双向格构腹板增强泡沫夹层复合材料梁弯曲性能试验

发布时间：2018-06-01 19:22

  本文选题：格构腹板 + 三点弯曲　； 参考：《玻璃钢/复合材料》2017年10期

【摘要】：复合材料夹层结构具有比强度高、比刚度高、可设计性强、耐腐蚀等特点,以聚氨酯泡沫为芯材,以玻璃纤维增强复合材料为面板和格构腹板,采用真空导入成型工艺,制备双向格构腹板增强泡沫夹层复合材料梁。对无格构泡沫夹芯复合材料梁,不同腹板高度、腹板间距双向格构增强泡沫夹层复合材料梁进行三点弯曲试验,研究其破坏模式和机理。基于泡沫填充矩形蜂窝芯材的等效十字模型,预估试件的抗弯刚度和挠度,计算值与试验值吻合较好。
[Abstract]:The composite sandwich structure has the characteristics of high specific strength, high specific stiffness, strong designability and corrosion resistance. The polyurethane foam is used as the core material, the glass fiber reinforced composite material as the panel and the lattice web plate, and the vacuum introduction molding process is adopted. Two-way lattice web reinforced foam sandwich composite beams were prepared. The failure mode and mechanism of lattice free foam sandwich composite beams with bidirectional lattice reinforced sandwich composite beams with different web height and web spacing were studied by three point bending test. Based on the equivalent cross model of foam filled rectangular honeycomb core, the bending stiffness and deflection of the specimen are estimated, and the calculated values are in good agreement with the experimental values.
【作者单位】： 南京工业大学土木工程学院;中铁大桥勘测设计院集团有限公司;
【基金】：国家自然科学基金重点项目(51238003);国家自然科学基金面上项目(51578285) 江苏省自然科学基金面上项目(BK20161545)
【分类号】：TB332
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本文编号：1965348