| 齿板-玻璃纤维/聚氨酯泡沫芯夹层梁的低速冲击性能 |
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| 引用本文： | 谢红磊,万里,刘伟庆,裴海平,王璐. 齿板-玻璃纤维/聚氨酯泡沫芯夹层梁的低速冲击性能[J]. 复合材料学报, 2019, 36(5): 1092-1100. DOI: 10.13801/j.cnki.fhclxb.20180612.001 |
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| 作者姓名： | 谢红磊 万里 刘伟庆 裴海平 王璐 |
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| 作者单位： | 南京工业大学 土木工程学院, 南京 210000 |
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| 基金项目： | 国家自然科学基金青年基金(51208251);国家自然科学基金重点项目(51238003);江苏省高校自然科学基金重大项目(15KJA580002) |
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| 摘 要： | 提出了一种由齿板-玻璃纤维（TP-GF）混合面板和聚氨酯（PU）泡沫芯材组成的新型TP-GF/PU泡沫夹层梁，结构中金属板通过齿钉压入GF与内部芯材连接，该夹层梁采用真空导入模压工艺制作。通过低速冲击试验，研究了不同冲击能量、纤维厚度和泡沫密度下TP-GF/PU泡沫夹层梁的冲击响应和损伤模式，并与普通的夹层梁进行了对比分析；通过双悬臂梁试验研究了混合夹层梁的界面性能，计算了夹层梁的应变能释放率。结果表明:在22 J、33 J、44 J能量冲击下，泡沫芯材密度为150 kg/m3的TP-GF/PU泡沫夹层梁的最大接触力较普通夹层梁分别提高了31.2%、48.6%、33.3%，冲击能量吸收分别增加了17.2%、11.3%、15.5%；随着冲击能量、面板纤维层数及芯材密度的增加，TP-GF/PU泡沫夹层梁最大接触力增大，密度较低的TP-GF/PU泡沫夹层梁损伤形式主要为面板的局部弯曲，而芯材密度较高的TP-GF/PU泡沫夹层梁则以穿透损伤为主；增加泡沫芯材密度和面板纤维厚度能够提高TP-GF/PU泡沫夹层梁的抗冲击性能，随着芯材密度的增大TP-GF/PU泡沫夹层梁的应变能释放率峰值越高，界面性能越好。
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| 关 键 词： | 低速冲击 混合夹层梁 接触力 泡沫密度 界面性能 |
| 收稿时间： | 2018-04-08 |
Low-velocity impact behavior of tooth plate glass fiber/polyurethane foam core sandwich beams |
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| XIE Honglei,WAN Li,LIU Weiqing,PEI Haiping,WANG Lu. Low-velocity impact behavior of tooth plate glass fiber/polyurethane foam core sandwich beams[J]. Acta Materiae Compositae Sinica, 2019, 36(5): 1092-1100. DOI: 10.13801/j.cnki.fhclxb.20180612.001 |
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| Authors: | XIE Honglei WAN Li LIU Weiqing PEI Haiping WANG Lu |
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| Affiliation: | Civil Engineering College, Nanjing Tech University, Nanjing 210000, China |
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| Abstract: | A new family of tooth plate-glass fiber/polyurethane (TP-GF/PU) foam core sandwich beams consisted of TP-GF facesheets and a PU foam core were studied, in which tooth plates were connected with foam core through tooth nails. TP-GF/PU foam core sandwich beams were fabricated by a vacuum-assisted resin infusion process. The aim of this article is to investigate the impact response and impact damage of TP-GF/PU foam core sandwich beams with various foam densities and fiber thickness under low velocity impact tests. Double cantilever tests were also conducted to investigate the interfacial properties of TP-GF/PU foam core sandwich beams. An analytical model was used to calculate the strain energy release rate of TP-GF/PU foam core sandwich beams. The test results show that, under the energy impact of 22 J, 33 J and 44 J, the maximum contact force of the sandwich beam with a density of 150 kg/m3 is 31.2%, 48.6% and 33.3% higher than that of the ordinary sandwich beams, respectively. The absorbed energy is 17.2%, 11.3%, 15.5% higher than that of the ordinary sandwich beams, respectively. The maximum contact force increased with the increase of foam core density and impact energy. The main damage modes for TP-GF/PU with low foam density are face sheet bending. The strain energy release rate of TP-GF/PU specimen increase with the increase of the foam density. |
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| Keywords: | low-velocity impact hybrid sandwich beams contact force foam density interfacial properties |
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