Optical fibers tensile strength

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. 

Large-diameter melt-extruded LCP rods can be used to replace steel wire and as strength members in optical cable applications. This is because LCP rods have abalance of critical properties for these applications, including low density, flexibility, high tensile properties (which protect optical fibers from breakage), very low coefficient of thermal expansion, good chemical resistance, and almost zero water regain [6]. 

The fibers were characterized with respect to their density, specific surface area, pore size distribution, microstructure (SEM), and tensile strength (using a special device to ensure fracture of the filaments and not fracture at the spanning clamps fixing the filaments). One example of supercritically dried filaments is shown in Figure 9.11. The filaments are white, soft and ductile with a diameter of 250 pm and in this respect their optical appearance is not different from the monoliths. It would be interesting to use the method of Cai et al. [28] described above in order to investigate whether transparent filaments can be produced. 

PPTA and ODA/PPTA provide high tensile strength and modulus, coupled with high use temperature and low flammability. The high modulus versions of PPTA provide value in protective apparel, ropes, and fiber optic applications, while the standard versions are used in asbestos replacement and rubber reinforcement markets. Figure 8 shows modulus vs tenacity for a wide variety of fiber products. 

All optical fiber cables have a maximum vertical rise that is a function of the cable s weight and tensile strength (Fig. 9.105). This represents the maximum vertical distance the cable can be installed without intermediate support points. Some guidelines for vertical installations include ... 

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