Abstract:

For solving the easily-cracking and poor-integrated problem of laminated composites, the zigzag 3-D woven spacer fabric with the basalt fiber filaments tows as warp and weft yarns were fabricated on the common loom by reasonable design, which had three different spacer heights. The 3-D woven basalt fiber spacer composites were obtained from epoxy vinyl resin as matrix and 3-D woven basalt fiber spacer fabric as reinforced material by vacuum assisted resin transfer molding process. Then, the three-point bending property of 3-D woven basalt fiber spacer composite was tested by using RGY-5 microcomputer to control electronic universal machine, and the load-displacement curves, absorption energy-displacement histogram and failure model were obtained. Results show that the main bearing direction is the weft of material. The more numbers of organization will have better bending property at the rang of certain heights, the values of the load and absoption energy are bigger with the higher spacer height. The failure model of zigzag shaped 3-D woven spacer composite is that the upper surface of the material is under pressure, the bottom surface is under tension, and the connecting layer is under pressure. Under the bending load, the material are not integrally destructed, but obviously deforms.

Key words: 3-D woven spacer composite, basalt fiber, bending property, vacuum assisted resin transfer molding process