Results 31 to 40 of about 196 (190)

Special Section on Ratcheting [PDF]

Journal of Pressure Vessel Technology, 2015
The design methods for pressure vessels and piping are based on the avoidance of potential modes of failure, such as collapse, excessive deformation, and cracking. Collapse and excessive deformation from a single load application are addressed by methods such as buckling analysis, primary stress analysis, and plastic limit analysis. For instance, limit
Reza, Adibi-Asl, Wolf, Reinhardt
openaire   +2 more sources

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

Local Search and the Evolution of World Models

Topics in Cognitive Science, EarlyView., 2023
Abstract An open question regarding how people develop their models of the world is how new candidates are generated for consideration out of infinitely many possibilities. We discuss the role that evolutionary mechanisms play in this process. Specifically, we argue that when it comes to developing a global world model, innovation is necessarily ...
Neil R. Bramley, Bonan Zhao, Tadeg Quillien, Christopher G. Lucas   +3 more
wiley   +1 more source

Implementing Demons and Ratchets [PDF]

Entropy, 2017
Experimental results show that ratchets may be implemented in semiconductor and chemical systems, bypassing the second law and opening up huge gains in energy production. This paper summarizes or describes experiments and results on systems that effect demons and ratchets operating in chemical or electrical domains.
Peter Orem, Frank Orem
openaire   +2 more sources

High Center‐of‐Mass, Multi‐Legged Soft Robots Powered by Geometrically Encoded Liquid Crystal Elastomer Arc Appendages

Advanced Materials, EarlyView.
Inspired by the octopus and the golden wheel spider, soft robots with liquid crystal elastomer arc fibers as appendages are fabricated to transcend surface constraints through an elevated center of mass and minimal contact footprints. By leveraging curvature‐encoded deformation‐recovery cycles, these robots exhibit contractile, torsional, and flexural ...
Jong Bin Kim, Antonio Proctor Martinez, Yaoye Hong, Ziyun Zhang, Kun‐Yu Wang, Shu Yang   +5 more
wiley   +1 more source

Progressive deformation behaviour of thin cylindrical shell under cyclic temperature variation using Combined Hardening Chaboche Model

Latin American Journal of Solids and Structures
This study intends to evaluate thermal ratchetting deformation due to cyclic thermal loading along the axis of a smooth cylindrical shell. Two cases of progressive deformation behaviour are discussed for different loading methods.
Ashutosh Mishra, R. Suresh Kumar, P. Chellapandi   +2 more
doaj   +1 more source

Competition and the Ratchet Effect [PDF]

SSRN Electronic Journal, 2008
In labor markets, the ratchet effect refers to a situation where workers subject to performance pay choose to restrict their output, because they rationally anticipate that firms will respond to higher output levels by raising output requirements or by cutting pay.
Charness, Gary, Kuhn, Peter, Villeval, Marie Claire   +2 more
openaire   +8 more sources

Programmable Etherified‐Starch Networks Enable Tunable Humidity‐Responsive Soft Actuators for Smart Textiles

Advanced Materials Interfaces, EarlyView.
Programmable etherified‐starch networks enable humidity‐responsive soft actuators with tunable and reversible deformation. By tailoring crosslinking density and structural design, rapid response, controllable actuation, and long‐term stability are achieved.
Dan Zhou, Jieqiong Yao, Kai Kang, Lingfeng Zhu, Zhenfang Zhang, Xin Wei, Yitong Li, Yiwen Zhong, Yingying Zhou, Miao Wang, Ruijun Wu, Yijun Yao, Caijuan Xia, Yang Fu   +13 more
wiley   +1 more source

Ratchet Cellular Automata [PDF]

Physical Review Letters, 2003
In this work we propose a ratchet effect which provides a general means of performing clocked logic operations on discrete particles, such as single electrons or vortices. The states are propagated through the device by the use of an applied AC drive. We numerically demonstrate that a complete logic architecture is realizable using this ratchet.
Hastings, M. B., Reichhardt, C. J. Olson, Reichhardt, C.   +2 more
openaire   +3 more sources

Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review

Advanced Robotics Research, EarlyView.
Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley   +1 more source