anew and effective electrospinning method has been developed for producing aligned polymer nanofibers. the conventional electrospinning technique has been modified to fabricate nanofibers as uniaxially aligned array. the key to the success of this technique is the creation of a rotating jet by using a cylindrical collector in which the needle tip is located at its center. the unique advantage o...

In this review paper, recent developments in the Fused Filament Fabrication (FFF) approach are provided for composite materials. Influencing parameters FFF process such as road width, print speed, layer thickness, feed rate and build temperature of model (both liquefier envelope temperature), fiber orientation, position, volume fraction, infill orientation have been studied. These considered st...

Introduction Diffusion-weighted MRI allows in vivo mapping of the diffusional properties of brain water and has revealed a high degree of diffusional anisotropy in white matter (1). Despite many studies of this anisotropy and the production of vector pictures showing fiber orientation within voxels of image planes, the actual reconstruction of neuronal projections by tracking of these vectors h...

Efficient utilization of structural timber requires accurate methods for machine strength grading. One the most presented this far is based on data local fiber orientation board surfaces, obtained from laser scanning. In paper, two potential improvements method are examined. The first one consists replacing a model simple integration over cross sections boards calculation bending stiffness by 3...

Abstract Continuous fiber-reinforced polymer (CFRP) has been paid more attention to due its advantages of high strength, stiffness, and lightweight. However, it is challenging for topology optimization achieve CRRP structure design. A (TO) model with minimizing structural compliance under volume fraction constraint established based on the independent continuous mapping (ICM) method. The fiber ...

We achieved 2.35-4.75 μm continuous spectrum from an Er-fiber pumped subharmonic OPO based on orientation-patterned GaP that is suitable for ultra-broad bandwidth comb generation. Less than 67-fs pulse duration and 29-mW output power were measured. OCIS codes: (190.4975) Parametric processes; (190.4410) Nonlinear optics, parametric processes

The mechanical properties of injection molded short-fiber reinforced thermoplastic composite parts are highly dependent on the orientation distribution of the fibers. A simulation tool capable of predicting fiber orientation accurately as a function of mold design and processing conditions is required as the predicted fiber orientation capabilities in commercial software show large discrepancie...

One of the most famous methods to predict the stiffness of short fiber composites is micromechanical modeling. In this study, a Representative Volume Element (RVE) of a beech wood flour natural composite has been designed and the orientation averaging approach has been utilized to predict its stiffness tensor. The novelty of this work is in finding the proper fiber orientation distribution func...