The elastic pair potential model of liquid crystal molecules was described. On the basis of Poniewiersky-Stecki statistical theory of the elastic constants of nematic liquid crystals, the effects of non-ideal rigid re...The elastic pair potential model of liquid crystal molecules was described. On the basis of Poniewiersky-Stecki statistical theory of the elastic constants of nematic liquid crystals, the effects of non-ideal rigid repulsion between molecules on the elastic constants of nematics were studied.展开更多
The effect of graphite particulate reinforcement on the resultant damping behaviour of ZA27 metal matrix composites (MMCs) has been investigated in an effort to develop a new functional material. The MMCs were process...The effect of graphite particulate reinforcement on the resultant damping behaviour of ZA27 metal matrix composites (MMCs) has been investigated in an effort to develop a new functional material. The MMCs were processed by a spray atomization and deposition technique. The damping capacity, as well as the relative dynamic modulus, was measured at frequencies of 1 and 4 Hz in the 30 to 200 degrees C temperature range. There exists a transformation point at 55 degrees C in the internal friction and temperature spectrum of the MMCs. It is shown from microstructural analysis that the damping capacity of ZA27 can be significantly improved by the addition of graphites particulates through spray deposition processing. Finally, the operative damping mechanism is discussed in light of the data obtained from characterization of microstructure and damping capacity.展开更多
文摘The elastic pair potential model of liquid crystal molecules was described. On the basis of Poniewiersky-Stecki statistical theory of the elastic constants of nematic liquid crystals, the effects of non-ideal rigid repulsion between molecules on the elastic constants of nematics were studied.
文摘The effect of graphite particulate reinforcement on the resultant damping behaviour of ZA27 metal matrix composites (MMCs) has been investigated in an effort to develop a new functional material. The MMCs were processed by a spray atomization and deposition technique. The damping capacity, as well as the relative dynamic modulus, was measured at frequencies of 1 and 4 Hz in the 30 to 200 degrees C temperature range. There exists a transformation point at 55 degrees C in the internal friction and temperature spectrum of the MMCs. It is shown from microstructural analysis that the damping capacity of ZA27 can be significantly improved by the addition of graphites particulates through spray deposition processing. Finally, the operative damping mechanism is discussed in light of the data obtained from characterization of microstructure and damping capacity.
