Short fibers fiber aspect ratio

Fig. 11.24 The effects of the fiber aspect ratio, at constant 30% wt loading, on glass-filled polyamide-6. [Reprinted by permission from H. M. Latin, Orientation Effects and Rheology of Short Glass Fiber-reinforced Thermoplastics, Colloid Polym. Sci., 267, 257 (1984).]...

Takao, Y. and Taya, M. (1987) The effect of variable fiber aspect ratio on the stiffness and thermal expansion coefficients of a short fiber composite. Journal of Composite Materials, 21, 140-156. 

If the fiber aspect ratio is set to one (i.e., spherical particles), one notes that there is a mathematical singularity in the Eshelby tensor and the Tandon and Weng explicit equations for short fibers cannot be used. However, in such a case, there are some simplifications in the tensor and particularly simple... 

Typical features of the shear lag model effect of fiber aspect ratio on calculated modulus, compared with experimental data material parameters Short Glass Fibers, Egj, = 77.0 GPa, Vgg = 0.20, L = 1 mm D = variable polypropylene, = 1.14 GPa, = 0.43. 

There are three kinds of metal-matrix composites distinguished by type of reinforcement particle-reinforced MMCs, short fiber- or whisker-reinforced MMCs, and continuous fiber- or sheet-reinforced MMCs. Table 1 provides examples of some important reinforcements used in metal-matrix composites as well as their aspect (length/diameter) ratios and diameters. 

Whiskers are short fibers, usually a single crystal with an aspect ratio of 10/1 or greater. They have high strength but are difficult to process. Their applications so far has been limited SiC whiskers are reported as random reinforcement for ceramics and in alumina cutting tools. CVD is a common production method.O Beside SiC, the following whiskers have recently been produced by CVD ... 

The aspect ratio, i.e., the length/diameter ratio (L/D) of the fibers is a major parameter that controls the fiber dispersion, fiber-matrix adhesion and optimum performance of short fiber-mbber... 

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