Results 91 to 100 of about 150,301 (303)

Research on Correction Algorithms of Tooth Profile Error of Cycloidal Bevel Gear Formate Gear

open access: yesJixie chuandong, 2020
Aming at the problem of correction algorithms of tooth profile errors of Oerlikon cycloidal bevel formate gear, by using the vector operation method, the geometric model of the tooth surface of gear is established.
Zhiyong Wang   +3 more
doaj  

Pitting damage levels estimation for planetary gear sets based on model simulation and grey relational analysis [PDF]

open access: yes, 2011
The planetary gearbox is a critical mechanism in helicopter transmission systems. Tooth failures in planetary gear sets will cause great risk to helicopter operations.
Gu, Fengshou   +3 more
core  

Comparative and functional anatomy of masticatory muscles and bite force in opossums (Didelphimorphia, Didelphidae)

open access: yesThe Anatomical Record, EarlyView.
We describe the functional anatomy of masticatory muscles in nine opossums, finding a generalized anatomical pattern with differences related to skull morphology. Variation in quantitative myological data and estimated bite force was mostly related to size, and the increase in bite force supports dietary diversification associated with size increase ...
Juann A. F. H. Abreu, Diego Astúa
wiley   +1 more source

Influence of trochoidal interference of helical gears on tooth surface strength (Effect of helix deviation, crowning and tip relief)

open access: yesNihon Kikai Gakkai ronbunshu, 2016
It is of practical importance to accurately evaluate the influence of tooth surface deviation and modification on the tooth surface strength of transmission gears. In this study, gear surface fatigue endurance tests were carried out with pairs of helical
Masatoshi YOSHIZAKI
doaj   +1 more source

Tooth Surface Error Correction for Face-Hobbed Hypoid Gears [PDF]

open access: yes, 2009
Face-hobbing is a continuous generating process employed in manufacturing spiral bevel and hypoid gears. Due to machining dynamics and tolerances of machine tools, exact tooth surface geometry may not be obtained from the machining process using ...
Qi Fan
core   +1 more source

The relationship between form and function of the carnivore mandible

open access: yesThe Anatomical Record, EarlyView.
Abstract Dietary morphology diversified extensively in Carnivoraformes (living Carnivora and their stem relatives) during the Cenozoic (the last 66 million years) as they evolved to capture, handle, and process new animal and plant diets. We used 3D geometric morphometrics, mechanical advantage, and finite element analysis to test the evolutionary ...
Charles J. Salcido, P. David Polly
wiley   +1 more source

Inter‐microscope comparability of dental microwear texture data obtained from different optical profilometers: Part I Reproducibility of diet inference using different instruments

open access: yesThe Anatomical Record, EarlyView.
Abstract Dental microwear texture analysis (DMTA) has become a well‐established method for dietary inference and reconstruction in both extant and extinct mammals and other tetrapods. As the volume of available data continues to grow, researchers could benefit from combining published data from various studies to perform meta‐analyses.
Daniela E. Winkler, Mugino O. Kubo
wiley   +1 more source

Research on noise reduction of drive axle hypoid gear based on tooth surface mismatch modification

open access: yesAdvances in Mechanical Engineering
In order to reduce the transmission noise of drive axle hypoid gear, a method of tooth surface mismatch modification was proposed. Firstly, on the basis of establishing the grinding mathematical model of hypoid gear with cutter tilt, the theoretical ...
Shaowu Nie, Jinyu Chen, Shaohang Liu
doaj   +1 more source

Investigation on the sampling size optimisation in gear tooth surface measurement using a Co-ordinate Measuring Machine [PDF]

open access: yes, 2004
Co-ordinate Measuring Machines (CMMs) are widely used in gear manufacturing industry. One of the main issues for contact inspection using a CMM is the sampling technique.
Cheng, K, Webb, D, Gao, CH
core   +1 more source

Tooth row allometry in domestic rabbits and nondomestic lagomorphs: Evidence for a decoupling of body and tooth row size changes in evolutionary time

open access: yesThe Anatomical Record, EarlyView.
Domestic rabbits of different body sizes differ disproportionately in the length of their tooth row or the length of their diastema. Abstract In various domestic mammals, smaller breeds tend to have proportionally larger teeth, whereas this is not a universal trend across mammals.
Ursina L. Fasciati   +3 more
wiley   +1 more source

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