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Advanced technical textile products
Published in T. Matsuo, Textile Progress, 2019
Electric insulation textiles are used for the insulation in several electric devices such as transformer and cables. They are in the form of nonwoven and woven fabrics impregnated in such liquids as varnish, mineral oil, unsaturated polyester resin, epoxy resin, silicone and polyimide resin, etc. As typical fiber material, cellulose, PP, nylon, PET, aramid, glass, etc., are used according to the required level of its thermal resistance. For the highest thermal resistance, glass-woven fabric impregnated by a liquid having high thermal resistance such as silicone, polyimide, polyimide-amide is used. In some cases, glass cloth impregnated in varnish is transformed into fabricated insulation parts [57].
Low Exotherm, Low-Temperature Curing, Epoxy Impregnants
Published in Ralph D. Hermansen, Polymeric Thermosetting Compounds, 2017
Where good thermal conduction or high mechanical strength is required in the encapsulant, there are ways to achieve these properties by making the encapsulant a composite material. For thermal conduction, the encapsulant is often a composite of a dielectric, mineral filler and a polymeric matrix (usually an epoxy). For strength, the use of glass cloth or fiber and a polymeric matrix (usually epoxy) is a suitable solution.
A homogenized finite element analysis of the deformation of multicellular thin-walled epoxy/coir fiber-reinforced aluminum 6063 composite tubes
Published in Mechanics of Advanced Materials and Structures, 2023
Currently, the adoption of Al/CFRP composites is limited to various cutting-edge applications because of the overarching economic and manufacturing concerns. In the light of this, various alternatives of hybridization have been considered which includes, glass fiber reinforced polyester tubes, woven-glass cloth epoxy tubes and natural fibers with a consensus that the lightweight absorption capacities of Al/fiber-reinforced plastics have not been fully exploited [25–27, 30], in view of the comprehensive information on the suitability of natural fibers for such advanced energy absorption applications [31–33]. Therefore, in this study with the philosophical aim of balancing lightweight energy absorption performance with cost, the combination of high plasticity Al alloy with a low density, low-price coir-fiber is evaluated numerically in various multi-cell arrangements to provide a strategic pathway to developing structurally-efficient absorbers for potential automotive applications.
An analysis of the propagation of impact elastic waves in isotropic and anisotropic materials
Published in The Journal of The Textile Institute, 2021
Yajing Miao, Miaojun Dong, Binjie Xin, Dan Yang, Lantian Lin, Shuhua Liu, Chunmin Chen
Under the condition of the same distance, the time when the impact stress wave of the organic glass thick plate reaches the test point is later than that of the glass cloth epoxy resin thick plate. According to Table 1, the propagation speed of the impact stress wave in the glass cloth epoxy resin thick plate is about 1.76 times of that in the organic glass thick plate. This is because the organic glass thick plate is an isotropic material, and the glass cloth epoxy resin thick plate is formed by compounding glass fiber and epoxy resin. The sound velocity of epoxy resin is 2540 m/s, that of organic glass is 2692 m/s, and that of organic glass is about 1.06 times of that of epoxy resin. However, the sound speed of glass fiber is 3980–5640 m/s, which is almost 1.48–2.1 times of the sound speed of organic glass. The existence of glass fiber improves the propagation speed of impact stress wave in the glass cloth epoxy resin thick plate, so the propagation speed of impact stress wave in the glass cloth epoxy resin thick plate is faster than that in the organic glass thick plate.
Experimental study of the effect of microspheres and milled glass in the adhesive on the mechanical adhesion of single lap joints
Published in The Journal of Adhesion, 2017
R. Hunter, J. Möller, A. Vizán, J. Pérez, J. Molina, J. Leyrer
Three layers of a biaxial woven E-glass cloth were used to form the adherends. The fabric used was continuous biaxial fiber [0/90] with a weight of 800 g/m2 (Jushi Group Co., Tongxiang, China). The resin used in the manufacture of all the adherends was BASF A-430 Vinylester (BASF Chile, Santiago, Chile). The vacuum infusion process was employed to make the adherends. The fiber glass content of the adherends was 58%. The procedure used to obtain the fiber glass content of the adherend is described in ASTM D2584-02. The final thickness of the adherend layer was 4 mm. To remove the variability of the adherend layer during the tensile test, a plate was manufactured, from which all SLJ specimens were obtained. The surface roughness of the adherends was obtained using a special fabric (Peel Ply) in the vacuum infusion process. The surface roughness of the specimens was 0.2 mm (Ra). The results of the mechanical test for the adherends were: Young’s modulus 24.4 MPa, ultimate tensile stress 288 MPa, and ultimate strain 0.081 mm/mm with a standard deviation of 6.8%. The specimens were tested in an INSTRON universal testing machine Model 3363 (Instron, Norwood, MA, USA), with a capacity of 50 kN, according to ASTM D638-14. The geometry and dimensions of the SLJ specimens are given in Fig. 2.