Results 51 to 60 of about 2,188 (260)

齿轮时变啮合刚度改进计算方法

open access: yesJixie chuandong, 2010
The time-varying meshing stiffness of gear is the most important parameter in the dynamic equation of the gear systems,but now the most usually way of obtaining the parameter is the finite element methods and it’s very low efficiency.The Ishikawa formula
李亚鹏, 孙伟, 魏静, 陈涛
doaj  

Tough and Skin‐Free Porous Polyelectrolyte Complex Hydrogels via Salt‐Induced Aqueous Phase Separation

open access: yesAdvanced Functional Materials, EarlyView.
Controlling counterion exchange rate during aqueous phase separation enables the formation of skin‐free, homogeneously porous polyelectrolyte complex hydrogels by suppressing kinetically trapped skin layers and macrovoids. The resulting hydrogel networks exhibit exceptional toughness (∼15 MJ·m−3) and enable 3D (bio)printing and post‐functionalization ...
Adrivit Mukherjee   +7 more
wiley   +1 more source

Nonlinear Frequency Response Analysis of Herringbone Gear Pair based on Incremental Harmonic Balance Method

open access: yesJixie chuandong, 2021
The torsional dynamics model of herringbone gear pair considering time-varying meshing stiffness, constant backlash, dynamic backlash, static transmission error and external dynamic excitation is established. The frequency response characteristics of the
Libang Wang, Hao Dong
doaj  

Meniscus‐Guided Soft‐Lithographic Assembly of Grid‐Type Molecular Martensite Films for Single‐Crystal‐Like Actuation

open access: yesAdvanced Functional Materials, EarlyView.
A meniscus‐guided microtransfer molding strategy enables scalable fabrication of grid‐type molecular martensite films with b‐axis‐correlated preferential texture. Sequential growth across microchannel intersections creates structurally continuous grids and robust thermoelastic actuation (∼11% strain, > 50 cycles, maximum force density: 7.1 × 109 N m−3).
Sooyeon Ra   +15 more
wiley   +1 more source

Sulfation‐Tunable Peptide‐Glycosaminoglycan Hydrogels for Hematopoietic Stem and Progenitor Cell Expansion

open access: yesAdvanced Functional Materials, EarlyView.
Co‐assembly of rationally designed glycosaminoglycan‐binding peptides with sulfated glycosaminoglycans yields supramolecular hydrogels with tunable mechanics and matrix‐mediated cytokine retention. The glycosaminoglycans thereby act as cofactors, driving a coil‐to‐β‐sheet transition that triggers gelation.
Shirel Veretnik   +8 more
wiley   +1 more source

Solving Method for the Tooth Mesh Stiffness based on Transmission3D

open access: yesJixie chuandong, 2021
A method is proposed to calculate the tooth meshing stiffness based on Transmission3D (T3D). FE/CM model is built to ensure the solving accuracy and efficiency.
Weixia Li, Tao Zhang
doaj  

Bioinspired Co‐Assembly Enables Multiscale Architected Hydrogels for 3D Printing With Integrated Antibacterial and Bioactive Functions

open access: yesAdvanced Functional Materials, EarlyView.
A multicomponent supramolecular hydrogel integrating cell‐adhesive and antibacterial peptides within an alginate‐cellulose nanofibril matrix is developed. Peptide co‐assembly simultaneously strengthens the hydrogel network, improves extrusion printability, and imparts cell‐adhesive and antibacterial functions, offering a versatile platform for ...
Mor Tsuriano‐Zernichov   +4 more
wiley   +1 more source

Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite

open access: yesAdvanced Functional Materials, EarlyView.
The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen   +16 more
wiley   +1 more source

Research of Internal Excitation of Helical Gear Meshing Transmission

open access: yesJixie chuandong, 2018
The internal excitation of gear meshing transmission is the key factor that causes gear vibration and noise. Taking a pair of constant meshing helical gears in an 8-speed automatic transmission as the research object,the internal excitation of meshing ...
Yue Huijun   +3 more
doaj  

Research on the Time-varying Meshing Stiffness Algorithm of Spur Gears with Large Tooth Number Cracks

open access: yesJixie chuandong, 2023
For spur gears with more than 41 teeth, based on the geometry of cutting teeth and the principle of gear meshing, the difference between the starting point of the involute profile and the intersection of the involute and the base circle is clarified, and
Jiao Wei, Xu Kejun, Qin Haiqin
doaj  

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