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Tripathi, Devesh; Jones, Frank R.

doi:10.1023/a:1004351606897

Cited by 131 publications

(32 citation statements)

References 57 publications

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“…Typical microscopic damage around a fiber break in SFC includes transverse matrix cracks and/or interfacial debonding between the fiber and matrix initiated from fiber breaks [4] (Fig. 1(a)).…”

Section: Single-fiber Composite Modelmentioning

confidence: 99%

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Determination of interface properties from experiments on the fragmentation process in single-fiber composites

Nishikawa

Okabe

Takeda

2008

Materials Science and Engineering: A

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Section: Single-fiber Composite Modelmentioning

confidence: 99%

“…In particular, the single-fiber composite (SFC) test has been used as a powerful tool to characterize the damage process at the constituent level (i.e. fiber, matrix, and the interface) [1][2][3][4][5][6]. In the SFC, a single-fiber embedded in the matrix suffers multiple fiber breaks (i.e.…”

Section: Introductionmentioning

confidence: 99%

Determination of interface properties from experiments on the fragmentation process in single-fiber composites

Nishikawa

Okabe

Takeda

2008

Materials Science and Engineering: A

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“…By recording the overall strain and load on the fiber at saturation, as well as the number of breaks (current practice) and associated fragment lengths, an approximate calculation for the IFSS is obtained using models derived from the 'fiber' free body diagram shown in Figure 1. The limitations of the various micromechanical models developed to calculate the IFSS have been well documented [12][13][14][15][16][17][18][19][20][21][22]. The equation for calculating the IFSS, ߬ , has the following general form:…”

Section: Introductionmentioning

confidence: 99%

The fiber break evolution process in a 2-D epoxy/glass multi-fiber array

McCarthy

Kim

Heckert

et al. 2015

Composites Science and Technology

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The mechanical integrity of a structural composite is strongly affected by the strength and toughness of the fiber-matrix interface/interphase [1], with interfacial shear strength (IFSS) being generally accepted as the best quantifying metric. The value of the IFSS is not directly measurable, but it can be approximated by several micromechanics based test methods with the value obtained being dependent on the choice of the model. The most popular of these test methods is the embedded single fiber fragmentation test (SFFT) which provides the experimental data needed to estimate the IFSS: (a) mean fragment length at saturation and (b) fiber strength at the critical fragment length.Because the IFSS is used in unidirectional composite models to predict strength and failure behavior, where the interaction between fibers can be important, the validity of extrapolating from test results based upon the repeated failure of a single isolated fiber has often been questioned. In this paper, the spatial distribution of fiber breaks in a 2-D array of glass fibers is compared with break locations observed from SFFT specimens. In both cases, the break locations in each fiber were found to evolve to a uniform distribution, thereby confirming that the ordered fragment lengths from the repeated fracture process conforms for both SFFT and multi-fiber fragmentation test (MFFT) specimens to a cumulative distribution function (CDF) derived by Whitworth [2][3][4][5]. The array break density was also observed to be less than the break density in isolated fibers, and break locations across array fibers were observed to be highly coordinated and mostly aligned.

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“…Stress-strain curves of EOC/short fiber composite as a function of fiber loading and length from matrix to the fiber will build up sufficient tensile stress in the fiber to its tensile strength leading to fiber fracture. Furthermore, the high length fibers may undergo entanglement with each other causing aggregate lumps of fibers which act as stress concentrated points, as a result the stressed composite leads to a low strain failure or brittle failure [26][27][28]. The stress-strain behavior and the corresponding tensile properties such as tensile strength, elongation at break, Young's modulus, low strain modulus (10%) and high strain modulus (100% ) as a function of short fiber length and loading are displayed in Figure 2 and Table 5 respectively.…”

Section: Mechanical Properties Of the Composites (A) Effect Of Short mentioning

confidence: 99%

Exploring a novel multifunctional agent to improve the dispersion of short aramid fiber in polymer matrix

Shibulal¹,

Naskar²

2012

Express Polym. Lett.

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Abstract.Composites based on resorcinol formaldehyde latex (RFL) coated aramid short fiber and a polyolefin based thermoplastic elastomer, namely ethylene octene copolymer (EOC) were prepared by melt mixing technique. The effects of both fiber loading and its length on the mechanical and thermal characteristics of the composite under natural and sheared conditions were investigated. Both the low strain modulus and Young's modulus were increased as a function of fiber loading and length. However, thermal stability of the composite was found to enhance with increase in fiber loading and was independent of fiber length. Due to poor interfacial interaction between the fiber and the matrix and the formation of fiber aggregation especially with 6 mm fiber at high loading, the elongation and toughness of the composite were found to decrease drastically. In order to solve this problem, a maleic anhydride adducted polybutadiene (MA-g-PB) was applied on the aramid fiber. The improvements in tensile strength, elongation at break, toughness to stiffness balance and a good quality of fiber dispersion especially with 6 mm short fiber were achieved. These results indicate the potential use of maleic anhydride adducted PB as a multifunctional interface modifying coupling agent for the aramid short fiber reinforced polymers to enhance the mechanical properties as well as fiber dispersion. FTIR analyses of the treated fiber and SEM analyses of the tensile fractured surfaces of the composite strongly support and explain these results.

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Cited by 131 publications

References 57 publications

Determination of interface properties from experiments on the fragmentation process in single-fiber composites

Determination of interface properties from experiments on the fragmentation process in single-fiber composites

The fiber break evolution process in a 2-D epoxy/glass multi-fiber array

Exploring a novel multifunctional agent to improve the dispersion of short aramid fiber in polymer matrix

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