Abstract: According to standard testing methods, predrying of portland cement (PC) usually is required as a preconditioning step before the determination of carbonation. However, the hydration process, the hydration products, and ...

Abstract: At micro- and nanoscales, the gas pressure load is generally simulated by the thermal motion of gas molecules. However, the pressure load can hardly be produced or controlled accurately, because the effects of the wall ...

Abstract: This technical brief is an experimental study, which used a water tunnel to investigate the fluidelastic instability of tube bundles with asymmetric stiffness. The natural frequency ratios (streamwise/transverse) of the ...

Abstract: As an important safety equipment in nuclear system, the passive residual heat removal heat exchanger (PRHR HX) with C-tube is responsible for timely removing heat from the reactor core in accident. A C-tube heating device ...

Abstract: Inspired by natural plants, thermoresponding hydrogel (TRH) structures have been designed to trigger mechanical instability with fast actuation. Tough Caalginate/poly(Nisopropylacrylamide) (PNIPAM) hydrogel has been ...

Abstract: Fluidelastic instability (FEI) is the most harmful vibration mechanism for heat exchangers. Due to the inevitable manufacturing precision and assembly error, natural frequencies of tubes are not equal in the ideal condition. ...

Abstract: Thin glassfiber/epoxycomposite sheets filled with multiwalled carbon nanotubes (MWCNTs) are manufactured to make lightweight honeycomb sandwich microwave absorbers. A multilayered sandwich structure of thin nanocomposite ...

Abstract: Compared to robots and devices made of rigid components, soft robots and flexible devices driven by soft active materials possess various advantages including high adaptability under extreme environment and compatibility ...

Abstract: Opening holes in construction structures is used often to allocate electrical or ventilating lines. However, it may result in stress concentration and hence the reduction in mechanical properties. In order to manage these ...

Abstract: Scar structures of natural animals can reinforce the wounds both mechanically and biologically to maintain the functions of the injured muscle and skin. Inspired by the scar structure, we present a dielectric elastomer ...