Inorganic particle toughening II: toughening mechanisms of glass bead filled epoxies

Lee, J; Yee, Albert F.

doi:10.1016/s0032-3861(00)00398-0

Cited by 131 publications

(78 citation statements)

References 46 publications

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“…Much higher debonding probability will be found near the crack surface, where the stresses and strains are higher. This effect was observed and described by Lee and Yee [3,4]. The dissipation processes are shown in Figure 3.…”

Section: Introductionsupporting

confidence: 75%

“…Interfacial debonding determines the initiation and development of the damage process. For glass bead filled epoxies, Lee and Yee [3,4] observed that microcracking is mainly caused by debonding. However, it was observed that it is limited to a region near the fracture surface and does not occur in a large dissipation zone around the propagating crack.…”

Section: Introductionmentioning

confidence: 99%

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Fracture toughness modelling of polymers filled with inhomogeneously distributed rigid spherical particles

Lauke¹

2017

Express Polym. Lett.

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Abstract.Filler particles are not homogeneously distributed in real composites consisting of polymer matrices and rigid spherical particles. In the presence of a crack, high multiaxial stresses develop in the material which are a function of the distance from the crack tip. This variation effects the stress concentration in the periphery of the inhomogeneously distributed particles. For a certain stress level closer particles are able to debond from the matrix while particle pairs with larger centre to centre distances may still be bonded to the matrix. Based on a two particle model, the debonding and matrix yielding energies were calculated. Subsequent integration over the local composite deformation results in the fracture toughness of such composites. Randomly distributed particles provide a lower fracture toughness in modelling as compared to inhomogeneoulsy distributed particles in the composite.

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Section: Introductionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Fracture toughness modelling of polymers filled with inhomogeneously distributed rigid spherical particles

Lauke¹

2017

Express Polym. Lett.

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show abstract

“…Interfacial debonding determines the initiation and development of the damage process. For glass bead filled epoxies Lee and Yee [2], [3] observed that micro cracking is mainly caused by debonding. However, it was observed that it is limited to a region near the fracture surface and does not occur in a large dissipation zone around the propagating crack.…”

Section: Introductionmentioning

confidence: 99%

On the effect of particle size on fracture toughness of polymer composites

Lauke

2008

Composites Science and Technology

104

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Fracture toughness of particle reinforced polymers is strongly affected by the size of particles. It can be improved or reduced depending on the materials used and the volume fractions at which the values are compared. Dissipation mechanisms, as particle debonding and subsequent yielding of the polymer, are responsible for the characteristic behaviour. If the debonding energy per volume is considered it can be concluded that smaller particles are favourable for this value. But the product of the specific debonding energy with the dissipation volume is the decisive quantity. Depending on the used debonding criterion, i. e. stress or energy, different conclusions can be drawn. The energy criterion leads to the conclusion that the debonding process inducing fracture toughness independent of particle size, however, the stress criterion at the interface supports the conclusion that smaller particles increase facture toughness.

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“…First, carbon nanotubes have been shown to toughen composites by bridging crazes at the onset of matrix fracture [40]. Nanoparticles have also been known to increase fracture toughness through the formation of a large number of subcritical microcracks or micro voids and retard flaw coalescence into critical cracks [41], and to promote crack bridging effects and subsequent yielding of interparticle matrix ligaments [42,43]. Second, the interactions between the f-MWCNTs and polyDCPD (through measured values ranging from 400 GPa [44] to just 50 GPa [45], which means that the modulus strongly depend on the concentration of defects.…”

Section: Resultsmentioning

confidence: 99%

ROMP-based polymer composites and biorenewable rubbers

Jeong

2009

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Inorganic particle toughening II: toughening mechanisms of glass bead filled epoxies

Cited by 131 publications

References 46 publications

Fracture toughness modelling of polymers filled with inhomogeneously distributed rigid spherical particles

Fracture toughness modelling of polymers filled with inhomogeneously distributed rigid spherical particles

On the effect of particle size on fracture toughness of polymer composites

ROMP-based polymer composites and biorenewable rubbers

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