In this study, we propose a highly sensitive multichannel pH sensor that is based on an optical-fiber pulse width modulation (PWM) technique. According to the optical-fiber PWM method, the received sensing signal's pulse width changes when the optical-fiber pH sensing-element of the array comes into contact with pH buffer solutions. The proposed optical-fiber PWM pH-sensing system offers a line...

A model to predict the effective stiffness of woven fabric composite materials is presented. Taking advantage of the inherent periodicity of woven fabric architecture, periodic microstructure theory is used at the mesoscale for the case of a two-phase heterogeneous material with multiple periodic inclusions. For plain weave fabrics, the representative volume element (RVE) is discretized into fi...

Using shape memory fibers to reinforce concrete is a novel concept in civil engineering. Pre-stretched are brought into and after activating the effect, compressive prestress state introduced. The present work investigates this method numerically. A brief introduction relevant behavior of alloys given. Fiber activation modeled by an empirical phase transition model. Simulations carried out appl...

In this paper we have demonstrated the emergence of an effective circular dichroism for fundamental mode in fiber resonators loop and ring types with optically active element embedded into loop/ring. Changing parameters resonator, element, or wavelength incoming field allows one to control value actually, increase optical activity element. It is shown that these can be used as working elements ...

The mechanics of the ischemic left ventricle during a complete cardiac cycle were simulated using a finite-element model accounting for the thick-walled ventricular geometry, the fibrous nature of the myocardial tissue, and the dependency of active muscle fiber stress on time, strain, and strain rate. Ischemia was modeled by disabling the generation of active stress in a region comprising appro...

This paper studies the rheological properties of a semi-dilute fiber suspension for short fiber reinforced composite materials processing. For industrial applications, the volume fraction of short fibers could be large for semi-dilute and concentrated fiber suspensions. Therefore, fiber-fiber interactions consisting of hydrodynamic interactions and direct mechanical contacts could affect fiber ...

In practice, the slab foundation is used widely in civil engineering. Besides concrete material, fiber applied more popular foundations. Determining ultimate load of foundations a complex problem due to relation soil-structure interaction (SSI) problem, which depends on both structures and subsoil characteristics. ANSYS finite element software reliable effective technique simulate structure mod...