Experimental and numerical analysis of additively manufactured foamed sandwich beams

Yousefi Kanani, A. and Kennedy, A. (2023) Experimental and numerical analysis of additively manufactured foamed sandwich beams. Composite Structures, 312: 116866. ISSN 0263-8223

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This work examines the feasibility of using foamable polymer filaments to create lightweight composite beams using additive manufacturing. To accomplish this, monolithic and sandwich beams, with non-foamed face sheets and a foam core were fabricated using MEX 3D printers. The non-foamed and foamed PLA components were created by extruding foamable PLA with nozzle temperatures of 200 °C and 220 °C, respectively. Tensile testing samples were printed and tested and used to provide data for numerical models. A range of different sandwich structures were printed and tested in 3-point bending and their performance was compared to monolithic non-foamed and foam beams and to analytical and numerical models. The stiffness, yield load, and maximum load of sandwich beams with non-foamed face sheets and foamed cores are much greater than those of pure foamed beams. With sandwich foam beams, weight reductions of around 30 % are both observed and predicted compared to non-foamed beams with equivalent stiffness. Analytical and numerical models using experimental data show value in aiding the design of sandwich structures of this type.

Item Type:
Journal Article
Journal or Publication Title:
Composite Structures
Uncontrolled Keywords:
Research Output Funding/yes_externally_funded
?? additive manufacturingfused deposition modellingfoamable polylactic acid filamentporous structureslightweight composite beamyes - externally fundednocivil and structural engineeringceramics and composites ??
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Deposited On:
23 Mar 2023 11:05
Last Modified:
15 Jul 2024 23:40