With the continuous development of national economy, big gear was widely applied in metallurgy and mine domains. So, big gear plays an important role in above domains. In practical production, big gear abrasion and breach take place often. It affects normal production and causes unnecessary economic loss. A kind of intelligent test method was put forward on worn big gear mainly aimed at the big...

In-line skating injuries and protective gear use were explored in a sample of college students (n = 217). A minority of respondents wore protective gear. One third of skaters had experienced at least one minor injury, and a smaller percentage had experienced fractures or head injuries. Most minor injuries occurred during the first 1-2 times skating, while more serious injuries tended to occur a...

Gear drives are one of the most widely used transmission system in many machinery. Sound signals of a rotating machine contain the dynamic information about its health conditions. Not much information available in the literature reporting suitability of sound signals for fault diagnosis applications. Maximum numbers of literature are based on FFT (Fast Fourier Transform) analysis and have its o...

In this research paper, focusing on the basic variables of gear modeling process and setting its dimensions to see which gears are capable withstanding transmission operations rigidity was done. Because one most prominent mechanics is gears, as types numerous common, helical gear. The widely used widespread in mechanical fields due increase contact area during interlock process, reduces noise r...

Landing gear is one of the critical subsystems of an aircraft. The need to design landing gear with minimum weight, minimum volume, high performance, improved life, and reduced life cycle cost have posed many challenges to landing gear designers and practitioners. Further, it is essential to reduce the landing gear design and development cycle time while meeting all the regulatory and safety re...

Lightweight gears have the potential to substantially contribute green economy demands. However, gear lightweighting is a challenging problem where various factors, such as definition of optimization and parameterization design space, must be handled achieve targets meet performance criteria. Recent advances in FE-based contact analysis demonstrated that using hybrid FE–analytical models can of...