Results 41 to 50 of about 67,803 (300)

Novel piezoelectric crawling robot with multiple degrees of freedom

AIP Advances, 2021
Traditional ultrasonic motors can usually produce either linear or rotational motion. Piezoelectrically driven structures with multiple degrees of freedom require two or more ultrasonic motors, and the manufacturing process is associated with some ...
Ruikun Niu, Yu Guo
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Trajectory Control Algorithm for Open Inner Box Nine-bar Two-DOF Mechanism

Jixie chuandong, 2019
With the extensive application of nine-bar two-DOF mechanism in light industry, packaging machinery and other equipment, it is particularly important to study the tracing algorithm to achieve the predetermined trajectory.
Yin Mengjuan Nie Songhui Cao Zheng
doaj  

Parametrical Investigation of Piezoelectric Energy Harvesting via Friction-Induced Vibration

Shock and Vibration, 2020
In this work, piezoelectric energy harvesting performance via friction-induced vibration is investigated numerically. A one-degree-of-freedom friction system with a piezoelectric element is proposed, to study the piezoelectric energy harvesting via ...
D. W. Wang, M. X. Liu, W. J. Qian, X. Wu, Q. Ma, Z. Q. Wu   +5 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Experimental study on the influence of centroid position of wind turbine section on flutter

Heliyon
Aiming at the large aspect ratio characteristics of large wind turbines, it is easy to cause irreversible damage due to flutter during operation. A two-degree-of-freedom (plunge and pitch) flutter test bench was built using the time domain and frequency ...
Qi Zheng, Zhiying Gao, Baozhong Zhao, Yefei Bai, Rina Su, Xiaoliang Han, Feng Zhao, Xueqing Dong, Jianwen Wang   +8 more
doaj   +1 more source

A lightweight shoulder prosthesis with antagonistic impact-absorbing hybrid actuation for bimanual activities of daily living

Advances in Mechanical Engineering, 2016
In developing a shoulder prosthesis, in addition to appropriate payload and range of motion under the constraints of weight and shape, impact absorption is very important for safe use. Hybridization of two different actuators (pneumatic elastic actuators
Masashi Sekine, Kouki Shiota, Kahori Kita, Akio Namiki, Wenwei Yu   +4 more
doaj   +1 more source

Modeling and Control of Two Degree of Freedom Bionic Foot

MATEC Web of Conferences
Many people are affected by conditions like stroke, spinal cord diseases, cerebral palsy, and nerve injuries, leading to impaired leg function. Bionic foot assist in maintaining stability and posture, offering vital aid to those with mobility issues for ...
Syed Salman Shah, Muhammad Akif, Muhammad Arsalan, Syed Humayoon Shah, Taimoor Hassan, Abid Imran   +5 more
semanticscholar   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

Advanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink, Saba Saood, Peter Schweizer, Jörg Neugebauer, Gerhard Dehm   +4 more
wiley   +1 more source