Results 91 to 100 of about 80,742 (298)

Dynamics of early planetary gear trains [PDF]

A method to analyze the static and dynamic loads in a planetary gear train was developed. A variable-variable mesh stiffness (VVMS) model was used to simulate the external and internal spur gear mesh behavior, and an equivalent conventional gear train ...
August, R., Frater, J. L., Kasuba, R., Pintz, A.   +3 more
core   +1 more source

Time-varying Meshing Stiffness Calculation of Spur Gears with Asymmetric Spalling Defects

International Journal of Mechanical and Electrical Engineering
Gear systems are subjected to repeated loads during long-term operation, and factors such as insufficient lubricant to increase friction between gears, resulting in elevated temperatures and wear, are highly susceptible to tooth spalling. Tooth spalling is a common form of failure in gear failure.
Wenqiang Han, Hanjun Jiang
openaire   +1 more source

Calculation and Analysis of Modified Gear Time-varying Meshing Stiffness based on Matlab

Jixie chuandong, 2022
Considering the real involute and transition curve equation of gears，an accurate model of gears is conducted. The deformation of modified gear is deduced and calculated by Weber energy method. The mapping relationships of load angle βj，pressure angle αk，rotation angle tan αk and coordinate XMj of load point are deduced.
Dongjiang Cao, Peng Shang, Yang Zhao
openaire   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

Time-Varying Meshing Stiffness Calculation and Dynamics Simulation of Multi-Spalling Gear

Machines
Spalling alters a gear’s time-varying meshing stiffness (TVMS), thereby affecting its vibration characteristics. However, most studies focus on single-spalling gears and overlook the possibility of multi-spalling gears. Additionally, because most spalls are irregular, traditional analytical models neglect the torsional effects that are caused by ...
Xiangxi Kong, Ye Yuan, Shuai Sun, Yi Xin, Qiang Meng   +4 more
openaire   +2 more sources

Analytical Crack Propagation Scenario For Gear Teeth And Time-Varying Gear Mesh Stiffness

, 2012
In this paper an analytical crack propagation scenario is proposed which assumes that a crack propagates in the tooth root in both the crack depth direction and the tooth width direction, and which is more reasonable and realistic for non-uniform load distribution cases than the other presented scenarios.
Mohammed, Omar D., Rantatalo, Matti, Kumar, Uday   +2 more
openaire   +1 more source

3D‐Printed Porous Hydroxyapatite Formed via Enzymatic Mineralization

Advanced Functional Materials, EarlyView.
Bone combines lightness, strength, and the ability to heal, inspiring new materials design. This work introduces a room‐temperature, enzyme‐mediated 3D printing method to create porous hydroxyapatite scaffolds. The process avoids energy‐intensive sintering, preserves bioactivity, and allows control over porosity and mineralization.
Francesca Bono, Anna Puiggalí‐Jou, Greta Cocchi, Mariangela Miccoli, Katharina Maniura‐Weber, Marcy Zenobi‐Wong, Esther Amstad   +6 more
wiley   +1 more source

Classical and all-floating FETI methods for the simulation of arterial tissues

, 2014
High-resolution and anatomically realistic computer models of biological soft tissues play a significant role in the understanding of the function of cardiovascular components in health and disease.
Augustin, Christoph M., Holzapfel, Gerhard A., Steinbach, Olaf   +2 more
core   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

Advanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Bridging the computational gap between mesoscopic and continuum modeling of red blood cells for fully resolved blood flow

, 2019
We present a computational framework for the simulation of blood flow with fully resolved red blood cells (RBCs) using a modular approach that consists of a lattice Boltzmann solver for the blood plasma, a novel finite element based solver for the ...
Chopard, Bastien, Kotsalos, Christos, Latt, Jonas   +2 more
core   +2 more sources