Single fiber fragmentation

Favre, J.P. and Jacques, D. (1990). Stress transfer by shear in carbon fiber model composites Part I Results of single fiber fragmentation tests with thermosetting resins. J. Mater. Sci. 25, 1373-1380. 

Favre, J.P. and Jacques, D. (1990). Stress transfer by shear in carbon fiber model composites Part I Results of single fiber fragmentation tests with thermosetting resins. J. Mater. Sci. 25, 1373-1380. Favre. J.P., Sigety, P. and Jacques, D. (1991). Stress transfer by shear in carbon fiber model composites. Part 2. Computer simulation of the fragmentation test. J. Mater. Sci. 26, 189-195. 

Ho, H. and Drzal, L.T. (1995b). Non-linear numerical study of the single fiber fragmentation test, part II, Parametric study. Composites Eng. 5, 1245-1259. 

Keywords Interfacial shear strength Lignocellulosic fiber Microlxaid test Polymer composite Pullout test Single fiber fragmentation test... 

Fig. 9.8 Schematic of a single fiber fragmentation test. Reproduced with the kind permission of the publishers of [37]...

Fiber condition Single fibo- pullout (SFP) test Single fiber fragment (SFF) Test ... 

Figure 9. Fragment lengths of raw and lignin treated cotton fibers in a polypropylene matrix determined by the single fiber fragmentation test (standard deviations are given as error bars).

Fig. 7. Schematic representation of the single-fiber fragmentation process.

Verpoest et al. [81] presented a micromechanical analysis to show that for increasing applied strains, the fiber aspect ratio can reach values which are lower than those predicted by Kelly s shear-lag analysis. They also proposed that the single-fiber fragmentation test could be used to estimate the different components of the interface shear strength, that is, the bond strength, the friction strength and the matrix yield strength. 

Fig. 8. Micromechanical model of the single-fiber fragmentation test [88].

Values of interfacial shear strength measured with the single-fiber fragmentation technique was used as a reference to compare the results from the single-fiber techniques. 

The single-fiber fragmentation technique appears to be very sensitive to interphase conditions as reflected by the aspect ratios (critical fiber fragment length... 

Single fiber fragmentation technique Ksi/MPa (IJd) Microindentation technique Ksi/MPa Microbond technique Ksi/MPa... 

In the second half of the 1990s, mainly Park et al. from Korea published several papers on BF-reinforced composites. They tested polycarbonate (PC)" and epoxy resin (EP) based polymer composites with the methods of single fiber fragmentation and acoustic emission. It was found that in the case of PC matrix composite (when aminosilane was used as a treating agent), the number of acoustic events correlated well with the value of the interfacial shear strength determined from the fragmentation tests. 

The single-fiber fragmentation test is often used to determine the interfacial shear strength of fibers embedded in matrix materials. For this test to be valid the matrix materials should have an elongation to break which is at least three times the elongation to break the fiber. This test is especially applicable to fiber-reinforced composites such as carbon/expoy. In the test a single fiber is embedded in the... 

The test method for single fiber fragmentation was first developed by Ongchin et aZ[2] It was used to examine properties of the interface between single glass fiber embedded in polyethylene matrices shaped into dumbbell specimens. Each dumbbell was tested using a tensile testing machine until the fiber broke into several shorter... 

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