Fe micro-models to study contact states, stresses and failure mechanisms in a polymer composite subjected to a sliding steel asperity

Goda, Tibor; Váradi, Károly; Friedrich, K.

doi:10.1016/s0043-1648(01)00797-9

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…This can be reached by considering average strains and stresses according to (3) and (4). The complete roving can be modeled as homogeneous population of such model-cells.…”

Section: The Roving Model-cellmentioning

confidence: 99%

Numerical Estimation Method of Orthotropic Material Properties of a Roving for Reinforcement of Composite Materials

2016

APH

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“…This can be reached by considering average strains and stresses according to (3) and (4). The complete roving can be modeled as homogeneous population of such model-cells.…”

Section: The Roving Model-cellmentioning

confidence: 99%

Numerical Estimation Method of Orthotropic Material Properties of a Roving for Reinforcement of Composite Materials

2016

APH

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“…In more details, the carbon fibers are not positioned within the same horizontal plane which leads the counter body to be in contact first with the higher fibers, then to the lower positioned ones. It was shown that the highest contact pressure appears at the rear edge of each fiber within the contact area [23] because of the discontinuous stress distribution. The stress is absorbed mostly by the matrix through the depth until countering the carbon fibers which are brittle and limited to absorb the stress.…”

Section: Coefficient Of Frictionmentioning

confidence: 99%

“…The stress is transferred from a certain but relatively high number of fibers to another large set of fibers. Sliding in a perpendicular direction will thus be accommodated discontinuously by repeated compression-tension [23]. In this case, some cracks also grow within the fiber and propagate parallel to the surface, as can be seen in Figure 12a.…”

mentioning

confidence: 99%

Surface and sub-surface degradation of unidirectional carbon fiber reinforced epoxy composites under dry and wet reciprocating sliding

Dhieb

Buijnsters

Eddoumy

et al. 2013

Composites Part A: Applied Science and Manufacturing

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In this paper, the effect of water on the friction and wear of a carbon fiber reinforced epoxy tested under reciprocating sliding against a stainless steel counter body is reported. The tribological behavior of unidirectional carbon fiber reinforced epoxy composite was investigated in ambient air and in demineralized water, and the role of water on the (sub-) surface degradation is discussed. The effect of sliding direction relative to the fiber orientation has been studied. The correlation between the debonding of carbon fibers at the fiber-epoxy interface, and the wear behavior of the carbon fiber composite are discussed based on an indepth analysis of the worn surfaces done by environmental scanning electron microscopy, white light interferometry, atomic force microscopy, and focused ion beam. We demonstrate that the carbon fiber reinforcement greatly improves the tribological properties of epoxy under sliding in both dry environment and demineralized water. A reciprocating sliding performed along an anti-parallel direction to the fiber orientation under dry conditions results in a large degradation by debonding and breaking of the carbon fibers compared to sliding in 2 parallel and perpendicular directions. Immersion in water has a harmful effect on the wear resistance of the carbon fiber reinforced epoxy composite. The competition between crack growth and the wear rate of epoxy matrix and/or carbon fibers in the sliding track determines the level of material loss of the composite in both test environments.

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“…Currently these models are used to study local effects such as the contact, stress and strain produced by a steel ball sliding on the surface of a composite [2,3], or to analyse of the propagation of a matrix crack from a debonded fiber [4] or to study the effect of the interface, for a particle reinforced metal matrix composite, in the macro tensile stress/strain curve [5], etc. The problem with this kind of models is that its use is limited by its computational cost.…”

Section: Introductionmentioning

confidence: 99%

Numerical homogenization for composite materials analysis. Comparison with other micro mechanical formulations

Otero

Oller

Martı́nez

et al. 2015

Composite Structures

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This work presents a two-scale homogenization procedure to analyze three dimension composite structures by the finite element method. The theory implemented is compared with other micro-structural formulations: micro models and the serial-parallel mixing theory, in terms of result accuracy and computational cost. The comparison shows that for linear analysis, the homogenization proposed is an excellent alternative to the other formulations considered. Its computational cost is substantially lower than the one required by the micro-model and it is able to capture some micro-structural phenomena that it is not automatically recorded by the serial-parallel mixing theory. It will also be shown that the extension of the proposed theory to the non-linear range stills represents a challenge. The major limitation is its prohibitive computational cost because it requires solve the sub scale at each gauss point and each load step. However the comparison shows that this cost is in terms of CPU time but not in terms of memory. Based on the results obtained, it can be concluded that the homogenization method is an excellent alternative for the simulation of materials with complex micro structures. The method is also very promising for non linear simulations, * Corresponding author

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Fe micro-models to study contact states, stresses and failure mechanisms in a polymer composite subjected to a sliding steel asperity

Cited by 10 publications

References 8 publications

Numerical Estimation Method of Orthotropic Material Properties of a Roving for Reinforcement of Composite Materials

Numerical Estimation Method of Orthotropic Material Properties of a Roving for Reinforcement of Composite Materials

Surface and sub-surface degradation of unidirectional carbon fiber reinforced epoxy composites under dry and wet reciprocating sliding

Numerical homogenization for composite materials analysis. Comparison with other micro mechanical formulations

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