Results 31 to 40 of about 1,707 (203)

Autonomous Locomotion of Tensegrity Structure on Low‐Temperature Surfaces

Advanced Robotics Research, EarlyView.
A low‐temperature responsive tensegrity structure (LRTS) is constructed by integrating low‐responsive temperature liquid crystal elastomer (LCE) cables, nonresponsive cables, and stiff rods. The low phase transition temperature of LCE is achieved by introducing a new liquid crystal mesogen.
Changyue Liu, Kai Li, Tianyu Li, Zixuan Wang, Jiping Yang, Zhijian Wang   +5 more
wiley   +1 more source

Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

Advanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

Numerical and Experimental Investigations of Prestressed Steel-Concrete Beams

Железобетонные конструкции
The idea of prestressing in reinforced concrete structures is widely used. Peculiarities of stress-strain state of prestressed reinforced concrete elements are described in many scientific articles, recommendations on prestressing methods are developed ...
F. S. Zamaliev, D. Yu. Filippov
doaj   +1 more source

Strains, thermal relaxation and strength loss of prestressing steel at fire temperature. Guidance on the practical use of the Eurocode 2-1-2 model [PDF]

Archives of Civil Engineering
The paper gives guidance on the use of the EC2-1-2 model of degradation of the mechanical properties of prestressing steel at high temperature useful for estimating the loss of prestressing force in members exposed to fire.
Robert Kowalski, Julia Wróblewska
doaj   +1 more source

3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications

Advanced Robotics Research, EarlyView.
Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun, Jan Petrš, Omar Aloui, Dario Floreano   +3 more
wiley   +1 more source

An Investigative Study for the Seismic Performance of Composite-Reinforced Masonry Wall with Prestressing Technology

Buildings
Prestressing technology is an effective way to improve the seismic performance of masonry structures such as concrete masonry wall. Therefore, bonded prestressing technology applied to integrated concrete masonry wall (ICMW) was proposed in this study ...
Bin Chi, Yuhu Quan, Fenglai Wang, Xu Yang   +3 more
doaj   +1 more source

Characterization and Selection of Contractile Actuators for Soft Robotics Operating in the Quasistatic Regime

Advanced Intelligent Systems, EarlyView.
We developed methods to characterize soft contractile actuators using force–displacement measurements in the passive state and the total force in the active state and define the operational range of thermal, electrothermal, and pneumatic muscles. A graphical method enables the selection of an actuator based on the required mechanical force–displacement
Qiong Wang, Liuyang Cheng, Jeongmin Kim, Samuel Tsai, Devin Roach, Sameh Tawfick   +5 more
wiley   +1 more source

Experimental Study on the Torsional Behaviour of Prestressed HSC Hollow Beams

Applied Sciences, 2020
This article describes an experimental program developed to study the influence of longitudinal prestress on the behaviour of high-strength concrete hollow beams under pure torsion.
Luís Bernardo, Sérgio Lopes, Mafalda Teixeira   +2 more
doaj   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Effect of unbonded prestressing steel in terms of serviceability

Civil and Environmental Engineering
One of the methods of strengthening bridges is strengthening using unbonded post-tensioned prestressing steel e.g. strands type monostrand. The individual strands, protected with grease and HDPE coating, are routed polygonally.
Muroň Vlastimil, Klusáček Ladislav, Svoboda Adam   +2 more
doaj   +1 more source