Results 71 to 80 of about 143,386 (239)

Investigating the Dynamic Behavior of Gabbro Specimens With Echelon Joints

open access: yesEnergy Science &Engineering, Volume 13, Issue 7, Page 3620-3630, July 2025.
Investigating the dynamic behavior of rock specimens with echelon joints based on SHPB tests. ABSTRACT To reveal the influence of dynamic load on the dynamic damage behavior of jointed rock masses, split Hopkinson pressure bar (SHPB) system was employed to test platy gabbro samples with joint angles of 15°, 30°, 45°, 65°, and 75° at an impact pressure ...
Lei Xue   +5 more
wiley   +1 more source

Direct‐Write Printing of Multicolor Electroluminescent Films for Stretchable Display

open access: yesAdvanced Materials Technologies, Volume 10, Issue 10, May 22, 2025.
This work presents a mask‐free, fully printable alternating‐current electroluminescent (PACE) film using a direct‐write printing strategy. The multicolor PACE film, available in blue, green, and orange, reaches a thickness of ≈150 µm and achieves 180 cd m⁻2 at 6 V µm⁻¹.
Tianhao Yu   +4 more
wiley   +1 more source

Analysis of the Isothermal Elastohydronamic Lubrication of Inclined Double-roller Enveloping Hourglass Worm Drive

open access: yesJixie chuandong, 2017
To improve the lubrication performance,antiscuffing capacity and efficiency of worm gear pairs drive,the isothermal elastohydrodynamic lubrication( EHL) simplified model and isothermal line contact mathematical model are established based on meshing ...
Li Jinkuan   +3 more
doaj  

What to compare and how: Comparative transcriptomics for Evo-Devo. [PDF]

open access: yes, 2015
Evolutionary developmental biology has grown historically from the capacity to relate patterns of evolution in anatomy to patterns of evolution of expression of specific genes, whether between very distantly related species, or very closely related ...
Robinson-Rechavi, M.   +2 more
core   +2 more sources

Analysis of Thermal Elastohydronamic Lubrication of Inclined Double-roller Enveloping Hourglass Worm Drive

open access: yesJixie chuandong, 2018
To improve the lubrication performance,anti-scuffing capacity and efficiency of enveloping worm,the elastohydrodynamic lubrication( EHL) line contact model is established based on the research of meshing performance of inclined double-roller enveloping ...
Ou Yue   +4 more
doaj  

准平面二次包络环面蜗杆传动参数选择及优化

open access: yesJixie chuandong, 2007
The quasi-plane double enveloping hourglass worm is generated by a large diameter two-sided symmetry conical grinding wheel. The mathematical model of this hourglass worm including contact line equation, the thickness of sides tooth and the criterion ...
张光辉, 张太萍, 罗文军
doaj  

The research of hourglass worm dynamic balancing simulation based on SolidWorks motion

open access: yes, 2018
Hourglass worm is extensively used in industry due to its characteristic of heavy-load and a large reduction ratio. Varying sizes of unbalanced mass distribution appeared in the design of a single head worm.
Zhuangzhuang Wang   +3 more
semanticscholar   +1 more source

双锥面包络环面蜗杆截面齿形的一种计算方法

open access: yesJixie chuandong, 2008
The procedure of the establishment of the tooth flank equation of dual-cone enveloped hourglass worm was briefly introduced,and the tooth profile calculation method was derived in detail.The concepts of the tooth thickness coefficient and the target ...
王志刚, 王文合
doaj  

A Study on Hourglass-Worm Gearing Designed to Concentrate Surface Normals. A Gear Design Using an Hourglass-Worm Gearing Whose Worm Tooth Surface Is Generated by the Grinding Wheel with an Involute Helicoid.

open access: yesTRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1991
Displacement of the worm axis relative to the wheel axis under load is considered to be the helical movement rotating about the instantaneous axis. In order to avoid the influence of the displacement of gear axes under load upon tooth contact, the authors propose that the surface normals should be intersected perpendicular to the direction of helical ...
Shigeyuki SHIMACHI   +3 more
openaire   +2 more sources

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