Results 31 to 40 of about 764 (184)

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

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

EFFECT OF THE STRANDS FIXITY PROFILE SHAPE ON THE FLEXURAL BEHAVIOR OF STEEL BEAMS

Journal of Engineering and Sustainable Development
This study concerns the effect of the external prestressing strand shape profile on the flexural behavior of steel beams. Seven steel beams that have the same cross-section are strengthened by external strands fixed by using Saddle Points of Deviation ...
Mohammed Rasheed, Kamal Mahmoud, Mustafa Ahmed Yousif , Ahmed F. Abdullah   +3 more
doaj   +1 more source

Prestress loss in externally FRP reinforced self prestressing concrete beams [PDF]

Construction and Building Materials, 2015
Abstract Hybrid fiber-reinforced polymer (FRP) reinforced expansive concrete (EC) structural system shows a good potential for delaying concrete cracking and eliminating steel corrosion. In this study, long-term expansion-shrinkage strain development and prestress loss of the proposed system are investigated.
Qi Cao, Jinju Tao, Zhongguo John Ma
openaire   +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

The Safety Assessment and Reinforcement of Interchange Ramp Bridge

Chemical Engineering Transactions, 2015
The interchange ramp bridge in study is a continuous pre-stressed concrete box beam bridge. A comparative study of calculated rupture conditions of beam structure under different assumptions and the practically tested rupture conditions illustrates that ...
S.R. Chen, Q.S. Yan
doaj   +1 more source

Corrosion Detection in PSC Bridge Tendons Using Kernel PCA Denoising of Measured MFL Signals

Sensors, 2020
The construction of prestressed concrete bridges has witnessed a steep increase for the past 50 years worldwide. The constructed bridges exposed to various environmental conditions deteriorate all along their service life.
Chang Kook Oh, Changbin Joh, Jung Woo Lee, Kwang-Yeun Park   +3 more
doaj   +1 more source

Shear Behavior of RC Beams Strengthened by External Vertical Prestressing Rebar

Advances in Civil Engineering, 2021
Shear design is an important part of structural design. External vertical prestressing rebars (EVPRs) have proven to be an effective way to enhance structural shear resistance.
Ying Li, Meizhong Wu, Weiqi Wang, Xingwei Xue   +3 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

Experimental Study and Finite Element Simulation of Externally Prestressed CFRP Plate Strengthened Pre-Cracked Reinforced Concrete T-Beam

Buildings
Cracking in reinforced concrete beam bridges severely compromises their durability and structural integrity. Although external prestressed CFRP plate reinforcement technology has emerged as an effective repair solution, current design codes primarily ...
Jiaqi Huang, Shunchao Chen, Peng Kang, Zhaohua Ma, Ruipeng Wang   +4 more
doaj   +1 more source