纺织学报 ›› 2019, Vol. 40 ›› Issue (05): 59-63.doi: 10.13475/j.fzxb.20180403405

• 纺织工程 • 上一篇    下一篇

玻璃纤维/环氧树脂基夹芯材料侧压性能数值模拟

曹海建1(), 陈红霞2, 黄晓梅1   

  1. 1.南通大学 纺织服装学院, 江苏 南通 226019
    2.南通大学 分析测试中心, 江苏 南通 226019
  • 收稿日期:2018-04-16 修回日期:2019-02-15 出版日期:2019-05-15 发布日期:2019-05-21
  • 作者简介:曹海建(1979—),男,副教授,博士。主要研究方向为纤维复合材料的开发与应用。E-mail:caohaijian @ntu.edu.cn。
  • 基金资助:
    国家重点研发计划项目(2018YFC0810300);江苏省“六大人才高峰”高层次人才项目(XCL-061);江苏省高校自然科学研究项目(18KJA430011);江苏省先进纺织工程技术中心开放基金重大项目(XJFZ/2018/02)

Numerical simulation of side compressive properties on glass fiber/epoxy resin sandwich composite

CAO Haijian1(), CHEN Hongxia2, HUANG Xiaomei1   

  1. 1. School of Textile and Clothing, Nantong University, Nantong, Jiangsu 226019, China
    2. Analysis & Testing Center, Nantong University, Nantong, Jiangsu 226019, China
  • Received:2018-04-16 Revised:2019-02-15 Online:2019-05-15 Published:2019-05-21

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摘要：

为分析材料在侧压载荷下的失效机制及破坏模式,采用有限元软件ANSYS,建立了材料的细观结构模型,并进行侧压性能的数值模拟,探讨了材料在3 mm侧压位移载荷作用下复合材料、纤维和树脂基体的应力、应变分布情况。结果表明:玻璃纤维/环氧树脂基夹芯材料在侧压载荷作用下,从宏观角度分析发现,上下面板应力最大,最易发生压缩破坏;芯材应力最小,最不易被破坏;2排芯材间的面板最易发生失稳破坏,这是导致材料失效的最主要原因。从微观角度分析发现,纤维起主要承载作用,树脂起次要作用,当侧压位移载荷达到3 mm时,材料的破坏模式主要为树脂破裂、纤维与树脂严重脱黏等。

关键词: 玻璃纤维/环氧树脂基夹芯材料, 数值模拟, 侧压性能, 失效机制, 破坏模式

Abstract:

In order to reveal failure mechanism and failure mode of glass fiber/epoxy resin sandwich composite under side compressive load, a meso-structural model was built by using the finite element software ANSYS, and numerical simulation of side compressive properties on the composite was analyzed emphasisly. The stress and strain distribution of the composite, fibers and resin was discussed under side compressive loads of 3 mm displacement by using the meso-structural model. The results show that when the composite is subjected to side compressive load, the maximum value of stress occurs on the upper and lower face-sheet macroscopically, where the composite is damaged easily. The minimum value of stress occurs on the piles, where the composite is hard to be damaged. Unstable failure easily occurs on the face-sheet between two rows piles, which is the main failure cause of the composite. The fibers play a major role in bearing, and the resin plays a minor role microscopically. The failure mode is the resin fracture, and the interfacial de-bonding between fibers and resin when the composite is loaded with 3 mm displacement compression.

Key words: glass fiber/epoxy resin sandwich composite, numerical simulation, side compressive properties, failure mechanism, failure mode

中图分类号: 

  • TB332

图1

玻璃纤维/环氧树脂基夹芯材料细观结构模型"

表1

玻璃纤维和树脂基体的刚度常数"

组分 E11/
GPa		 E22/
GPa		 E33/
GPa		 G12/
GPa		 G23/
GPa		 G13/
GPa		 ν12 ν23 ν13
S-玻璃纤维 85 40 40 35 23 35 0.3 0.23 0.3
环氧树脂 3.5 3.5 3.5 1.3 1.3 1.3 0.35 0.35 0.35

表2

玻璃纤维和树脂基体的强度常数"

组分 XT YT ZT XC YC ZC S12 S23 S31
S-玻璃纤维 3 530 1 500 1 500 -5 300 -1 000 -1 000 1 000 800 1 000
环氧树脂 70 70 70 -100 -100 -100 30 30 30

图2

划分网格后的细观模型"

图3

玻璃纤维/环氧树脂基夹芯材料的侧压应力与应变云图"

图4

面板的应力放大云图"

图5

压缩破坏后的玻璃纤维/环氧树脂基夹芯材料"

图6

玻璃纤维/环氧树脂基夹芯材料各组分的应力、应变云图"

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