Study on Properties of Interlayer Short Fiber Reinforced Carbon Fiber/Epoxy Composite Laminates

In order to improve the interlaminar delamination resistance of the carbon-fiber/epoxy composite laminates, short fibers were applied between layers. The effects of length, density, type of short fiber on mode I fracture toughness(GIC) and mode II fracture toughness (GIIC) were investigated by three-factor and four-level orthogonal test combined with range analysis and scanning electron microscope observation. Finally, parameter optimization and test verification. The results show that the order of factors influencing GIC and GIIC within the selected parameters are: fiber type, fiber density and fiber length. When Kevlar fibers with a length of 11mm and a density of 20g·m-2 were laid between layers, the GIC was 451.4J·m-2, which was 82.2% higher than that of the specimens without short fibers in the layers. Kevlar fibers with a length of 11 mm and a density of 5g·m-2 were layered with a GIIC of 2034.3 J·m-2, which was increased by 240.5% compared with the specimens without short fibers in the interlayer.

[1]  I. Sinclair,et al.  Crack path simulation in a particle-toughened interlayer within a polymer composite laminate , 2016 .

[2]  X. Zhao,et al.  Improved Mode I fracture resistance of CFRP composites by reinforcing epoxy matrix with recycled short milled carbon fibre , 2016 .

[3]  Z. Aboura,et al.  Experimental investigation of drilling damage and stitching effects on the mechanical behavior of carbon/epoxy composites , 2014 .

[4]  Xiaozhi Hu,et al.  Processing and property of carbon-fiber aluminum-foam sandwich with aramid-fiber composite adhesive joints , 2014 .

[5]  Muchen Li,et al.  Influential Factors of Z-pin Bridging Force , 2014, Applied Composite Materials.

[6]  Dai Gil Lee,et al.  Surface modification of carbon fiber/epoxy composites with randomly oriented aramid fiber felt for adhesion strength enhancement , 2013 .

[7]  I. Bond,et al.  Mode II interfacial toughening through discontinuous interleaves for damage suppression and control , 2012 .

[8]  B. Ashrafi,et al.  Enhancement of mechanical performance of epoxy/carbon fiber laminate composites using single-walled carbon nanotubes , 2011 .

[9]  Adrian P. Mouritz,et al.  Review of z-pinned composite laminates , 2007 .

[10]  Brian N. Cox,et al.  Properties and failure mechanisms of z-pinned laminates in monotonic and cyclic tension , 2006 .

[11]  N. Fleck,et al.  In-plane properties of composite laminates with through-thickness pin reinforcement , 2006 .

[12]  Xiaozhi Hu,et al.  Comparative Study of Dynamic and Static Delamination Behaviour of Carbon Fibre-Epoxy Composite Laminates , 1995 .

[13]  Xiaozhi Hu,et al.  Delamination Behaviour of Carbon Fibre/Epoxy Composite Laminates with Short Fibre Reinforcement , 1994 .

[14]  Xiaozhi Hu,et al.  Mode II delamination toughness of carbon-fibre/epoxy composites with chopped kevlar fibre reinforcement , 1994 .