Results 1 to 10 of about 157,871 (287)

Femtosecond Laser Polishing of AlN Ceramics and Numerical Simulation of Ablated Morphology [PDF]

open access: yesMicromachines
To meet the surface polishing requirements of aluminum nitride (AlN) ceramics, this study developed a multi-objective optimization experimental model based on response surface methodology (RSM), with surface roughness as the key optimization target.
Ruikang Shi   +3 more
doaj   +2 more sources

Frictional heat induced morphological responses at the interface in rotary friction welding of austenitic alloys: corona-bond and heat-pattern

open access: yesJournal of Materials Research and Technology, 2023
Frictional heat induced morphological responses of austenitic alloys SUS304, A286, and Inconel 718 at the interface in rotary friction welding was focused in this study, addressing initiation, evolution of corona-bond and the formation of heat-pattern ...
Feng Jin   +8 more
doaj   +1 more source

Physics of martial arts: Incorporation of angular momentum to model body motion and strikes

open access: yesPLoS ONE, 2021
We develop a physics-based kinematic model of martial arts movements incorporating rotation and angular momentum, extending prior analyses. Here, our approach is designed for a classroom environment; we begin with a warm-up exercise introducing counter ...
Alexis Merk, Andrew Resnick
doaj   +2 more sources

A Mixed Lubrication Model of Piston Rings on Cylinder Liner Contacts Considering Temperature-Dependent Shear Thinning and Elastic–Plastic Contact

open access: yesLubricants, 2023
This work develops a numerical methodology for predicting the performance of an automotive piston ring system by considering contact and lubrication mechanics.
Nolan Ryan Chu   +3 more
doaj   +1 more source

Mixed Lubrication Modeling of Multi-Lip Reciprocating Seals Based on Elastohydrodynamic Lubrication Theory

open access: yesMachines, 2022
Multi-lip reciprocating seals are extensively used in the subject of engineering equipment. However, the current research on the tribology of reciprocating seals mainly focused focuses on the numerical analysis of single-lip seals.
Donghong Cheng, Lichen Gu, Yu Sun
doaj   +1 more source

How friction and adhesion affect the mechanics of deep penetration in soft solids

open access: yesSoft Matter, 2022
Friction and adhesion create an increment in penetration force with the depth of the penetrator (needle) tip. This work provides the correlation between the force increment, the material properties and the needle radius.
Stefano Fregonese, Mattia Bacca
openaire   +3 more sources

Mathematics in Finite Element Modeling of Computational Friction Contact Mechanics 2021–2022

open access: yesMathematics, 2023
In engineering practice, structures with identical components or parts are useful from several points of view: less information is needed to describe the system; designs can be conceptualized quicker and easier; components are made faster than during ...
Nicolae Pop, Marin Marin, Sorin Vlase
doaj   +1 more source

Evaluation and Comparison of Moment-to-Force Ratio of a New “PRP Loop” with that of Opus Loop and L Loop- A Finite Element Method Study [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2023
Introduction: Extraction space closure is the foremost challenging procedure in the field of orthodontics which needs a robust understanding of biomechanics.
Smita Kumari   +3 more
doaj   +1 more source

From the Fan-KKM principle to extended real-valued equilibria and to variational-hemivariational inequalities with application to nonmonotone contact problems

open access: yesFixed Point Theory and Algorithms for Sciences and Engineering, 2022
This paper starts off by the celebrated Knaster–Kuratowski–Mazurkiewicz principle in the formulation by Ky Fan. We provide a novel variant of this principle and build an existence theory for extended real-valued equilibrium problems with general, then ...
Joachim Gwinner
doaj   +1 more source

Invariance Properties of the Entropy Production, and the Entropic Pairing of Inertial Frames of Reference by Shear-Flow Systems

open access: yesEntropy, 2021
This study examines the invariance properties of the thermodynamic entropy production in its global (integral), local (differential), bilinear, and macroscopic formulations, including dimensional scaling, invariance to fixed displacements, rotations or ...
Robert K. Niven
doaj   +1 more source

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