Abstract The present paper proposes a mesoscopic continuum approach in order to describe the behavior of microdomains within carbon fiber precursory mesophase pitch. are assumed have an orientation, which is determined by average orientation particles that form it. On space, balance equations for presented. Evolution density and crystalline proposed. In determine temporal variation microdomain ...

The use of fiber reinforced materials such as randomly-oriented strands has grown in recent years, especially for manufacturing of aerospace composite structures. This growth is mainly due to their advantageous properties: they are lighter and more resistant to corrosion when compared to metals and are more easily shaped than continuous fiber composites. The resistance and stiffness of these ma...

Fiber suspension theory model parameters for use in the simulation of fiber orientation in complex flows are, in general, either calculated from theory or fit to experimentally determined fiber orientation generated in processing flows. Transient stress growth measurements in startup of shear flow and flow reversal in the shear rate range, γ = 1 to 10 s, were performed on a commercially availab...

Introduction: It has been shown [1] that one third of voxels in a brain volume include more than one orientation of fibre bundles. To better consider this condition, recently, HARDI methods such as q-ball, DSI, PASMRI, Spherical Deconvolution methods [2, 3, 4, 5, 6], have been proposed. These solutions have demonstrated to be more accurate to describe white matter in regions with complex tissue...

Methods for estimation of grow index of tealeaves based on Bi-directional Reflectance Distribution Function: BRDF measurements with ground based network cameras is proposed. Due to a fact that Near Infrared: NIR camera data is proportional to total nitrogen while that shows negative correlation to fiber contents, it is possible to estimate nitrogen and fiber contents in tealeaves with ground ba...

A numerical technique is developed to determine the three-dimensional fiber orientation in complex flows. The fiber orientation state is specified in terms of orientation tensors, which are used in several constitutive models. This method is applied to quasi-steady state Hele-Shaw flows in order to predict the flowinduced fiber orientation during injection molding at zero volume fraction limit....

Abstract During 3D-printing of fiber-reinforced concrete, fibers tend to align with the printing direction due strong shearing deformation material, allowing for controlled production components desired fiber orientation states. The accurate prediction state in printed poses a major challenge large number processing and material parameters involved complex mechanisms flow reorientation during p...