Epoxy/woven reinforcement

Epoxy/woven reinforcement flammability/electrical properties ... 

Bogdanovich AE, Karahan M, Lomov SV, Verpoest I. Quasi-static tensile behavior and progressive damage in carbon/epoxy composite reinforced with 3D non-crimp orthogonal woven fabric. Mech Mater 2013 62 14-31. 

Karahan, M., Lomov, S.V., Bogdanovich, A.E., Verpoest, I., 2011. Fatigue tensDe behavior of carbon/epoxy composite reinforced with non-crimp 3D orthogonal woven fabric. Compos. Sci. Technol. 71, 1961-1972. 

Materials with highly cross-linked epoxy resin reinforced with woven fiber glass are the most common in use. Bromine is reacted with the epoxy matrix and is used to provide fire retar-dancy. Most epoxy-based materials satisfy the Underwriters Laboratories (UL) classification of V-0 for fire retardancy. The generic term for this family of epoxy resin materials is FR-4, with FR standing for flame retardant and 4 an assigned number indicating epoxy. Epoxyfiberglass materials are sold by many snpphers and have become a commodity material. 

Glass pipe can be furnished with an epoxy-resin coating reinforced with woven glass fiber to protect it from abuse. Equipped with special ball couphngs, this may be used for 1-MPa (150-lbf/in ) pressure. 

Fiber-Matrix Composites. As shown in Figure 1.75, there are two main classifications of FMCs those with continuous fiber reinforcement and those with discontinuous fiber reinforcement. Continuous-flber-reinforced composites are made from fiber rovings (bundles of twisted filaments) that have been woven into two-dimensional sheets resembling a cloth fabric. These sheets can be cut and formed to a desired shape, or preform, that is then incorporated into a composite matrix, typically a thermosetting resin such as epoxy. Metallic, ceramic, and polymeric fibers of specific compositions can all be produced in continuous fashions, and the properties of the... 

Reinforcement of epoxy, polyester, and other resins for use in aerospace, marine, automotive and sports industries. We have previously mentioned the vibration damping capacity of Kevlar aramid fiber. Layers of woven Kevlar are used in skis for damping purposes and, of course, to reduce the weight. Kevlar is used as a protective sheath in fiber optic wave guides and to reinforce optical fiber cables because of its high tensile modulus and strength, and low electrical conductivity. 

The results described in this paper were all obtained from tests on E-glass reinforced composite materials produced by hand lay-up. This is the manufacturing route most frequently used for marine structures. For the majority of the tests reported here the E-glass fibres were either quasi-unidirectional (250 g/m with 1 g/m of polyester fibres bonded in the 90° direction to keep the UD fibres in place) or stitched quadrlaxial (0/45/907-45° 1034 g/m ) cloths. The same uniaxial ply is used in both cloths. The resin is based on DGEBA epoxy (SRI500) with an amine hardener (2505) from Sicomin, France. All epoxy specimens were post-cured at 90°C for 6 hours. Some results are also shown for a woven glass (0/90° 500 g/m ) reinforced isophthalic polyester for comparison, as this is the traditional marine... 

A comparison between unidirectionally reinforced and plain-weave CFRP epoxy laminates (IM7/8552) for quasi-static mode I, mode II and mixed mode I/H [83] found similar initiation values, but for the woven CFRPs significantly higher propagation values of delamination resistance were observed. 

Yazid YM, Cantwell WJ, Langdon GS, Nurick GN. The blast resistance of a woven carbon fiber-reinforced epoxy composite. J Compos Mater 2011 45 789-801. http // dx.doi.org/10.1177/0021998310376103. 

---