Prediction of fracture toughness of ceramic composites as function of microstructure: I. Numerical simulations

Li, Yan; Zhou, Min

doi:10.1016/j.jmps.2012.09.013

Cited by 73 publications

(39 citation statements)

References 36 publications

(33 reference statements)

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“…However, on a few occasions, particle fracture did occur, when the particle is directly in front of the approaching crack. A similar observation has been made in the literature . Such instances of particle fracture despite its higher strength can also be attributed to the irregular shape and clustering of the particles (ie, local stress conditions occur such that particle fracture is favoured).…”

Section: Effect Of Particle Fracture Properties On Mechanical Behavioursupporting

confidence: 83%

A micromechanical fracture analysis to investigate the effect of healing particles on the overall mechanical response of a self‐healing particulate composite

Ponnusami

Krishnasamy

Turteltaub

et al. 2018

Fatigue Fract Eng Mat Struct

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A computational fracture analysis is conducted on a self‐healing particulate composite employing a finite element model of an actual microstructure. The key objective is to quantify the effects of the actual morphology and the fracture properties of the healing particles on the overall mechanical behaviour of the (MoSi2) particle‐dispersed Yttria Stabilised Zirconia (YSZ) composite. To simulate fracture, a cohesive zone approach is utilised whereby cohesive elements are embedded throughout the finite element mesh allowing for arbitrary crack initiation and propagation in the microstructure. The fracture behaviour in terms of the composite strength and the percentage of fractured particles is reported as a function of the mismatch in fracture properties between the healing particles and the matrix as well as a function of particle/matrix interface strength and fracture energy. The study can be used as a guiding tool for designing an extrinsic self‐healing material and understanding the effect of the healing particles on the overall mechanical properties of the material.

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Section: Effect Of Particle Fracture Properties On Mechanical Behavioursupporting

confidence: 83%

A micromechanical fracture analysis to investigate the effect of healing particles on the overall mechanical response of a self‐healing particulate composite

Ponnusami

Krishnasamy

Turteltaub

et al. 2018

Fatigue Fract Eng Mat Struct

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“…In order to relate the bulk electrical conductivity behavior of the ternary composite to the microstructure, a reliable method of quantifying the microstructure is required. Two‐point correlation functions provide a means to directly compare the characteristic lengths of the numerically generated microstructures with the experimental observations. Moreover, the length dependency of the two‐point correlation means that the techniques contains enough information to provide a complete description of the microstructure across the length scales and provide both microstructural information, such as characteristic lengths and distribution of phases, as well as macroscopic information, such as phase volume fraction and existence of long range structure.…”

Section: Characterization Of Microstructuresmentioning

confidence: 99%

Experimental and numerical analysis of conductive ternary polymer blend composites

Brigandi

Carolan

Cogen

et al. 2017

J of Applied Polymer Sci

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Experimental and theoretical analysis of the phase morphology and electrical conductivity of a carbon black (CB)‐filled polypropylene /poly(methyl methacrylate) /ethylene acrylic acid copolymer ternary system were compared. The Cahn‐Hilliard theory was used to model and predict the phase morphology and electrical conductivity as a function of the constituents' characteristics of the ternary system. A method for generating statistically representative microstructures of a co‐continuous ternary polymer system and a numerical method for calculating the resultant electrical conductivity of these ternary polymer systems are presented. Excellent agreement between numerically calculated and experimentally measured results was observed. The developed analytical and numerical models were able to successfully predict the electrical percolation threshold with that of ternary polymer composites containing CB as a conductive medium with minimal experimental input. The combination of experimental and numerical results presented suggests the optimization of the conductive minor phase includes having a conductivity beyond the critical percolation threshold, is at least three orders of magnitude greater than either of the two nonconductive phases, and has a lower viscosity than the other two major phases in order to maximize the phase separation kinetics. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44749.

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“…To this end, two point correlation functions were used to characterise the phase morphology as a function of time. These functions have been used previously by a number of researchers to quantify microstructures [50][51][52]. First, the diffuse phase boundaries are converted to a binary representation via an image thresholding operation.…”

Section: Two-dimensional Casesmentioning

confidence: 99%

Co-continuous polymer systems: A numerical investigation

Carolan

Chong

Ivanković

et al. 2015

Computational Materials Science

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a b s t r a c tA finite volume based implementation of the binary Cahn-Hilliard equation was implemented using an open source library, OpenFOAM. This was used to investigate the development of droplet and co-continuous binary polymer microstructures. It was shown that the initial concentrations of each phase define the final form of the resultant microstructure, either droplet, transition or co-continuous. Furthermore, the mechanical deformation response of the representative microstructures were investigated under both uniaxial and triaxial loading conditions. The elastic response of these microstructures were then compared to a classic representative microstructure based on a face centred cubic arrangement of spheres with similar volume fractions of each phase. It was found that the numerically predicted composite Young's modulus closely followed the upper Hashin-Shtrikman bound for both co-continuous and classical structures, while significant deviations from analytical composite theory were noted for the calculated values of Poisson's ratio. The yield behaviour of the composite microstructures was also found to vary between the co-continuous microstructures and the representative microstructure, with a more gradual onset of plastic deformation noted for the co-continuous structures. The modelling approach presented allows for the future investigation of binary composite systems with tuneable material properties.

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Prediction of fracture toughness of ceramic composites as function of microstructure: I. Numerical simulations

Cited by 73 publications

References 36 publications

A micromechanical fracture analysis to investigate the effect of healing particles on the overall mechanical response of a self‐healing particulate composite

A micromechanical fracture analysis to investigate the effect of healing particles on the overall mechanical response of a self‐healing particulate composite

Experimental and numerical analysis of conductive ternary polymer blend composites

Co-continuous polymer systems: A numerical investigation

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