Calculation of the expansion coefficients of composites with fibrous fillers

Andreeva, N. G.; Gelfandbein, V.

doi:10.1007/bf00856919

Cited by 3 publications

(2 citation statements)

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“…[11,12] Both analyses result in the same expression for the effective CTE, where the effect of the fiber aspect ratio is introduced through a ''fiber efficiency factor.'' In the study of Maron and Weinberg, [12] the fiber efficiency varies linearly with the fiber length for fibers shorter than the critical fiber length (for load transfer).…”

Section: Introductionmentioning

confidence: 96%

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Thermal expansion of morphologically textured short-fiber composites

Dunn

Ledbetter

1999

Metall Mater Trans A

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We studied, both experimentally and theoretically, the thermoelastic response of short-fiber composites with a preferred orientation of the short fibers, i.e., a morphological texture. Our theoretical efforts are general, being applicable to any composite system with constituents that exhibit linear thermoelastic response. We propose a relatively simple micromechanics model to predict the thermal expansion coefficient (CTE), and give simple, easily used, results for orientation distributions of practical significance. We also present a convenient approach to represent the effects of texture on thermal expansion of short fiber composites, namely, a texture map. Our experimental efforts focus on a series of extruded SiC/Al short-fiber composites that we have fully characterized. This includes measurement of the complete set of elastic constants, the volume fraction, and the fiber orientation distribution function (ODF) using neutron diffraction. We measured the axial and transverse components of the overall CTEs of these composites using a quartz-rod dilatometer. Predictions are in good agreement with measurements.

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Section: Introductionmentioning

confidence: 96%

“…For fibers longer than the critical fiber length, the fiber efficiency varies inversely with the fiber length. Andreeva and Gelfardbein [11] also introduce an adjustable parameter to allow for the effect of misoriented short fibers.…”

Section: Introductionmentioning

confidence: 99%

Thermal expansion of morphologically textured short-fiber composites

Dunn

Ledbetter

1999

Metall Mater Trans A

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Composite‐material mechanics: Properties of planar‐random fiber composites

Bert

Kline

1985

Polymer Composites

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This paper is primarily a literature review of over ten dozen papers on the methodology for predicting elastic stiffnesses, tensile strength, thermal expansion, and thermal conductivity of planar-random fiber composites from the reinforcement geometry and appropriate properties of the constituent materials. Particular attention is devoted to the effects of fiber volume fraction, fiber curvature, fiber length, and fiber orientation, since variations in these properties can be introduced during the manufacturing process. E = 1 Ell(dJ)ddJ (3) Here EI1(c$) is the composite elastic modulus of a Unidirectional composite (of the same fiber volume fraction) as a function of 4, given by -cos2c$ sin2$ + EF1 sin49]-' where E L , ET, GLT, and vLT are the respective longitudinal (L) and transverse (T) elastic moduli, the shear modulus with respect to L, T axes, and the major Poisson's ratio of the unidirectional composite. The work of Nielsen and Chen was extended by Halpin and Pagano ( 5 ) , who presented the following closed-form expressions for all three of the stiffness properties: (5) E = 4(US/U1)(Ul -Us) V = (U, -2Us); c = us POLYMER COMPOSITES, JULY, 1985, Yo/. 6, No. 3 133 F = (2Fs/r)[1 + (FTP~,,) + I~(FTF,,,/F;)]

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Thermal expansion of organic and inorganic matrix composites: A Review of theoretical and experimental studies

Raghava

1988

Polymer Composites

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This paper reviews theoretical and experimental studies conducted in organic, ceramic, and metal matrix composites containing cylindrical, lamellar, and spheroidal inclusions as reinforcements. Mathematical formulations proposed to predict thermal expansion coefficients of fiber, disc, and sphere reinforced organic and inorganic matrix composites have been reviewed. Experimental studies undertaken to confirm theoretical predictions of thermal expansion coefficients of a variety of reinforcement geometry composites have also been discussed.

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Calculation of the expansion coefficients of composites with fibrous fillers

Cited by 3 publications

References 1 publication

Thermal expansion of morphologically textured short-fiber composites

Thermal expansion of morphologically textured short-fiber composites

Composite‐material mechanics: Properties of planar‐random fiber composites

Thermal expansion of organic and inorganic matrix composites: A Review of theoretical and experimental studies

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