Large deflection of foam-filled Y-shape sandwich beams under lateral loading

Zhang, Jianxun; Liu, Ying; Yu, Xiang; Xu, Zhengyi; Lü, Jidong; Wu, Xiwei; Du, Jing; Sun, Hao

doi:10.1080/15376494.2023.2169419

Cited by 6 publications

(1 citation statement)

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“…Foam sandwich composite (FSC) materials, due to their excellent characteristics of lightweight, high specific strength, high specific stiffness, and fatigue resistance, are widely used in fields such as rail transportation, shipping, aerospace, and construction 1 . Common core filling materials include metal foam cores, 2,3 polymer foam core, 4–6 and wood core 7 . Among these, polymer foam core has gained significant attention due to its high specific strength and resistance to corrosion, making it a research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Effects of reactive diluent on processing, structure, and properties of epoxy foams and their sandwich composites

Wang,

Han

et al. 2024

Polymer Engineering & Sci

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Foam sandwich composite (FSC) has recently been widely used in transportation, aerospace, shipping, and construction because of its lightweight, high specific strength, stiffness, and fatigue resistance characteristics. This study aimed to prepare, characterize, and test FSC with different diluent addition amounts. Benzyl glycidyl ester was added to the epoxy foam (EF) as a reactive diluent. Then, the EF was introduced into the three‐dimensional hollow composite (3DHC) by vacuum introduction process to prepare the FSC. Fourier transform infrared spectroscopy and thermogravimetric analysis demonstrated that increased diluent content enhanced SiN bond formation, augmenting thermal stability in resin molecules. The effects of different diluents on the mechanical properties of FSC showed that the mechanical properties of FSC were the best when the diluent content was 5 wt%. Compared with 3DHC, the flat compressive strength, flat tensile strength, and shear strength were increased by 7.2, 6.4, and 2.9 times, respectively.Highlights Diluent improves foaming agent dispersion by lowering resin viscosity. Diluent makes the EP easier to be introduced into 3DHC. FSC demonstrates a 723% increase in flat compression strength.

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