Analytical and experimental methods for a fracture mechanics interpretation of the microbond test including the effects of friction and thermal stresses

Liu, Chun-Hsin; Nairn, John A.

doi:10.1016/s0143-7496(98)00057-8

Cited by 79 publications

(76 citation statements)

References 2 publications

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“…Although the intrinsic interfacial shear strength is hard to measure and it is also compounded with the free-edge stress singularity during fiber push-out or pull-out tests [45], we can use its upper bound, i.e., the matrix shear strength to estimate the average interfacial shear strength. If we take the shear strength of epoxy as 0.97 GPa [46], then the minimum nanofiber length should be between 19-370 nm according to Equation (7). In this investigation, our nanofiber length is around 5-10 mm.…”

Section: Matrixmentioning

confidence: 85%

“…In reality, the actual interfacial shear strength is far below the matrix shear strength. For example, if we use the average interfacial shear strength of 37 MPa for the same epoxy Epon 828 but E-glass fiber interface [46], the minimum nanofiber length should be 0.5-10 mm. From this simple analysis, we can see that the product of the tensile strength of nanoscale reinforcement and its diameter (or smallest dimension) is an important material design parameter.…”

Section: Matrixmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Property Characterization of a Polymeric Nanocomposite Reinforced by Graphitic Nanofibers with Reactive Linkers

Bhamidipati

Zhong³

et al. 2004

Journal of Composite Materials

111

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Mechanical property characterization including bending, tensile, and fracture properties for a new functionalized nanofiber/epoxy composite were conducted. Results show that there was only very little increase in mechanical properties of nanocomposites although we used GCNF-ODA reactive linkers to improve the interface. The interfacial stress level of nanocomposites should be much higher than that of traditional composites because of high property mismatch between the nanoscale reinforcement and the matrix. In order to design strong and stiff nanocomposite materials, one should use aligned nanofibers with a relatively large volume or weight fraction. Also, the length of the nanofiber should be long enough and its diameter not very small in order to facilitate the interfacial load transfer mechanism.

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Section: Matrixmentioning

confidence: 85%

Section: Matrixmentioning

confidence: 99%

Mechanical Property Characterization of a Polymeric Nanocomposite Reinforced by Graphitic Nanofibers with Reactive Linkers

Bhamidipati

Zhong³

et al. 2004

Journal of Composite Materials

111

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show abstract

“…Therefore the knowledge of the fiber/matrix adhesion is essential for the calculation of mechanical properties of composites during the design phase [1][2][3][4][5]. The interfacial shear strength as a characteristic of adhesion can be determined by different micromechanical (or single fiber) tests among which the microdebond method is usually preferred [6][7][8][9][10][11]. The cylinder test, developed by us (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Investigation of fiber/matrix adhesion: test speed and specimen shape effects in the cylinder test

2013

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Abstract:The cylinder test, developed from the microdroplet test, was adapted to assess the interfacial adhesion strength between fiber and matrix. The sensitivity of cylinder test to pullout speed and specimen geometry was measured. It was established that the effect of test speed can be described as a superposition of two opposite, simultaneous effects which have been modeled mathematically by fitting two parameter Weibull curves on the measured datas.Effects of the cylinder size and its geometrical relation on the measured strength values have been analyzed by finite element method. It was concluded that the geometry has a direct influence on the stress formation. Based on the results achieved, recommendations were given on how to perform the novel single fiber cylinder test.

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“…Schuller (1) and Lin (2) have studied the cohesive strength of the interface of a single fiber and a matrix by a single fiber pullout test. The single fiber pullout test can be easily performed when the fiber diameter is rather big.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Debonding along Interface of Bundled Fibers and Matrix

Gunawan

Homma

Savetlana

2008

JMMP

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In this paper, the debonding initiation and propagation in the bundled fibers-matrix composite is studied by utilizing a finite element method, which incorporates the bilinear cohesize zone model. The cohesive zone model parameters are adjusted so that the mechanical response of the model fits to that obtained in an experiment. Furthermore, the model performance is verified against three additional experimental datasets. The study reveals that for this particular specimen and loading condition, the interface debonding stably propagates until the applied load reaches its maximum. After the maximum applied load, the debonding propagates rapidly, and finally, the bundled fibers breaks completely.

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Analytical and experimental methods for a fracture mechanics interpretation of the microbond test including the effects of friction and thermal stresses

Cited by 79 publications

References 2 publications

Mechanical Property Characterization of a Polymeric Nanocomposite Reinforced by Graphitic Nanofibers with Reactive Linkers

Mechanical Property Characterization of a Polymeric Nanocomposite Reinforced by Graphitic Nanofibers with Reactive Linkers

Investigation of fiber/matrix adhesion: test speed and specimen shape effects in the cylinder test

An Analysis of Debonding along Interface of Bundled Fibers and Matrix

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