Micromechanical Model of Stress Distribution and Transfer in Short-Fiber-Reinforced Elastomer Matrix Composite

Zhu, Dasheng; Bo-qin, GU; Wang, Hongzhi

doi:10.1166/jctn.2008.821

Cited by 8 publications

(1 citation statement)

References 2 publications

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“…In addition, control of separation and orientation is critical to achieve better molding product. [1][2][3][4][5][6][7][8][9] The ways to measure fiber orientation are intersection counting method and intensity method. The former is applied when each fiber is identifiable, and meanwhile the latter is available to where each fiber is not discernable.…”

Section: Introductionmentioning

confidence: 99%

Study on the Measurement of Fiber Orientation During Press Molding of Long Fiber-Reinforced Thermoplastic Composites Using Counting Method

Lee¹,

Kim²

2015

j comput theor nanosci

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For the object with oriented fiber mat, which is difficult to identify, image processing with soft X-ray based on pixel gradation is used to calculate the orientation angle. During the estimation of oriented fiber, intensity method from pixel intensity is adopted. To verify its confidence level, counting method for single fiber count on orientation is proposed. According to this study, average gradient of fiber orientation angle is 0.94 for intensity method, and 0.98 for counting method. Accuracy of the latter is higher than the former by about 4%. During press molding, fiber orientation function (J), which depicts the state of fiber orientation for long fiber is not affected by fiber content, compression speed, and molding temperature. However, compression molding shows the higher fiber orientation function (J) along with compression ratio, and fiber orientation is anisotropic.

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Section: Introductionmentioning

confidence: 99%

Study on the Measurement of Fiber Orientation During Press Molding of Long Fiber-Reinforced Thermoplastic Composites Using Counting Method

Lee¹,

Kim²

2015

j comput theor nanosci

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Mechanical properties and reinforcement mechanisms of hydrogenated acrylonitrile butadiene rubber composites containing fibrillar silicate nanofibers and short aramid microfibers

Tian

Cai

et al. 2010

J of Applied Polymer Sci

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Short-fiber-reinforced rubber composites (SFRCs) with hydrogenated acrylonitrile butadiene rubber (HNBR) as the matrix and fibrillar silicate (FS) nanofibers and short aramid microfibers (DCAFs) as the fillers were developed, and their tensile properties, compression moduli, and mechanical anisotropies were investigated. The results indicated that the properties of the HNBR/DCAF/ FS composites were determined by the loadings of the FS nanofibers and DCAF microfibers. A small amount of the microfibers combined with an appropriate amount of the nanofibers resulted in synergetic reinforcement and imparted to the SFRCs significantly improved mechanical properties without substantially compromising the rubbery characteristics.

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Effects of short fiber tip geometry and inhomogeneous interphase on the stress distribution of rubber matrix sealing composites

Zhang

2014

J of Applied Polymer Sci

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The normal and interfacial shear stress distributions with flat fiber tip of short-fiber-reinforced rubber matrix sealing composites (SFRC) compared with the shear lag model were investigated by using the finite element method (FEM). The results indicate that stress values do not agree with those calculated by the shear lag model. The effect of different geometrical shapes of fiber tip on the stress distributions of SFRC was also investigated. The geometrical shapes of fiber tip under present investigation are flat, semi-elliptical, hemispherical, and circular cone, respectively. The results show that the hemispherical fiber tip transfers the load with less stress concentration and is contributed to controlling the interface debonding failure more effectively than other shapes of fiber tip. Further study on the effect of the inhomogeneous interphase properties on the normal and interfacial shear stresses of hemispherical fiber tip was also conducted. The results indicate that the normal stress increases with the increase of the interphase thickness and interfacial shear stress remains unchanged, and the normal stress values of SFRC with interphase are higher than those without interphase. The interphase elastic modulus has no influence on the stress distributions along the direction to the fiber axis. The stress distributions along the radial direction in the interphase end are largely dependent on the interphase elastic modulus, and the interfacial shear stress is larger than the normal stress, which reveals that a significant part of the external load is transferred from the fiber to the matrix through shear stresses within the interphase.

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Micromechanical Model of Stress Distribution and Transfer in Short-Fiber-Reinforced Elastomer Matrix Composite

Cited by 8 publications

References 2 publications

Study on the Measurement of Fiber Orientation During Press Molding of Long Fiber-Reinforced Thermoplastic Composites Using Counting Method

Study on the Measurement of Fiber Orientation During Press Molding of Long Fiber-Reinforced Thermoplastic Composites Using Counting Method

Mechanical properties and reinforcement mechanisms of hydrogenated acrylonitrile butadiene rubber composites containing fibrillar silicate nanofibers and short aramid microfibers

Effects of short fiber tip geometry and inhomogeneous interphase on the stress distribution of rubber matrix sealing composites

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