Micromechanical modelling of the static and cyclic loading of an Al 2124-SiC MMC

Bruzzi, Mark; McHugh, Peter E.; O'Rourke, F.; Linder, Tomas

doi:10.1016/s0749-6419(00)00063-2

Cited by 48 publications

(18 citation statements)

References 18 publications

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“…Based on a continuum crystal plasticity model, Bruzzi et al [41] estimated the state of stress within the matrix and incorporated the stress gradient along a predefined crack path into investigation of the effect of reinforcing particles on a small fatigue crack [42]. The existence of such a gradient of stress is important because it increases the driving force at the crack tip and thus accelerates the crack growth close to the interface [12,43].…”

Section: Discussionmentioning

confidence: 99%

Fatigue crack growth from a cracked elastic particle into a ductile matrix

Groh

Olarnrithinun

Curtin

et al. 2008

Philosophical Magazine

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Fatigue crack growth from a cracked elastic particle into a ductile matrix Groh, S.; Olarnrithinun, S.; Curtin, W. A.; Needleman, A.; Deshpande, V. S.; Van der Giessen, E. The monotonic and cyclic crack growth rate of cracks is strongly influenced by the microstructure. Here, the growth of cracks emanating from pre-cracked micron-scale elastic particles and growing into single crystals is investigated, with a focus on the effects of (i) plastic confinement due to the elastic particle and (ii) elastic modulus mismatch between the reinforcement and matrix phases. Due to the small sizes of the particles and cracks, plasticity in the ductile crystal is modelled using a 2D discrete dislocation plasticity framework wherein dislocations are modelled as line singularities in an isotropic elastic isotropic material. Crack growth is modelled using a cohesive surface. Calculations reveal a threshold for fatigue crack growth and a transition to Paris power-law behavior, both depending on the existence of the elastic particle and the modulus mismatch. For a matched-modulus particle, the threshold is reduced by 25% and is attributed to slip blockage by the particle. For a high-modulus particle, the threshold is reduced by 50% due to the enhanced stress intensity factor caused by elastic mismatch and due to some slip blockage. However, crack growth halts after some amount of crack advance due to the decreasing effect of elastic mismatch and slip blocking as the crack moves away from the particle. The broad results here are compared with experimental observations in the literature, and are consistent in a number of respects. These results show that fatigue crack growth from micron-scale particles is strongly influenced by plasticity size effects, elastic mismatch, and particle constraints on plastic flow, all of which are captured within a discrete dislocation plasticity framework.

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Section: Discussionmentioning

confidence: 99%

Fatigue crack growth from a cracked elastic particle into a ductile matrix

Groh

Olarnrithinun

Curtin

et al. 2008

Philosophical Magazine

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“…Computational micro-mechanical (CMM) [1][2][3] method has been widely used to investigate the mechanical properties of metal matrix composites (MMCs) over the past 10-15 years. CMM is based on constructing the representation of the real micro-structure of MMCs in the numerical model to predict their macro-mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…CMM is based on constructing the representation of the real micro-structure of MMCs in the numerical model to predict their macro-mechanical properties. It can be used to relate the MMCs' micro-structural features to their macroscopic mechanical performance in terms of deformation mechanisms, strengthening mechanisms and failure mechanisms [1,2]. However, it is currently difficult to construct 3D finite element (FE) models with the complete realistic micro-structure of MMCs, such as the realistic particles' geometries and distribution, and even it is beyond the computational capabilities.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is currently difficult to construct 3D finite element (FE) models with the complete realistic micro-structure of MMCs, such as the realistic particles' geometries and distribution, and even it is beyond the computational capabilities. Many simplified or idealized 2D and 3D CMM models are introduced to represent the micro-structures of MMCs and used to research their mechanical properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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The prediction of the dynamic responses of ceramic particle reinforced MMCs by using multi-particle computational micro-mechanical method

Zhang

Liu

Zhai

et al. 2007

Composites Science and Technology

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“…Fiber alignment is often obtained during processing by using either contracting flow or expanding flow in the extrusion. The mechanism of strengthening and the mechanical properties of metal matrix composites have attracted a considerable number of investigations (see, for example, Li and Ponte Castan˜eda, 1993;Zhu and Zbib, 1995;Kailasam and Ponte Castan˜eda, 1998;Llorca and Gonza´lez, 1998;Shu and Barlow, 2000;Wickowski, 2000;Bruzzi et al, 2001;Chaboche et al, 2001;Carmai and Dunne, in press;Naboulsi and Palazotto, in press).…”

Section: Introductionmentioning

confidence: 99%

Plastic constitutive behavior of short-fiber/particle reinforced composites

Wang

2003

International Journal of Plasticity

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A cylindrical cell model based on continuum theory for plastic constitutive behavior of short-fiber/particle reinforced composites is proposed. The composite is idealized as uniformly distributed periodic arrays of aligned cells, and each cell consists of a cylindrical inclusion surrounded by a plastically deforming matrix. In the analysis, the non-uniform deformation field of the cell is decomposed into the sum of the first order approximate field and the trial additional deformation field. The precise deformation field are determined based on the minimum strain energy principle. Systematic calculation results are presented for the influence of reinforcement volume fraction and shape on the overall mechanical behavior of the composites. The results are in good agreement with the existing finite element analyses and the experimental results. This paper attempts to stimulate the work to get the analytical constitutive relation of short-fiber/particle reinforced composites. #

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Micromechanical modelling of the static and cyclic loading of an Al 2124-SiC MMC

Cited by 48 publications

References 18 publications

Fatigue crack growth from a cracked elastic particle into a ductile matrix

Fatigue crack growth from a cracked elastic particle into a ductile matrix

The prediction of the dynamic responses of ceramic particle reinforced MMCs by using multi-particle computational micro-mechanical method

Plastic constitutive behavior of short-fiber/particle reinforced composites

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