Carbon nanotubes (CNTs) have attracted a great deal of interest in the development of high-performance engineering composites, due to their exceptional physical, mechanical, electronic and thermal properties. Incorporation of CNTs into polymer has shown great improvements in the functional property, however, the enhancement of the mechanical property was insignificant compared with that of micr...

natural vibration analysis of plates represents an important issue in engineering applications. in this paper, a new and simplify method for vibration analysis of circular and rectangular plates is presented. the design of an effective robust controller, which consistently attenuates transverse vibration of the plate caused by an external disturbance force, is given. the dynamics of the plate i...

The fabrication of porous copper with ultrahigh porosity by adding 90% spacer content was an unsolved technical problem in the field. In this study, green compacts placed on a layer wire mesh during decomposition process needlelike carbamide as space holder volume up to successfully conducted fabricate nondestructive copper. Compared directly alumina plate, use support crucial for manufacturing...

In this study, we present the results of electron-beam welding joints with 304-L stainless steel and copper. The influence beam’s power on structures mechanical properties welded was studied; experiments were realized at a beam deflection 0.3 mm to Cu plate powers 2400, 3000, 3600 W. phase compositions obtained studied by using X-ray diffraction (XRD); microstructure chemical composition invest...

Application of a systems approach to computational materials design led to the theoretical design of a transformation toughened ultratough high-strength plate steel for blast-resistant naval hull applications. A first prototype alloy has achieved property goals motivated by projected naval hull applications requiring extreme fracture toughness (Cv > 85 ft-lbs or 115 J corresponding to KId ≥ 200...

Multipactor discharges are a resonant condition in which electrons impact a surface in phase with an alternating electric field. The discharge is sustained by electron multiplication from secondary emission. As motivation, multipactor discharges can adversely affect many different rf systems in vacuum, and this work provides an improved general understanding of multipactor and gives promising r...

In the inversion of land surface temperature (LST) from satellite data, obtaining the information on land surface emissivity is most challenging. How to solve both the emissivity and the LST from the underdetermined equations for thermal infrared radiation is a hot research topic related to quantitative thermal infrared remote sensing. The academic research and practical applications based on t...

In this work, the examination of an experimental air-cooled photovoltaic-thermal module is introduced. Two different shapes fin fixed to copper absorber plate are examined for classical unit collector. Vertical and louver-shaped fins (with same surface area) investigated thermally evaluated in study. The experiments aimed increase temperature difference between inlet outlet air reach high therm...

Ultrasonic complex vibration welding of same and different metal specimens and structures of the welded area are studied using several complex vibration welding systems, scanning and transmission electron microscopes (SEM and TEM). Ultrasonic welding can weld various metal directly using vibration and static clamping pressure. The welding area is limited very narrow layer and can weld different...