Contributions of anharmonicity to the size and surface effects in the specific heat of the monatomic linear chain are investigated with anharmonic perturbation theory for small to intermediate number of atoms and for temperatures from 0 K up to 0, , the zero-temperature Debye temperature. It is shown that the surface specific heat Cs can reliably be extracted for chaiis of intermediate particle number, although size effects are still quite appreciable for chains of as many as 60 atoms. The main effects of anharmonicity in the surface specific heat (as compared to that of a harmonic chain) are a small peak a t T = 0.090, and a linear increase with T for T 2 0.70,.Fiir eine kleine bis mittlere Zahl von Atomen und fiir Temperaturen zwischen OK und 0, , der Nullpunkts-Debye-Temperatur, werden die anharmonischen Beitriige zum Size-und Oberflacheneffekt der spezifischen Wjirme einer monoatomaren Kette mit anharmonischer Storungsthcorie untersucht. Es wird gezeigt, daB die spezifische Oberfliichenwiirme Cs zuverliissig fur Ketten mit mittlerer Teilchenzahl erhalten werden kann, obwohl die SizeEffekte noch fur Ketten von bis zu 50 Atomen betriichtlich ist. Die Haupteffekte der Anharmonizitiit in der spezifischen Oberflachenwiirme (verglichen mit der harmonischen Kette) sind ein kleines Maximum bei T x 0,090, und ein linearer Anstieg mit T fiir T 2 0,70,.
At present, the process of designing dry friction units for mechanical engineering and some other structures is becoming more and more laborious, forcing designers to make more and more efforts in this work. A significant complication of the work performed gives the random nature of the roughness of both contacting surfaces and this circumstance forces the designers to look for new ways to solve existing problems. In this paper, we consider the contact interaction of two rough parts, the roughness of which is modeled by spherical surfaces. The proposed friction pair model makes it possible to estimate the interaction forces of contacting rough surfaces acting between the considered surfaces. It should be emphasized that this paper considers the interaction of contacting bodies with an applied external force capable of starting the relative movement / sliding of the considered bodies with rough surfaces.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.