A multi-scale and multi-mechanism approach for the fracture toughness assessment of polymer nanocomposites

Quaresimin, Marino; Salviato, Marco; Zappalorto, Michele

doi:10.1016/j.compscitech.2013.11.015

Cited by 73 publications

(30 citation statements)

References 26 publications

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“…The investigations in Hsieh et al (2010a,b), Lauke (2008), Williams (2010), and Quaresimin et al (2014) support the idea that the most effective approach to predict the nanocomposite toughness is a "multimechanism" modeling strategy, in which the contribution of each mechanism is appropriately determined and weighted according to the specific case (accounting for the type, morphology, and the functionalization of the nanofiller).…”

Section: Introductionmentioning

confidence: 76%

“…As discussed before, the two dominant mechanisms responsible for toughening improvements for polymers reinforced by rigid nanoparticles (such as silica or alumina nanoparticles) are the localized shear banding of the polymer and particle debonding followed by subsequent plastic yielding of nanovoids (Hsieh et al, 2010a,b;Quaresimin et al, 2014;Salviato et al, 2013b;Zappalorto et al, 2012a).…”

Section: A Multiscale Strategy To the Modeling Of The Toughness Impromentioning

confidence: 97%

“…Indeed, even if its contribution to energy absorption can be regarded as negligible, it might work as a trigger for other, more substantial, mechanisms such as plastic yielding or expansion of voids (caused by debonded particles) (Hsieh et al, 2010a, b;Williams, 2010;Quaresimin et al, 2014;Zappalorto et al, 2012a). The high hydrostatic stress concentration around a nanoparticle located within the crack process zone might induce the detachment of the particle from the polymer matrix.…”

Section: Other Microsized Mechanismsmentioning

confidence: 97%

“…Finally, the fracture toughness enhancement due to the single damage mechanism, to be inserted in Eq. (4.1), can be determined as (Quaresimin et al, 2014;Salviato et al, 2013b;Zappalorto et al, 2012a;Freund and Hutchinson, 1985;Huang and Kinloch, 1992):…”

Section: Nanoscale Systemmentioning

confidence: 99%

“…A multiscale and multimechanism model to assess the fracture toughness enhancement in nanoparticle-reinforced polymers were recently developed by the present authors (Quaresimin et al, 2014). The model accounts for the main damaging mechanisms, i.e., nanoparticle debonding, plastic yielding of nanovoids, and plastic shear banding of the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Section: Introductionmentioning

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Section: A Multiscale Strategy To the Modeling Of The Toughness Impromentioning

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Section: Other Microsized Mechanismsmentioning

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The flexible cellulose nanocrystal (CNC) strain sensors have gained attention owing to their great promising in human motion detection, electronic skin, and soft robotics. However, the effect of bending on the mechanical performance of the sensor altered by the variation of temperature is a key limitation to their potential. Here, the temperature‐dependent bending fatigue of the CNC‐graphene oxide‐Ag nanoparticles (NPs) strain sensor is systematically investigated, in which the sensitivity of the sensor is attenuated to 20% with the decreasing temperature from 30 to −30 °C after bending over 10 000 times. The finite element studies and theoretical calculations indicate that the interfacial crack can be caused by the stiffness mismatch between the Ag NPs and CNC at different temperatures. Under room temperature, the destruction and recombination of the hydrogen bonds network at the interfacial crack can effectively increase the dissipation of energy and hinder the development of cracks with repetitive bending stress. However, under low temperature, such recombination processes are broken by the formation of ice crystals in the CNC/Ag NPs interfacial cracks. The ice crystals accelerate the crack propagation and eventually make the CNC sensor suffer from deterioration.

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Effects of nanoparticle size and concentration on optical, toughness, and thermal properties of polycarbonate

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Schlarb

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J of Applied Polymer Sci

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The influences of size and content of silicon dioxide (SiO 2 ) nanoparticles on the morphological, optical, toughness, and thermal properties of polycarbonate (PC) were investigated. The PC nanocomposites were prepared using a twin-screw extruder followed by injection molding. The scanning electron microscope (SEM) micrographs displayed an adequate level of nano-SiO 2 particle distribution within the PC matrix but still revealed some agglomerated particles. Upon increasing the content of nanoparticles, slightly larger agglomerates formed. These agglomerated particles caused a reduction in material transparency due to light loss via reflection and scattering. However, the incorporation of nano-SiO 2 into the PC matrix greatly improved toughness properties and slightly increased glass-transition temperature (T g ), in conjunction with filler content (up to 4 vol %). This was particularly in the case with the smaller sized nano-SiO 2 , which not only significantly improved toughness but also enhanced optical properties of the PC nanocomposites.

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A multi-scale and multi-mechanism approach for the fracture toughness assessment of polymer nanocomposites

Cited by 73 publications

References 26 publications

Toughening mechanisms in nanoparticle polymer composites

Toughening mechanisms in nanoparticle polymer composites

Temperature‐Dependent Fatigue Characterization of Flexible Cellulose Nanocrystal Strain Sensor

Effects of nanoparticle size and concentration on optical, toughness, and thermal properties of polycarbonate

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