玻璃钢/复合材料 ›› 2017, Vol. 0 ›› Issue (10): 5-10.

• 基础研究 •    下一篇

双向格构腹板增强泡沫夹层复合材料梁弯曲性能试验

陈继业1,方 海1*,庄 勇2,刘伟庆1   

  1. 1.南京工业大学土木工程学院,南京211816;
    2.中铁大桥勘测设计院集团有限公司,武汉430034
  • 收稿日期:2017-03-30 出版日期:2017-10-20 发布日期:2017-10-20
  • 通讯作者: 方海(1981-),男,博士,副教授,主要从事复合材料结构方面的研究,fanghainjut@163.com。
  • 作者简介:陈继业(1993-),男,博士生,主要从事复合材料结构方面的研究。
  • 基金资助:
    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)

EXPERIMENTAL INVESTIGATION ON FLEXURAL BEHAVIOR OF REINFORCED FOAMSANDWICH BEAMS WITH TWO-WAY LATTICE-WEB

CHEN Ji-ye1, FANG Hai1*, ZHUANG Yong2, LIU Wei-qing1   

  1. 1.College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;
    2.China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan 430034, China
  • Received:2017-03-30 Online:2017-10-20 Published:2017-10-20

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。   

关键词: 格构腹板, 三点弯曲, 十字模型, 抗弯刚度

Abstract: Composite sandwich structure has the characteristics of high specific strength, high specific stiffness, good designability and corrosion resistance etc. Two-way lattice-web reinforced foam core sandwich beams are prepared through vacuum assisted resin infusion, with polyurethane foam as the core, Glass Fiber Reinforced Polymer (GFRP) as the panels and lattice webs. In order to study the failure mode and mechanism, a series of three point bending tests were performed on the common foam sandwich beams and the lattice-web reinforced foam sandwich beams with different web height and web space. Based on the equivalent cross model of foam filled with rectangular honeycomb shape, the bending stiffness and the deflection of the specimens are predicted, and the calculated values agree well with the experimental values.

Key words: lattice-web, three point bending, cross model, bending stiffness

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