面板厚度对复合材料夹层梁整体及局部弯曲力学性能影响

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (5): 21-26.

面板厚度对复合材料夹层梁整体及局部弯曲力学性能影响

张富宾, 刘伟庆^*, 齐玉军, 方海

南京工业大学土木工程学院,江苏南京 210009

出版日期:2015-05-28 发布日期:2021-09-13
通讯作者: 刘伟庆(1964-),男,教授,博士生导师,主要从事结构工程振动控制、复合材料结构研究,wqliu@njtech.edu.cn。
作者简介:张富宾(1987-),男,博士生,主要从事复合材料夹层结构基本力学性能研究。
基金资助:
国家自然科学基金重点基金项目(51238003)

THE WHOLE AND LOCAL FLEXURAL PERFORMANCE OF SANDWICH BEAMS WITH DIFFERENT FACE THICKNESS

ZHANG Fu-bin, LIU Wei-qing^*, QI Yu-jun, FANG Hai

College of Civil Engineering, Nanjing Tech University, Nanjing 210009, China

Online:2015-05-28 Published:2021-09-13

摘要/Abstract

摘要： 考虑芯材局部压陷效应,对泡沫夹芯复合材料夹层梁整体及局部弯曲力学性能进行研究。分析了上面板厚度对夹层梁整体及局部弯曲力学性能影响规律。首先,对三种不同厚度上面板夹层梁进行三点弯曲试验,结果表明,夹层梁破坏模式为芯材压陷破坏和芯材剪切破坏;上面板厚度越大,夹层梁极限承载力越大;增大上面板厚度能有效减弱加载点位置芯材局部压陷效应。其次,基于考虑芯材竖向压缩变形的高阶剪切变形理论,对试验梁整体及局部弯曲受力机理进行分析,得到夹层梁上、下面板不同位置挠度及应变的分布规律。最后,对不同试验梁极限承载力进行理论分析,并与试验结果对比。

关键词: 复合材料, 夹层梁, 面板厚度, 弯曲, 局部压陷, 真空导入工艺

Abstract: This paper presents the work on the whole and local flexural performance of sandwich beams with three different face thickness. First, three point bending tests were carried out to explore their flexural behavior. Test results show that, the failure mode of the sandwich beams concluded core indentation failure and core shear failure. Second, high-order theory base on variational principles was proposed to analyze the deflection and the strain distribution of the top and bottom faces at different location. Finally, analysis of failure load of the sandwich beams were conducted and gained good agreement with the experimental results.

Key words: composite, sandwich beam, face thickness, bending, local indentation, VARTM

中图分类号:

TB332

张富宾, 刘伟庆, 齐玉军, 方海. 面板厚度对复合材料夹层梁整体及局部弯曲力学性能影响[J]. 复合材料科学与工程, 2015, 0(5): 21-26.

ZHANG Fu-bin, LIU Wei-qing, QI Yu-jun, FANG Hai. THE WHOLE AND LOCAL FLEXURAL PERFORMANCE OF SANDWICH BEAMS WITH DIFFERENT FACE THICKNESS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(5): 21-26.

参考文献

[1] 叶列平, 冯鹏. FRP在工程结构中的应用与发展[J]. 土木工程学报, 2006, 36(3): 24-36.
[2] 刘伟庆, 方海, 祝露, 等. 船-桥碰撞力理论分析及复合材料防撞系统[J]. 东南大学学报, 2013, 44(5): 1080-1086.
[3] 杜善义. 先进复合材料与航空航天[J]. 复合材料学报, 2007, 24(1): 1-12.
[4] 黄培彦, 周绪平, 赵琛. FRP 片材在土木工程中应用的几个关键力学问题[J]. 华南理工大学学报, 2002, 30(11): 102-105.
[5] 刘小川, 周苏枫, 马君峰, 等. 民机客舱下部吸能结构分析与试验相关性研究[J]. 航空学报, 2012, 33(12): 2202-2210.
[6] 张普, 朱虹, 孟少平, 等. 混杂 FRP-混凝土T形组合梁受弯性能试验研究[J]. 东南大学学报, 2010, 40(3): 548-553.
[7] Steeves C A, Fleck N A. Collapse mechanisms of sandwich beams with composite faces and foam core, loaded in three-point bending[J]. PartⅠ: analytical models and minimum weight design. International Journal of Mechanical Sciences, 2004, (46): 561-583.
[8] Steeves C A, Fleck N A. Collapse mechanisms of sandwich beams with composite faces and foam core, loaded in three-point bending[J]. PartⅡ: experimental investigation and numerical modelling. International Journal of Mechanical Sciences,2004,(46): 585-608.
[9] 方海, 刘伟庆, 万里. 点阵增强型复合材料夹层结构制备与力学性能[J]. 建筑材料学报, 2008, 11(4): 495-499.
[10] 方海, 刘伟庆, 陆伟东. 泡桐木夹层结构材料的力学性能[J]. 南京工业大学学报, 2011, 33(5): 7-12.
[11] 刘润泉, 石勇, 朱锡, 梅志远. 夹层复合材料的弯曲理论分析与计算方法研究[J]. 玻璃钢/复合材料, 2006, (6): 6-9.
[12] 杨杰, 沈惠申. 复合材料层合夹芯板局部变形行为研究[J]. 工程力学, 2002, 19(1): 134-138.
[13] Sokolinsky V S, Shen H B, Vaikhanski L, et al. Experimental and analytical study of nonlinear bending response of sandwich beams[J]. Composite Structures, 2003, (60): 219-229.
[14] Frostig Y S, Thomsen O T, Sheinman I. On the non-linear high-order theory of unidirectional sandwich panels with a transversely flexible core[J]. International Journal of Solids and Structures, 2005, (42): 1443-1463.
[15] GB/T 1456, 夹层结构弯曲性能试验方法[S].