17 research outputs found
Pine Beams Retrofitted with FRP and Poplar Planks: Mechanical Behavior
The paper presents an experimental analysis of the bending behavior of pine beams
(Pinus Sylvester) retrofitted with fiber reinforced plastic (FRP) and poplar planks used as external
covering. Poplar wood was chosen because of its rapid growth in planted forests, its homogeneity
and attributes for sustainable local development, and high CO2 absorption rate. Vibration tests
were also conducted in order to evaluate the stiffness in a non-destructive way and compare it
with that obtained by means of the destructive tests. Three types of reinforcement were compared,
namely: basalt fabric (FB), carbon fabric (FC) and carbon laminate (LC). In addition, some pine beams
were reinforced only with poplar planks and used as control specimens in order to evaluate the
improvement provided by the FRP. It was observed that a strong delamination preceded the final
breakage of beam. Moreover, the results indicated that stiffness is provided mainly by the poplar
plank and not by the FRP, as was expected.This work was made possible thanks to the financial support of the COMPOP_Timber project “Desarrollo
de productos de ingeniería elaborados a base de tablones y chapas de chopo con inserciones de material compuesto
para su uso en construcción”, BIA2017-82650-R
Parallel Solution of the Neutron Diffusion Equation with the Domain Decomposition Method on a Transputer Network
ANALYSIS OF THE EFFECTS OF SPINE STABILIZATION EXERCISES USING A WHOLE BODY TILT DEVICE ON MUSCLE FORCES IN THE SPINE
Study on the Effect of Aligned Cellulose Film to the Performance of Electro-Active Paper Actuator
Future evolution of automated demand response system in smart grid for low-carbon economy
Groundwater vulnerability risk assessment in south Darb El Arbaein, south Western Desert
Metal mesh filters based on Ti, ITO and Cu thin films for terahertz waves
In this study, we have investigated the spectral performance of resonant terahertz (THz) bandpass filters which were produced from thin films with a metal-mesh shape. The aforementioned filters were fabricated from titanium, copper and indium tin oxide thin films on fused silica substrates by UV lithography with an array of cross-shaped apertures. Since the mesh period, cross-arm length and its width specify the spectral characteristics of the filters, we were able to reveal the performance of these filters experimentally using both a THz time domain spectrometer and a Fourier transform infrared spectrometer. A commercial electromagnetic simulation software, CST microwave studio, was used to verify the experimental data. The transmission of the filters are in the range 20–55 % at their relevant center frequencies. To our knowledge this study is the first to show that fabricated patterns based on ITO thin films can be used to filter THz radiation.TUBITAK (114F091