Optical fibers containing multiple cores are widely regarded as the leading solution to the optical communications capacity crunch. The most prevalent paradigm for the design and employment of multi-core fibers relies on the suppression of direct coupling of optical power among cores. The cores, however, remain mechanically coupled. Intercore, opto-mechanical cross-talk, among cores that are ot...

The use of maximum velocity of shortening (Vmas) as an index of contractility has been based on the assumption that Vraox of muscle fibers is equivalent t° Vmax of the contractile element. It is shown here that such equivalence applies to the two-element model of skeletal muscle but not to three-element models of cardiac muscle. Analysis of published data in terms of the Voigt and Maxwell three...

A method based on coherent Rayleigh scattering distinctly evaluating temperature and strain is proposed and experimentally demonstrated for distributed optical fiber sensing. Combining conventional phase-sensitive optical time-domain domain reflectometry (ϕOTDR) and ϕOTDR-based birefringence measurements, independent distributed temperature and strain profiles are obtained along a polarization-...

Abstract: This paper presents the results of experimental determination of fiber bed permeability variation with porosity. Flow measurement experiments were designed to measure fiber mat permeability for fiber beds with various fiber volume fractions. Woven fiberglass, chopped fiberglass, and carbon fiber mats were used as reinforcements. The effects of reinforcement type and porosity on fiber ...

Abstract This article considers a thin-walled hollow cylinder, which is composed of fibrous and swellable hyperelastic material. The fibers are arranged in two families they taken to be parallel within each fiber family. also assumed mechanically equivalent symmetrically disposed the ground substance At instant homogeneous swelling, material incompressible. studies interplay orientation, mechan...

Let M be a closed smooth manifold. We will denote the group of all selfdiffeomorphisms of M , with the smooth topology, by DIFF (M). By a smooth bundle over X, with fiber M , we mean a locally trivial bundle for which the change of coordinates between two local sections over, say, Uα, Uβ ⊂ X is given by a continuous map Uα ∩ Uβ → DIFF (M). A smooth bundle map between two such bundles over X is ...

Sub-meter distributed optical fiber sensing based on Brillouin optical time-domain analysis with differential pulse-width pairs (DPP-BOTDA) is combined with the use of optical pre-amplification and pulse coding. In order to provide significant measurement SNR enhancement and to avoid distortions in the Brillouin gain spectrum due to acoustic-wave pre-excitation, the pulse width and duty cycle o...

An analytical approach with the help of numerical simulations based on the equivalent constraint model (ECM) was proposed to investigate the progressive failure behavior of symmetric fiber-reinforced composite laminates damaged by transverse ply cracking. A fracture criterion was developed to describe the initiation and propagation of the transverse ply cracking. This work was also concerned wi...