Results 51 to 60 of about 47,414 (269)
Advanced Engineering Materials, EarlyView.The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu +8 more
wiley +1 more source
Study on the Calculation Model of Free Point Depth of Circular Arc Well
Shiyou jixie, 2018 The calculation of the free point depth of tubular is of great significance to the entire workover process. The previous calculation model does not take the well inclination and dynamic friction factor into consideration, resulting in a large error ...
Xu Qinghai +4 more
doaj
Fenmo yejin jishuThe friction properties and heat resistances of the iron-copper based powder metallurgy friction materials were tested by MM3000 friction and wear testing machine under 7 continuous braking conditions.
MA Ling +6 more
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Research on Nonlinear Dynamics Modeling and Simulation of Harmonic Gear Drive
Jixie chuandong, 2021 Due to the particularity of the structure，the hysteretic stiffness and dynamic friction belong to the inherent properties of harmonic gear drive. Traditional models consider the stiffness as a fixed stiffness or segmented stiffness model，and the friction
Yang Luo +4 more
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Financial Frictions and New Exporter Dynamics [PDF]
SSRN Electronic Journal, 2014 This article studies the role of financial frictions as a barrier to international trade. We study new exporter dynamics to identify how these frictions affect export decisions. We introduce a borrowing constraint and working capital requirements into a standard model of international trade, with exports more working capital intensive than domestic ...
David Kohn +2 more
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan +5 more
wiley +1 more source
Improving the energy efficiency of power transmissions of a rolling stock on the basis of dynamic anisotropy of frictional contact [PDF]
E3S Web of Conferences, 2019 The analysis showed the following tendencies of development and energy efficiency of designs of gearboxes for track machines: provision of a maximum level of efficiency, removal of rupture of a stream of the passed capacity, provision of a high level of ...
Shapovalov Vladimir +4 more
doaj +1 more source
DYNAMICAL FRICTION AROUND SUPERMASSIVE BLACK HOLES [PDF]
The Astrophysical Journal, 2011 The density of stars in galactic bulges is often observed to be flat or slowly rising inside the influence radius of the supermassive black hole (SMBH). Attributing the dynamical friction force to stars moving more slowly than the test body, as is commonly done, is likely to be a poor approximation in such a core since there are no stars moving more ...
Antonini, Fabio, Merritt, David
openaire +3 more sources
Numerical Exploration of Thermal Shock Resistance in MgO–C Refractories
Advanced Engineering Materials, EarlyView.A mesostructure‐resolved numerical framework is developed to evaluate the thermal shock resistance of MgO–C refractories. By modeling interface debonding under rapid temperature changes and introducing a modified thermal shock parameter that accounts for mesocracks, the study shows how graphite content and aggregate size influence thermal shock ...
Jishnu Vinayak Gopi +3 more
wiley +1 more source
Mathematical and Computer Modelling of Dynamical SystemsIn order to obtain the dynamic stress response of the drum and main shaft of a friction hoist under dynamic loads, a dynamic stress calculation model for the friction hoist was constructed based on the flexible multibody modelling method.
Kai Xu, Ying Xiao, Yi Liu
doaj +1 more source