Multiscale modeling of failure in metal matrix composites

Xia, Zhenhai; Peters, P.W.M.

doi:10.1016/s1359-6454(00)00317-7

Cited by 97 publications

(49 citation statements)

References 24 publications

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“…Notice that at times t = 20 and t = 2000, 16 and 14 layers of particles are observed, respectively, due to the reorganization of initially 100 oriented crystal to its final (preferred 111) orientation. The simulated transient behavior of the friction coefficients for four model metals is plotted in Figure 8 (left); it covers experimentally observed behavior [37,38,39]. For the presented data the total simulation time was of the order of 10 −10 − 10 −9 s and hence smaller than the minimum "lifetime" of a contact zone 10 −7 s, to be determined by the typical size of a zone (10µm) divided by a high velocity, e.g., 100 m/s.…”

Section: Uniaxial Compressionsupporting

confidence: 66%

Towards Multiscale Modeling of Metals via Embedded Particle Computer Simulation

Kröger¹,

Stanković²,

Hess³

2003

Multiscale Model. Simul.

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Abstract. The embedded atom method is adapted to study solid friction and the mechanical behavior of a model metal which incorporates the effect of electronic glue in its structure. The elastic properties of real metals are reproduced by a set of basic model potentials as revealed by analytic considerations. A slightly modified version of a classical nonequilibrium molecular dynamics computer simulation is employed to study the dynamics and structural changes of the model metal undergoing a process of solid friction and an uniaxial compression in order to analyze, e.g., plastic yield, transient friction coefficients, and the underlying structure. Under the appropriate choice of parameters, the model turns out to also be applicable for studying multiscale structures in porous metals.

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Section: Uniaxial Compressionsupporting

confidence: 66%

Towards Multiscale Modeling of Metals via Embedded Particle Computer Simulation

Kröger¹,

Stanković²,

Hess³

2003

Multiscale Model. Simul.

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“…The ineffective length obtained by the shear-lag model determines an effective, in-situ gauge length and associated characteristic fiber strength related to the composite tensile strength by the Weibull strength theory. This is favorable for composite strength predictions based on multiscale modeling [20][21][22].…”

Section: Resultsmentioning

confidence: 96%

Stress transfer around a broken fiber in unidirectional fiber-reinforced composites considering matrix damage evolution and interface slipping

Zhong

Zhang

Zhao

et al. 2010

Sci. China Phys. Mech. Astron.

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A shear-lag model is applied to study the stress transfer around a broken fiber within unidirectional fiber-reinforced composites (FRC) subjected to uniaxial tensile loading along the fiber direction. The matrix damage and interfacial debonding, which are the main failure modes, are considered in the model. The maximum stress criterion with the linear damage evolution theory is used for the matrix. The slipping friction stress is considered in the interfacial debonding region using Coulomb friction theory, in which interfacial clamping stress comes from radial residual stress and mismatch of Poisson's ratios of constituents (fiber and matrix). The stress distributions in the fiber and matrix are obtained by the shear-lag theory added with boundary conditions, which includes force continuity and displacement compatibility constraints in the broken and neighboring intact fibers. The result gives axial stress distribution in fibers and shear stress in the interface and compares the theory reasonably well with the measurement by a polarized light microscope. The relation curves between damage, debonding and ineffective region lengths with external strain loading are obtained. stress transfer, shear-lag, damage evolution, fiber composite PACS: 62.20.Mk, 46.50.+a, 81.05.Qk

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“…In order to simulate an interface, we extended the model for specification of the strength of interaction between particles i, j belonging to the same and to different materials, i.e., we introduce two factors e ij and w ij in front of Φ(r ij ) and w(r ij ) in the EMB model equations (1, [19] four model metals is plotted in Fig. 7 (left); it covers experimentally observed behavior [35]. For the presented data the total simulation time was of the order of 10 −10 − 10 −9 s and hence smaller than the minimum 'life time' of a contact zone 10 −7 s, to be determined by the typical size of a zone (10µm) divided by a high velocity, e.g., 100 m/s.…”

Section: Solid Frictionmentioning

confidence: 99%

Modeling of Metals and Metal Sponges via Embedded Particle Computer Simulation

Kröger¹

2003

Advances in Solid State Physics

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Abstract. In this article we review the embedded atom method when adapted to study solid friction and the mechanical behavior of model metals. The method incorporates the effect of electronic glue through effective many-body potentials. The elastic properties of real metals are reproduced by a set of basic model potentials as revealed by analytic considerations. A slightly modified version of a classical NonEquilibrium Molecular Dynamics (NEMD) computer simulation is employed to study the dynamics and structural changes of the model metal undergoing a process of solid friction and an uniaxial compression, in order to analyze, e.g. plastic yield, transient friction coefficients, and the underlying structure. Under appropriate choice of parameters, the model is also applicable to study porous metals.

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Multiscale modeling of failure in metal matrix composites

Cited by 97 publications

References 24 publications

Towards Multiscale Modeling of Metals via Embedded Particle Computer Simulation

Towards Multiscale Modeling of Metals via Embedded Particle Computer Simulation

Stress transfer around a broken fiber in unidirectional fiber-reinforced composites considering matrix damage evolution and interface slipping

Modeling of Metals and Metal Sponges via Embedded Particle Computer Simulation

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