Size effect of particles on the damage dissipation in nanocomposites

Chen, Jiankang; Huang, Zhuping; Zhu, Jie

doi:10.1016/j.compscitech.2007.05.020

Cited by 68 publications

(36 citation statements)

References 12 publications

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“…However, it becomes clear that smaller particles demand higher local stresses for debonding to be initiated. Similar results where derived by Chen et al [4]. The authors considered particle deformation and obtained for the local (radial) debonding stress at the interface:…”

Section: Micromechanical Model For Particle-particle Interaction Debsupporting

confidence: 75%

“…Yielding processes, as diffuse shear yielding and microshear banding, are addressed to be more important for toughening of such composites. Recently Chen et al [4] examined the influence of particle size on damage dissipation in nanocomposites. They concluded on the basis of an energy debonding criterion that damage dissipation is strongly dependent on the size of particles and that smaller particles are favourable to increase material toughness.…”

Section: Introductionmentioning

confidence: 99%

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

Lauke

2008

Composites Science and Technology

103

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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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Section: Micromechanical Model For Particle-particle Interaction Debsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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

Lauke

2008

Composites Science and Technology

103

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“…The nanoparticle size effect on the energy dissipation due to the interfacial debonding has been studied by Chen et al (2007) by means of an energy analysis of the process. These authors derived a simple size-dependent formulation for the debonding stress, which was later used to compute the energy dissipation due to interfacial debonding.…”

Section: Introductionmentioning

confidence: 99%

“…Since the matrix mechanical stiffness properties are low, much attention, in the recent literature, has been paid to nanoscale reinforcements to significantly increase polymer stiffness, strength and toughness with low reinforcement concentrations (see, among the others, Wetzel et al, 2003, Wichmann et al, 2006, Cortes et al, 2010, Ayatollahi et al, 2011. Accordingly, an interest in the subject of the filler size effect at the nano meter scale has been arisen.The nanoparticle size effect on the energy dissipation due to the interfacial debonding has been studied by Chen et al (2007) by means of an energy analysis of the process. These authors derived a simple size-dependent formulation for the debonding stress, which was later used to compute the energy dissipation due to interfacial debonding.…”

mentioning

confidence: 99%

The Effect of Surface Stresses on the Critical Debonding Stress Around Nanoparticles

2011

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With the aid of an energy analysis and the surface elasticity theory, this work provides a closed form solution for the critical debonding stress of a rigid nanoparticle embedded in an elastic matrix subjected to a remote hydrostatic stress. It is proved that the debonding stress depends on the particle radius, the matrix elastic properties and the fracture energy per unit surface. The solution allows quantifying the effects of surface elastic constants, also showing that the smaller the particle size the more significant those effects are

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“…Subsequently, knowing the macro values of stress and strain tensor it is possible to compute approximated values at the micro level, in each phase. Micromechanical models have been applied in several studies to predict elastic properties of nanocomposites (Luo & Daniel, 2003;Wu et al 2004;Wilkinson et al, 2007;Chavarria & Paul, 2004) as well as damage and failure Chen et al, 2003;Chen et al, 2007;Boutaleb et al, 2009). Luo et al (Luo & Daniel, 2003) studied properties enhancement of epoxy matrix reinforced with silicate clay particles.…”

Section: Micro and Multiscale Modelingmentioning

confidence: 99%