“…where is the viscosity of the lubricating fluid, is the velocity and is the normal force acting on the contact surface. The Stribeck theory has been used by several researchers to analyse and model the friction behaviour of composite materials [30][31][32].…”
Section: Friction In Thermoplastic Composite Formingmentioning
confidence: 99%
“…The Stribeck theory has been used by several researchers to analyse and model the friction behaviour of composite materials. 30–32 Figure 3.Typical Stribeck curve showing the different lubrication regimes.…”
Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.
“…where is the viscosity of the lubricating fluid, is the velocity and is the normal force acting on the contact surface. The Stribeck theory has been used by several researchers to analyse and model the friction behaviour of composite materials [30][31][32].…”
Section: Friction In Thermoplastic Composite Formingmentioning
confidence: 99%
“…The Stribeck theory has been used by several researchers to analyse and model the friction behaviour of composite materials. 30–32 Figure 3.Typical Stribeck curve showing the different lubrication regimes.…”
Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.
“…A number of macroscopic models were developed to be used in continuous finite element formulation [19,[28][29][30] taking into account, at the same time, implicitly the yarn directions from the mesoscopic scale. The difference in their formulations requires different parameters to be input, and correspondingly makes a model to be attached to one or another experimental test, which is sometimes not advantageous.…”
Section: Fea Continuousmentioning
confidence: 99%
“…Recently, a hyperelastic objective constitutive model for large deformations of woven materials has been proposed by Aimene et al [20,30] to be implemented in the continuum FE formulation. The hyperelastic approach is a good solution to address at macro-scale the strong nonlinearities of the material originating from its meso-and microstructural rotations.…”
To cite this version:Elena Syerko, Sébastien Comas-Cardona, Christophe Binetruy. Models for shear properties/behavior of dry fibrous materials at various scales: a review.Abstract During forming operations of dry fibrous materials in order to get the composite preforms, the deformation mode is substantially determined by the occurring shear strains. Consideration of the material shear response namely from the theoretical point of view has gained high importance because multi-scale nature and anisotropy of fibrous materials complicates their experimental investigation, which raises the question of the tests realizability, complexity, and cost. This work analyses and classifies the existing theoretical approaches for the shear prediction with respect to the mathematical principles employed, as well as with respect to the architecture of diverse fibrous materials, to which the approach can be applied. Both classifications depend in turn on the main criterion of classification emphasized here -the scale of observation of the shear load. According to the theoretical framework, the approaches form the main groups based either on purely geometrical reasoning, or on finite elements analysis, or on energy minimization, or on forces equilibrium principle. The approaches are compared according to the total of mechanical factors included in their analysis and typical for a certain stage of shear load and a certain scale (micro-, meso-, or macro-). The advantages and difficulties of each of the methods are evaluated.
“…Several other models developed for woven fabrics have been proposed, which could potentially be adapted in modelling NCFs (e.g. Aimene et al , 2008;2010;Xue et al , 2003;Lee et al , 2008;Peng et al , 2010). Also, another consideration when modelling the forming of biaxial fabrics that has been discussed in the literature, but not in this chapter, is the numerical problem of element locking that can occur when the fi bre directions of the fabric are not aligned with the mesh (Yu et al , 2006;Thije and Akkerman 2008;.…”
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