Flexural test and theoretical analysis of multi cavity pultruded profile sandwich composite panel

doi:10.19936/j.cnki.2096-8000.20260828.002

Abstract

Abstract: This paper presents a novel multi-cavity pultruded profile sandwich composite panel with a pultruded profile core and fiber-reinforced web panels and webs. The bending performance of the multi-cavity pultruded profile sandwich composite panel was investigated using four-point bending tests. The test results showed that the multi-cavity pultruded profile sandwich composite panels exhibitedcore shear and panel compression damage. The ultimate load-carrying capacity increases with the increase of the number of fiber layers, and the increase of the core fiber layer can improve the maximum ultimate load carrying capacity of 20.32%, and the increase of the overall panel fiber layer can improve the maximum ultimate load carrying capacity of 28.04%. Increasing the aspect ratio of pultruded profile sandwich composite panels increases the ultimate load carrying capacity by a maximum of 40.46%. The ultimate bearing capacity of multi-cavity pultruded profile sandwich composite panel is 204.90% of that of foam sandwich composite panel, and the specific strength and specific stiffness are also higher than those of foam sandwich composite panel. In addition, the theoretical equivalent flexural stiffness values of the pultruded profile sandwich composite panels were calculated using the classical sandwich theory, which were in good agreement with the test results.

Key words: pultruded profiles, bending performance, fiber-reinforced composites

CLC Number:

TB332

HAN Juan, CHEN Chen, FANG Hai. Flexural test and theoretical analysis of multi cavity pultruded profile sandwich composite panel[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(8): 11-18.

References

[1] 李彪, 赵娜, 赵进阶, 等. 碳纤维复合材料板拉伸性能影响因素试验研究[J]. 工业建筑, 2023, 53(10): 164-168.
Li Biao, Zhao Na, Zhao Jinjie, et al. Experimental research on influencing factors of tensile properties of CFRP plates[J]. Industrial Construction, 2023, 53(10): 164-168.
[2] 索善泽, 李荣. 海水浸泡和紫外辐照环境下玻璃纤维增强复合材料缠绕管长期性能试验研究[J]. 工业建筑, 2023, 53(7): 223-230.
Suo Shanze, Li Rong. Experimental research on long-term performances of GFRP-wound pipes in environments of seawater immersion and UV radiation[J]. Industrial Construction, 2023, 53(7): 223-230.
[3] 曹银龙, 于桢琪, 冯鹏, 等. 纤维增强环氧/乙烯基树脂复合材料性能优化与劣化机制研究进展[J]. 复合材料学报, 2024, 41(3): 1179-1191.
Cao Yinlong, Yu Zhenqi, Feng Peng, et al. Performance optimization and deterioration mechanism of fiber reinforced epoxy/vinyl resin composite materials: a review[J]. Acta Materiae Compositae Sinica, 2024, 41(3): 1179-1191.
[4] 冯鹏, 叶列平. 外部纤维缠绕增强FRP桥面板受力性能试验研究[J]. 土木工程学报, 2009, 42(9): 61-67.
Feng Peng, Ye Lieping. Experimental study on exterior filament-wound strengthening fiber-reinforced polymer bridge decks[J]. China Civil Engineering Journal, 2009, 42(9): 61-67.
[5] Cassity P, Richards D, Gillespie J. Compositely acting FRP deck and girder system[J]. Structural Engineering International, 2002, 12(2): 71-75.
[6] Romanoff J, Varsta P. Bending response of web-core sandwich beams[J]. Composite Structures, 2006, 73(4): 478-487.
[7] 施冬, 刘伟庆, 齐玉军. 新型轻木-GFRP夹芯板拉挤成型工艺及其界面性能[J]. 复合材料学报, 2014, 31(6): 1428-1435.
Shi Dong, Liu Weiqing, Qi Yujun. Pultrusion process and interface performance of new light wood-GFRP sandwich panels[J]. ActaMateriae Compositae Sinica, 2014, 31(6): 1428-1435.
[8] Wang Lu, Liu Weiqing, Fang Hai, et al. Behavior of sandwich wall panels with GFRP face sheets and a foam-GFRP web core loaded under four-point bending[J]. Journal of Composite Materials, 2015, 49(22): 2765-2778.
[9] Xie Honglei, Shen Chunyan, Fang Hai, et al. Flexural property evaluation of web reinforced GFRP-PET foam sandwich panel: experimental study and numerical simulation[J]. Composites Part B: Engineering, 2022, 234: 109725.
[10] ASTM D3039/D3039M-17 Standard test method for tensile properties of polymer matrix composite materials[S].
[11] ASTM D3518/D3518M-18Standard test method for in-plane shear response of polymer matrix composite materials by tensile test of a ±45° laminate[S].
[12] ASTM D3410/D3410M-16e1 Standardtest method for compressive properties of polymer matrix composite materials with unsupported gage section by shear loading[S].
[13] ASTM C297/C297M-16Standard test method for flatwise tensile strength of sandwich constructions[S].
[14] ASTM C273/C273M-20Standard test method for shear properties of sandwich core materials[S].
[15] ASTM C365/C365M-22Standard test method for flatwise compressive properties of sandwich cores[S].
[16] ASTM C393-00 Standard test method for flexural properties of sandwich constructions[S].
[17] Zhang Zhong, Sun Ying, Cao Xiaojian, et al. A slice model for thermoelastic analysis of porous functionally graded material sandwich beams with temperature-dependent material properties[J]. Thin-Walled Structures, 2024, 198: 111700.
[18] Zhang Zhong, Sun Ying, Zhou Ding, et al. Nonlinear transient heat transfer analysis of multilayered thermal protection systems by incremental differential quadrature element method[J]. Case Studies in Thermal Engineering, 2023, 52: 103730.
[19] Allen H G. Analysis and design of structural sandwich panels[M]. London: Pergamon Press, 1969.