An overview of single and multiphase flows through woven and nonwoven fibrous materials is presented. A computational model for analyzing fluid flow through such media is described and sample computational results are presented. It is shown that by generating virtual geometries that resemble the microstructure of a fibrous material one can study the fluid and particle transport through such por...

Poly(L-lactic acid) (PLLA) fibers have been extensively studied for various applications. In this work, PLLA and poly(vinyl alcohol) (PVA) were prepared by coelectrospinning to form composite nonwoven materials. The structures and diameter distribution of the electrospun PLLA/PVA composite nonwovens were examined by atomic force microscopy (AFM) and scanning electronic microscope (SEM). The wet...

VistamaxxTM Specialty Elastomers are polyolefin elastomers with isotactic propylene crystallinity. These polymers contain a predominant (>80%) amount of propylene with isotactic propylene crystallinity, with the balance of the composition being ethylene and other αolefins. This new family of thermoplastic elastomers are highly elastic and exhibit excellent recovery from deformation. These polym...

The goals to be pursued by this paper are to highlight the effect of different ionising radiation methods, considered low temperature sterilisation, over protective clothing (surgical gowns) used in the operating theatre through microscopical examination. In order to investigate the influence of the radiation on the properties of nonwoven-based surgical gowns, two types of radiation (gamma and ...

In this paper, a stochastic model [5] for the turbulent fiber laydown in the industrial production of nonwoven materials is extended by including a moving conveyor belt. In the hydrodynamic limit corresponding to large noise values, the transient and stationary joint probability distributions are determined using the method of multiple scales and the Chapman-Enskog method. Moreover, exponential...

1. The structure of bone and the mechanisms for self-repair Bone is one of the most commonly transplanted tissues, with 2.2 million bone grafts performed annually worldwide (Tronci et al., 2013a). Surgeons face a diverse spectrum of clinical challenges in bone reconstruction, and this diversity reflects the variety of anatomic sites, defect sizes, mechanical stresses, and available soft tissue ...

Natural fibres such as jute were the forerunners of the man-made fibres used for centuries for making ropes and formanufacturing burlaps, sacks, hessian and carpet backing. But the use of jute products in civil engineering is relativelywidespread for such purposes as sand-bags for concrete curing, soil enrichment and protection. This research is concerned with the stabilization of fine sand usi...

Geotextile is one of the reinforcement materials adopted in many engineering structures. Conventional geotextiles have a limited effect due to insufficient friction strength between and soils. This paper proposes novel type geotextile with stitched transverse ribs improve effect. A series large-scale direct shear tests been conducted, improvement characteristics conventional geotextiles, geogri...