Results 81 to 90 of about 56,073 (234)

The effects of crack surface friction and roughness on crack tip stress fields [PDF]

A model is presented which can be used to incorporate the effects of friction and tortuosity along crack surfaces through a constitutive law applied to the interface between opposing crack surfaces.
Ballarini, Roberto, Plesha, Michael E.
core   +1 more source

Crater Observing Bioinspired Rolling Articulator (COBRA)

Advanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame, Henry Noyes, Eric Sihite, Arash Kalantari, Alireza Ramezani   +4 more
wiley   +1 more source

A Rothe method for a viscoelastic contact problem involving time-fractional derivatives in locking materials

Demonstratio Mathematica
This study examines a contact problem involving viscoelastic materials interacting with a rigid foundation. The constitutive relationship is derived from a time-fractional Kelvin–Voigt model.
Su Guangwang, Bouallala Mustapha, Chen Boling, Nguyen Van Thien   +3 more
doaj   +1 more source

Experimental analysis and modeling of orthogonal cutting using material and friction models [PDF]

, 2007
In this study, a process model for orthogonal cutting processes is proposed. The model involves the primary and secondary deformation zones. The primary shear zone is modeled by a Johnson-Cook constitutive relationship and a shear plane having constant ...
Budak, Erhan, Ozlu, Emre, Özlü, Emre
core  

A Novel Contact‐Implicit Trajectory Optimization Framework for Quadruped Locomotion without Fixed Contact Sequences

Advanced Intelligent Systems, EarlyView.
Legged robots have advanced in environmental interaction through contact, but most works rely on fixed contact sequences. This work presents a new method based on an indirect optimization method for legged robots to automatically generate contact sequences for complex movements.
Yaowei Chen, Jie Zhang, Ming Lyu
wiley   +1 more source

A Review of Trans‐Dimensional Kirigami: From Compliant Mechanism to Multifunctional Robot

Advanced Intelligent Systems, EarlyView.
This review outlines recent advancements in the geometric design and mechanical properties of kirigami. The kirigami is classified into two categories from a compliant mechanism perspective, highlighting their applications in metamaterials and robotic systems. Finally, the future research directions, is explored focusing on the potential of integrating
Yang Yu, Jinyao Zhang, Dengchen Wang, Yanqi Yin, Yehui Wu, Ruiyu Bai, Jiaqiang Yao, Yupei Zhang, Jingwen Yin, Chao Tang, Alexey S. Fomin, Wenjie Sun, Chen Liu, Bo Li, Guimin Chen   +14 more
wiley   +1 more source

Finite Element Simulation of High-Speed Blow Forming of an Automotive Component

Metals, 2018
High-speed blow forming (HSBF) is a new technology for producing components with complex geometries made of high strength aluminum alloy sheets. HSBF is considered a hybrid-superplastic forming method, which combines crash forming and gas blow forming ...
Omid Majidi, Mohammad Jahazi, Nicolas Bombardier   +2 more
doaj   +1 more source

Frictional experiments of dolerite at intermediate slip rates with controlled temperature: Rate weakening or temperature weakening? [PDF]

, 2011
A rotary shear apparatus has been newly set up in Chiba University which can control the temperature near a sliding surface, T_meas, up to 1000°C independently from slip rate, V.
Hirose, Takehiro, Inoue, Atsuyuki, Kanagawa, Kyuichi, Noda, Hiroyuki   +3 more
core  

Boundary lubrication with a glassy interface

, 2003
Recently introduced constitutive equations for the rheology of dense, disordered materials are investigated in the context of stick-slip experiments in boundary lubrication.
A. Argon, A. Mehta, A. Ruina, Anaël Lemaître, B. N. J. Persson, F. Bowden, F. Spaepen, G. S. Grest, H. K. Christenson, H. Yoshizawa, H. Yoshizawa, J. H. Dieterich, J. H. Dieterich, J. H. Dieterich, J. N. Israelachvili, J. R. Rice, J. Rice, Jean Carlson, K. Maeda, K. Maeda, L. C. E. Struik, L. F. Cugliandolo, M. L. Falk, M. Schoen, P. A. Thompson, S. Edwards, S. F. Edwards, S. Grannick, S. Takeuchi, T. Becker, V. Arnold   +30 more
core   +1 more source

Phase‐Change Alloys Enable Localized Reversible Stiffening and Actuation in Steerable Eversion Tip‐Growing Robots

Advanced Intelligent Systems, EarlyView.
This work presents a tip‐growing eversion robot that uses phase‐changing alloys for reversible stiffening and localized actuation, achieving 43× stiffness modulation, 15× force amplification, and segmental steering. The system enables precise navigation and force delivery in constrained, tortuous pathways.
Shamsa Al Harthy, S.M.Hadi Sadati, Shannon C. Stockdale, Radhouene Neji, Christos Bergeles   +4 more
wiley   +1 more source