Topic
Pressure angle
About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.
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15 Oct 2012
TL;DR: A liquid droplet sitting on a hydrophobic surface with a cosine wave-like square-array pattern in the Wenzel state is simulated by using the Surface Evolver to determine the contact angle.
Abstract: A liquid droplet sitting on a hydrophobic surface with a cosine wave-like square-array pattern in the Wenzel state is simulated by using the Surface Evolver to determine the contact angle. For a fixed drop volume, multiple metastable states are obtained at two different surface roughnesses. Unusual and non-circular shape of the three-phase contact line of a liquid droplet sitting on the model surface is observed due to corrugation and distortion of the contact line by structure of the roughness. The contact angle varies along the contact line for each metastable state. The maximum and minimum contact angles among the multiple metastable states at a fixed viewing angle correspond to the advancing and the receding contact angles, respectively. It is interesting to observe that the advancing/receding contact angles (and contact angle hysteresis) are a function of viewing angle. In addition, the receding (or advancing) contact angles at different viewing angles are determined at different metastable states. The contact angle of minimum energy among the multiple metastable states is defined as the most stable (equilibrium) contact angle. The Wenzel model is not able to describe the contact angle along the three-phase contact line. The contact angle hysteresis at different drop volumes is determined. The number of the metastable states increases with increasing drop volume. Drop volume effect on the contact angles is also discussed.
32 citations
TL;DR: In this paper, a methodology is proposed to improve the adjustability of the spiral bevel gear assembly by modifying the radial motion of the head cutter in the machine plane of the hypoid generator.
32 citations
TL;DR: In this paper, a unified approach for the analytical design of three-dimensional cam follower systems is presented, where generalized expressions for various cam parameters, such as the equation of the conjugate cam profile, the pressure angle at the point of contact and locations of the cutter and the grinding wheel axes are derived.
Abstract: The paper presents a unified approach for the analytical design of three-dimensional cam follower systems. Generalized expressions for various cam parameters, such as the equation of the conjugate cam profile, the pressure angle at the point of contact and locations of the cutter and the grinding wheel axes are derived. The effectiveness of the proposed method is illustrated by applying it to camoids, three-dimensional cylindrical cams with translating and oscillating followers, globoidal cams with oscillating followers and two-dimensional disk cams with translating and oscillating roller followers.
32 citations
TL;DR: In this article, the authors proposed a systematic method to generate the tooth profile of circular-arc elliptical gears without tooth undercutting and pointed teeth, which can be used as an oil pump.
32 citations
TL;DR: In this article, the single tooth stiffness of an involute spur gear was measured experimentally, and an experimental technique was proposed to investigate the effects of drive side pressure angle on the stiffness.
31 citations