.1063/5.0230348
28.
JunaediHAbd El-bakyMAAwdAMM, et al.Mechanical characteristics of sandwich structures with 3D-Printed bio-inspired gyroid structure core and carbon fiber-reinforced polymer laminate face-sheet. Polymers (Basel). Epub ahead of print2024; 16. DOI: 10.3390/polym16121698.
29.
RuppPElsnerPWeidenmannKA. Specific bending stiffness of in-mould-assembled hybrid sandwich structures with carbon fibre reinforced polymer face sheets and aluminium foam cores manufactured by a polyurethane-spraying process. Journal of Sandwich Structures & Materials. 2019; 21(8): 2779–2800. DOI: 10.1177/1099636217725250.
30.
TranMTVuXHFerrierE. Experimental and analytical analysis of the effect of fibre treatment on the thermomechanical behaviour of continuous carbon textile subjected to simultaneous elevated temperature and uniaxial tensile loadings. Constr Build Mater2018; 183: 32–45. https://doi.org/10.1016/j.conbuildmat.2018.06.114
NazariAKabirMHosseini ToudeshkyH. Investigation of elastomeric foam response applied as core for composite sandwich beams through progressive failure of the beams. Journal of Sandwich Structures & Materials. 2019; 21(2): 604–638. DOI: 10.1177/1099636217697496.
LiZZhengZYuJ, et al.Deformation and failure mechanisms of sandwich beams under three-point bending at elevated temperatures. Compos Struct2014; 111: 285–290. https://doi.org/10.1016/j.compstruct.2014.01.005
