Properties of fibers Tensile

Kelly, A. and Tyson, W. R., Tensile properties of fiber reinforced metals copper tungsten and copper/molybdenum,. /. Mech. Phys. Solids, 13, 329 (1965). 

ASTM D 3039 (1982). Test method for tensile properties of fiber-resin composites. 

Figure 5.133 Comparison of tensile properties of fiber-reinforced bone cement (PMMA) and human compact bone. Reprinted, by permission, from Concise Encyclopedia of Composite Materials, A. Kelly, ed., p. 270, revised edition. Copyright 1994 by Elsevier Science Publishers, Ltd.

In the case of defatted jute, rise of temperature from 30 C to 50 C reduces % increase of stiffness linearly from about 11% to 2%. In other words, higher temperature has been found to favor lesser increases in stiffness. For KPM rayon increase of tem-perature from 30 C to 40 C decreases % increase of stiffness substantially from about 17% to 1% but as the temperature is raised from 40 C to 50 C increase of stiffness is not so prominent. Opposite results have been obtained for bleached jute where a decrease of stiffness was observed when grafting was carried out at a temperature of 30, 40 50 C. A maximum of about 5% decrease in stiffness has been observed for grafted bleached jute. The overall effect of grafting on the tensile properties of fiber was found to be rather obscure to propose any definite mechanism. 

D. A. Jablonski and R. B. Bhatt, High-temperature Tensile Properties of Fiber-Reinforced Reaction Bonded Silicon Nitride, J. Comp. Tech. Res., 12[3], 139-146 (1990). 

Standard Test Method for Tensile Properties of Fiber-Resin Composites Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials... 

Tensile Properties. Tensile properties of nylon-6 and nylon-6,6 yams shown in Table 1 are a function of polymer molecular weight, fiber spinning speed, quenching rate, and draw ratio. The degree of crystallinity and crystal and amorphous orientation obtained by modifying elements of the melt-spinning process have been related to the tenacity of nylon fiber (23,27). 

Stress—Strain Curve. Other than the necessity for adequate tensile strength to allow processibiUty and adequate finished fabric strength, the performance characteristics of many textile items are governed by properties of fibers measured at relatively low strains (up to 5% extension) and by the change ia these properties as a function of varyiag environmental conditions (48). Thus, the whole stress—strain behavior of fibers from 2ero to ultimate extension should be studied, and various parameters should be selected to identify characteristics that can be related to performance. 

Table 9. Tensile properties of PPS composites. All the fiber fractions are in weight percents. Data on Specimens a and b arc taken from. Modem Plastic Encyclopedia 96, Mid-Nov 1995 Issue.

Table 4 also reports dependence of the mechanical tensile properties of the samples on the processing conditions. The highest tensile properties of sample 1, injection molded with a lower melt temperature and a lower volume flux, are attributed to the highest degree of fibrillation of the TLCP fibers, as shown in Fig. 12, by so-called in situ reinforcement. 

Table 5 compares the tensile properties of Vectra A950 in the form of dispersed fibers and droplets in the matrix by injection molding, microfibril by extrusion and drawing [28], injection molded pure thick sample and pure thin sample, and the pure drawn strand [28]. As exhibited, our calculated fiber modulus with its average of 24 GPa is much higher than that of the thick and thin pure TLCP samples injection molded. It can be explained that in cases of pure TLCP samples the material may only be fibrillated in a very thin skin layer owing to the excellent flow behavior in comparison with that in the blends. However, this modulus value is lower than that of the extruded and drawn pure strand. This can be... 

Table 5 Tensile Properties of Vectra A950 as Fibers and as Pure Bulk Materials...

Fu SY, Lauke B, Mader E, Yue CY, Hu X. Tensile properties of short-glass-fiber- and short-carbon-fiber-reinforced polypropylene composites. Composites Part A Applied Science and Manufacturing. 2000 31(10) 1117-25. 

Conversion of copolymers to fibers and pertinent tensile date. Copolymers I-III described in Table I were melt extruded, and the extrudates were oriented by drawing and then annealed. The tensile properties of the unannealed and annealed fibers are summarized in Table II and III, respectively. 

EFFECT OF DRAWING SCHEMES ON TENSILE PROPERTIES OF MONOFILAMENT FIBERS... 

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