Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 59-63.doi: 10.13475/j.fzxb.20180403405

• Textile Engineering • Previous Articles     Next Articles

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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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

CLC Number: 

  • TB332

Fig.1

Meso-structural model of glass fiber/epoxy resin sandwich composite. (a) Warp yarn;(b) Binder warp yarn;(c) Weft yarn;(d) Epoxy resin;(e) Composite"

Tab.1

Stiffness constant of glass fiber and resin"

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

Tab.2

Stress constant of glass fiber and resinMPa"

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

Fig.2

Meso-structural model of glass fiber/epoxy resin sandwich composites after meshing"

Fig.3

Cloud pictures of side compressive stress distribution (a) and strain distribution (b) on glass fiber/epoxy resin sandwich composites"

Fig.4

Magnified cloud pictures of stress on face-sheet"

Fig.5

Glass fiber/epoxy resin sandwich composites after compression failure. (a) Integral failure appearance (b) Partial failure appearance on face-sheet"

Fig.6

Components stress and strain cloud pictures of glass fiber/epoxy resin sandwich composites. (a) Stress cloud pictures of warp yarn; (b) Strain cloud pictures of warp yarn; (c) Stress cloud pictures of binder warp yarn; (d) Strain cloud pictures of binder warp yarn;(e) Stress cloud pictures of resin; (f) Strain cloud pictures of resin;(g) Stress cloud pictures of weft yarn; (h) Strain cloud pictures of weft yarn"

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