Results 71 to 80 of about 1,199 (210)

Variable-Stiffness Targeted Energy Transfer for Wide Range Torsional Vibration Mitigation

Machines
Torsional vibrations represent a significant dynamic phenomenon in rotating mechanical systems and are often associated with increased dynamic loading, fatigue damage, noise generation, and reduced operational reliability.
Lucia Žuľová, Robert Grega, Jozef Krajňák, Matej Urbanský   +3 more
doaj   +1 more source

A Versatile‐Designable Framework for Active and Programmable Shape‐Morphing Soft Matter Systems: From Inverse Design to Closed‐Loop Control

Advanced Science, EarlyView.
A versatile framework integrates addressable electrothermal actuation and strain‐constraint mechanisms to construct programmable shape‐morphing soft matter systems. By combining an analytical inverse design strategy for high‐fidelity 3D surface reconstruction with deep learning‐based closed‐loop control, this approach enables zero‐energy shape locking,
Kai Liu, Peiling Xie, Ruitong Song, Banghan Liu, Rui Guo, Jiu‐an Lv   +5 more
wiley   +1 more source

一种分析裂纹对弧齿锥齿轮扭转啮合刚度影响的方法

Jixie chuandong, 2011
Based on the space meshing theory,the spiral bevel gear tooth surface equation and meshing reference point are established.The influence law of crack position and crack depth on the torsional mesh stiffness of gear is investigated by using the FEM.On ...
冯刚, 王三民, 李彦彬
doaj  

Research on the effects of curvature and shear keys on torsional stiffness and interfacial stress of segmented U-shaped curved bridge

Scientific Reports
This paper investigates the segmental U-shaped curved bridge of Bogotá Metro Line 1 project in Colombia. The effects of curvature radius (R) of the bridge and shear keys (number, arrangement, and size) at inter-segment bonding joints on the bridge’s ...
Shuai Zhang, Chuang Wang, Hongchun Qu, Wenjie Xu, Lin Xiao, Qingsong Fan, Chuanbiao Wang, Yanqun Han   +7 more
doaj   +1 more source

Kresling Origami‐Based Metamaterial Robot for Dynamic Electromagnetic Control

Advanced Science, EarlyView.
A reconfigurable metamaterial system integrates deformable origami units with high‐permittivity ceramic plates. Pneumatic switching between structural states alters local resonance conditions, enabling dynamic radar stealth and adaptive microwave reflection for mobile communication.
Xinxi Zeng, Long Zhou, Shaojie Xi, Yixuan Gao, Desheng Pan, Chaoyang Sun, Haoxin Sun, Xian Wang, Lingyun Qian, Peipei Li, Pengfei Zhu, Bo Li, Jiang Luo, Ji Zhou   +13 more
wiley   +1 more source

Cementless long-stem fixation in periprosthetic clamshell fracture: a biomechanical investigation

Frontiers in Bioengineering and Biotechnology
ObjectiveTo investigate the biomechanical strength of cementless long-stem fixation for the treatment of periprosthetic clamshell fracture.MethodsEighteen Sawbones artificial femur models were used and divided into three groups.
Lingqi Zhu, Li Xie, Mingchang He, Jianyun Miao, Liang Zhou, Lianshui Huang, Hui Liu, Wei Xie, Wenliang Zhai   +8 more
doaj   +1 more source

Mechanical Flexibility Enables DNA Origami to Overcome Steric Confinement in Mucus

Advanced Science, EarlyView.
Mechanical flexibility is introduced as a design parameter to enhance nanocarrier transport in mucus. Using DNA origami, flexibility is decoupled from size, shap and surface chemistry, revealing improved passage through confined hydrogel networks. While surface passivation reduces aggregation, flexibility further boosts transport, offering a general ...
Matteo Tollemeto, Emily Tsang, Marie Karen Tracy Hong Lin, Luca Mannino, Kurt V. Gothelf, Anja Boisen   +5 more
wiley   +1 more source

Bio‐Inspired Bidirectional Winding Origami With Programmable Modular Reconfigurability and Scalability

Advanced Science, EarlyView.
A bio‐inspired bidirectional‐winding origami platform enables scalable and programmable deployable structures. Double axial folding inspired by earwig hindwings and Flasher‐based hybridization create modular multilayer architectures with diverse attainable winding angles under fixed boundary conditions.
Wenyao Zhang, Chunlong Wang, Mingli Liu, Chuang Shi, Hongwei Guo, Rongqiang Liu   +5 more
wiley   +1 more source

Application of Concrete Segment Panels for Reduction of Torsional Vibration Responses of Girder Bridges

MATEC Web of Conferences, 2015
The dynamic flexural behaviour of railway bridges is influenced by the torsional behaviour, and the flexural response tends to be amplified as the flexural natural frequency (the 1st vibrational mode) and torsional frequency (the 2nd vibrational mode ...
Kwark Jong-Won, Kang Jae-Yoon, Park Sung-Yong, Kim Keun-Taek   +3 more
doaj   +1 more source

Ductile B2 Intermetallics‐Driven Strength‐Ductility Synergy in Heterolaminated Multi‐Principal Element Alloys

Advanced Science, EarlyView.
Intrinsic phase toughening transforms a brittle B2 intermetallic into a plastically deformable, load‐bearing phase, while a heterogeneous laminated architecture suppresses strain localization and interface cracking. The synergy between ductile intermetallics and mesoscale heterogeneity establishes a general design strategy for breaking the long ...
Lu Yang, Feilong Jiang, Qiming Zhuang, Dingshan Liang, Jiasi Luo, Kangjie Chu, Junhua Luan, Zengbao Jiao, Robert O. Ritchie, Fuzeng Ren   +9 more
wiley   +1 more source