VARTM MOLDING AND IMPACT PROPERTIES OF LAMINATES BASED ON BI-AXIAL WARP-KNITTING FABRICS

Abstract

Abstract: Multi-axial Warpknitting Fabrics (MWK) have been widely used in energy, transportation, vehicle, sports, equipment and other fields due to its great advantages in term of cost and performance. Based on bi-axial (45/-45) MWKs, two kinds of laminates, [(45/-45)/(0/90)]_2s (Layup-1) and [(60/-30)(-60/30)(0/90)]_s (Layup-2), with various layup angles and thicknesses were prepared by using of vacuum assisted resin transfer molding (VARTM). The molding quality, fiber volume fraction, impact and compressive strength after impact of the obtained laminates were measured and evaluated. The results have shown that laminates with uniform quality and 54.2 vol% can be obtained by reasonably controlling the process. The layup-1 possesses larger capacity of anti-impact and compression. While, the layup-2 has larger ability to resist impact deformation and can absorb more impact energy during the impact process. Also, the layup-2 laminate shows significant stage of damage initiation and accumulation, but it′s compressive strength after impact is relatively lower than that of the layup-1.

Key words: warp-knitting fabrics, VARTM, impact, compression

CLC Number:

TB332

WANG Wei, LIU Ling. VARTM MOLDING AND IMPACT PROPERTIES OF LAMINATES BASED ON BI-AXIAL WARP-KNITTING FABRICS[J]. Fiber Reinforced Plastics/Composites, 2019, 0(2): 39-44.

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