Dynamically loaded structures made of thermoplastic polymers have been extensively exploited in several demanding industries. Due to the viscoelastic and thermal properties polymers, self-heating is generally inevitable, especially during dynamic deformations at high frequencies. Therefore, polyether ether ketone (PEEK), with its temperature resistance specific strength, a particularly ideal ca...

Source-gated transistors (SGTs) are thin-film devices which rely on a potential barrier at the source to achieve high gain, tolerance to fabrication variability, and low series voltage drop, relevant to a multitude of energy-efficient, large-area, cost effective applications. The current through the reverse-biased source barrier has a potentially high positive temperature coefficient, which may...

[1] The tidally driven vertical diffusivity in the abyssal ocean during the early Eocene (55 Ma) is investigated using an established tidal model. A weak tide is predicted in the Eocene ocean, except in the Pacific. Consequently, the integrated global tidal dissipation rate is a mere 1.44TW, of which 40% dissipate in the Pacific. However, due to a stronger abyssal vertical stratification the pr...

Abstract The parameters optimization of a viscous damper is carried out with cable-stayed bridge single cable plane and tower. Based on five four functions energy dissipation structure, the relationship between each function obtained. Finally, spatial distribution surface multi-parameter objective constructed, final result process shows that reasonable can effectively inhibit vibration structur...

this research is carried out to design and manufacturing of lathe vibration tool and their tests. firstly, one-dimensional vibration tool is designed and made of the bending vibration mode. one-dimensional vibration tool with half piezoelectric rings is considered to excite the bending mode of tool. structure of vibration tool is designed in abaqus software about 20 khz and then is made with re...

the paper numerically presents laminar forced convection of a nanofluid flowing in a duct at microscale. results were compared with both analytical and experimental data and observed good concordance with previous studies available in the literature. influences of brinkman and reynolds number on thermal and hydrodynamic indexes have been investigated. for a given nanofluid, no change in efficie...

background: deficiency of attention and concentration is one of great reasons of traffic incidents and it covers between 20 to 50 percent of events due to careless and mindedness. studies show that attention and concentration are considered as one of important cognitive components in safe driving. vibration is an important physical effect in all vehicles. till now has not been any organized stu...

The oscillatory dynamics of nanoelectromechanical systems (NEMS) is at the heart many emerging applications in nanotechnology. For common NEMS, such as beams and strings, formulated using a dissipationless wave equation derived from elasticity. Under harmonic ansatz, gives an undamped free vibration equation; solving this with proper boundary conditions provides eigenfunctions familiar standing...

Abstract Superelastic shape memory alloys (SMAs) are metallic two‐phase polycrystal alloys. The transformation between austenite and martensite phases allows superelastic SMAs unique hysteretic energy dissipation capacity, which is particularly interesting for the development of new‐type intelligent vibration control systems structures. However, in structural control, most vibrations occur high...

Nonwovens are a type of textile that possess wide range unique properties, such as lightweight and damping characteristics, which make them suitable for many applications in medicine engineering. In this study, the focus lies on mechanical response nonwovens multiphase porous layer excited by an underlying vibrating plate. The material properties characterized via laboratory measurements applie...