Microstructure-based simulation of thermomechanical behavior of composite materials by object-oriented finite element analysis

Chawla, Nikhilesh; Patel, B.; Koopman, M.; Chawla, K. K.; Saha, Ratan K.; Patterson, Burton R.; Fuller, Edwin R.; Langer, Stephen A.

doi:10.1016/s1044-5803(03)00054-8

Cited by 116 publications

(69 citation statements)

References 21 publications

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“…The authors have previously shown [36] that the matrix agglomerations result in an increase in localised stress concentrations. Similarly, Chawla et al [3,50] found that the inclusion of regions filled predominantly with the second phase material caused an increase in stress concentrations in nearby clusters of particles. This is clearly visible from Figure 7.…”

Section: Strength Analysismentioning

confidence: 89%

Analysis of two-phase ceramic composites using micromechanical models

Alveen

McNamara

Carolan

et al. 2014

Computational Materials Science

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Micromechanical models of two-phase ceramic composites are created using a modified Voronoi tessellation approach. These representative Finite Volume (FV) microstructures are used to investigate the role of microstructure on fracture of advanced ceramics. An arbitrary crack propagation model using a cell-centred finite volume based method is implemented. In particular the effect of matrix content is examined. It is shown that the underlying microstructure significantly affects the local stress and strain distributions for a two-phase ceramic containing hard particles in a softer matrix. Simulation results indicate that an increase in the volume fraction of these hard grains leads to an increase in strength of the composite material. Furthermore, it is found that the homogeneity of the microstructure affects the overall strength.

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Section: Strength Analysismentioning

confidence: 89%

Analysis of two-phase ceramic composites using micromechanical models

Alveen

McNamara

Carolan

et al. 2014

Computational Materials Science

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“…It follows that an accurate simulation of the material behavior can really only be obtained by incorporating actual 3D microstructures as a basis for the model. Chawla and co-workers [18][19][20] have developed and employed microstructure-based finite element techniques that are able to incorporate the "true" composite microstructures. These models consider the inherent particle morphology and clustering of particles, as a basis for analysis using finite element techniques, with minimal approximations.…”

Section: Introductionmentioning

confidence: 99%

“…Our initial work in this area concentrated on simple linear elastic analysis of two-dimensional (2D) microstructures [18]. Here, microstructural images from optical and/or scanning electron microscopy were segmented, and transformed into a vectorial format, for finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional (3D) microstructure-based modeling of interfacial decohesion in particle reinforced metal matrix composites

Williams

Segurado

LLorca

et al. 2012

Materials Science and Engineering: A

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106

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Modeling and prediction of the overall elastic-plastic response and local damage mechanisms in heterogeneous materials, in particular particle reinforced composites, is a very complex problem. Microstructural complexities such as the inhomogeneous spatial distribution of particles, irregular morphology of the particles, and anisotropy in particle orientation after secondary processing, such as extrusion, significantly affect deformation behavior. We have studied the effect of particle/matrix interface debonding in SiC particle reinforced Al alloy matrix composites with (a) actual microstructure consisting of angular SiC particles and (b) idealized ellipsoidal SiC particles. Tensile deformation in SiC particle reinforced Al matrix composites was modeled using actual microstructures reconstructed from serial sectioning approach. Interfacial debonding was modeled using user-defined cohesive zone elements.Modeling with the actual microstructure (versus idealized ellipsoids) has a significant influence on: (a) localized stresses and strains in particle and matrix, and (b) far-field strain at which localized debonding takes place. The angular particles exhibited higher degree of load transfer and are more sensitive to interfacial debonding. Larger decreases in stress are observed in the angular particles, because of the flat surfaces, normal to the loading axis, which bear load. Furthermore, simplification of particle morphology may lead to erroneous results.

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“…Thus the mesh reproduces exactly the original microstructure, namely the inclusions size, morphology, spatial distribution, and the respective volume fraction of the different constituents. A objectoriented finite element code, OOF [205,206], developed by National Institute of Standards and Technology (NIST), has been extensively used in analyzing fracture mechanisms and material properties of heterogeneous materials [207][208][209][210][211][212][213][214][215][216] and mechanical properties of nanocomposites Vol.9,No.4 Characterizing and Modeling Mechanical Properties of Nanocomposites 295 [8,178,179,217]. In the following, a 2D object-oriented finite element modeling will be discussed, followed by a 3D modeling.…”

Section: Object-oriented Modelingmentioning

confidence: 99%