Fiber orientation angle

Tensile values at given specimen locations and estimates of localized glass fiber orientation angles 0 are given for each composite material in Tables 12.10 and 12.11. Table 12.10 features characteristics of longitudinal flow in the V direction, whereas Table 12.11 provides analysis of transverse flow in the X direction. 

A major advantage of the dilution principle is that CD profiles of main fiber orientation can be rectified (Fig. 5.36 ). As mentioned before local slice bar adjustment causes cross flow in the nozzle chamber and in the exiting jet. Even a small angle of the jet velocity vector against the machine direction results in a large main fiber orientation angle. The main fiber orientation angle describes the direction of the plurality of the fibers in the paper and can be measured by laser or by ultrasonic devices. It has an impact on other important paper properties. 

Gegauff [3] assumed an ideal arrangement of each fiber, as shown in Figure 10. la, in which the tangent of twist angle 9, that is, fiber orientation angle, is proportional to radius r of the yarn as follows ... 

Figure 10.7 Distribution of fiber orientation angle (helical angle) of single yarn in twisted...

In the following sections, various composite studies carried out using starch-based resins are discussed. First, the effect of alkali treatment of natural fibers on the mechanical properties of fibers and green composites is explained. Next, the potentials and problems of cellulose nanofiber composites are discussed. Finally, fiber orientation angle and mechanical properties are discussed and a way to predict the Young s modulus has been suggested. 

Figure 12.8 Histogram showing the distribution of the measured fiber orientation angles of DM-A and DM-B surfaces [57],...

Figure 12.10 Dependence of Young s modulus on fiber orientation angle [57].

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