Numerical Study of Damage Growth in Particulate Composites

Kwon, Young W.; Liu, C. T.

doi:10.1115/1.2812404

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…the vertical direction in Figure 3) with the opposite side constrained in motion. That is, the study was a uniaxial tensile case as performed in previous experiments 10 . The load was applied with displacement control with increments.…”

Section: ) Through 3(d)mentioning

confidence: 99%

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Microstructural Effects on Damage Behaviour in Particle Reinforced Composites

Kwon

Liu

2003

Polymers and Polymer Composites

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This paper discusses the effects of non-uniform, random particle distribution on damage initiation and growth, leading to short cracks and breakage of particle reinforced composite specimens. A multi-scale technique was employed to model and simulate damage. Damage was described at the constituent material level (i.e. micro-level) and the results were compared qualitatively and quantitatively with experimental observation. Both results agreed well. Non-uniform, random particle distribution yielded sporadic crack initiation and growth within a uniform tensile specimen. No local crack propagated beyond a certain size. Breakage of the specimens was not caused by the continuous growth of a single critical crack. Instead, coalescence of neighbouring sporadic short cracks resulted in breakage of the specimens. Computer simulation indicated that random particle distribution affected the strength of the composite significantly, but as expected, not its effective stiffness. However, if there was a pre-existing crack in the specimen before loading, the effect of the random particle distribution on the initial crack and the strength of the composite was almost negligible.

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Section: ) Through 3(d)mentioning

confidence: 99%

“…Progressive damage in the specimen was simulated using the multi-scale technique [10][11][12] . A schematic sketch of the multi-scale technique for particulate composites is given in Figure 4.…”

Section: ) Through 3(d)mentioning

confidence: 99%

Microstructural Effects on Damage Behaviour in Particle Reinforced Composites

Kwon

Liu

2003

Polymers and Polymer Composites

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“…One issue of particular concern with particle composites has been degradation of the composite due to failure of the particle-matrix interfacial bond [14][15][16] . The failure of the bond may be due to sub surface spallation in the particle, loss of adhesion between particle and matrix, or near surface cracking or fragmentation of the matrix near the fiber.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Terfenol-D particle epoxy composites under low-frequency cyclic magneto-mechanical loading at the matrix glass transition start and finish temperatures

2004

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The present paper presents cyclic strain amplitude and longitudinal strain measurements of longitudinally compressed Terfenol-D particle samples subjected to magneto-strain cycling. A comparison is made of the responses of material strain cycle tested at temperatures near the matrix glass transition start temperature, and material strain cycle tested at a temperature near the matrix glass transition finish temperature. The cyclic strain amplitude of the material was significantly larger when tested at a temperature near the matrix glass transition finish temperature. A useful range of longitudinal applied stress exists where the composite suffers little apparent degradation. Beyond this range the composite exhibits steadily decreasing cyclic strain amplitude with increases in longitudinal compressive stress magnitude.

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“…The micro-macroapproach is advantageous to combine two levels of analyses of micro and macrolevel analyses, and it has been extensively used to establish constitutive equation for metal or polymeric matrix composites in recent years (Pecknold and Rahman, 1994;Golanski et al, 1997;Kwon and Liu, 1999). However, only a few studies were conducted on CFCC, and most of them were limited to unidirectional composites (Solti et al, 1997;Water et al, 1997;Walter, 1998).…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Behavior Analysis of CFCC with Overall Anisotropic Damage by the Micro-Macro Scale Method

Luo

Takezono

Tao

et al. 2003

International Journal of Damage Mechanics

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In this paper, a micro-macromechanical approach is used to establish the macroscopic constitutive model with anisotropic damage in continuous fiber reinforced ceramic matrix composites (CFCC). For microlevel analysis of unit cell, the homogenization method based on double-scale asymptotic expansion is used to derive the material properties of composites. The macrolevel analysis is conducted to compute the macrostresses and strains with anisotropic damage. The two analyses are conducted by using Finite Element Method (FEM). An overall anisotropic damage tensor for the whole composite is used to describe all types of damage that composite undergoes, such as matrix cracking, fiber breakage, and interfacial damage between matrix and fiber. The damage evolution equation is obtained by using thermodynamic theory. The numerical calculation is carried out to investigate and to predict the onset and evolution of anisotropic damage for composites with different types of laminate. The damage material parameters are determined by fitting the numerical results to the experimental data, and some results are compared well with experimental results in the literature [Wang, S.W. and Parvizi-Majidi, A. (1992). Experimental Characterization of the Tensile Behavior of Nicalon Fiber-Reinforced Calcium Aluminosilicate Composites, Journal of Materials Science, 27: 5483-5496.]. By using the proposed model, the stiffness and nonlinear stress-strain response of brittle composite materials are predicted, and the macroscopic elastic brittle anisotropic damage behavior is also described

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Numerical Study of Damage Growth in Particulate Composites

Cited by 6 publications

References 22 publications

Microstructural Effects on Damage Behaviour in Particle Reinforced Composites

Microstructural Effects on Damage Behaviour in Particle Reinforced Composites

Degradation of Terfenol-D particle epoxy composites under low-frequency cyclic magneto-mechanical loading at the matrix glass transition start and finish temperatures

The Mechanical Behavior Analysis of CFCC with Overall Anisotropic Damage by the Micro-Macro Scale Method

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