Mechanics of a Porous Web Moving Over a Cylindrical Guide-Reference-Cited by-同舟云学术

Mechanics of a Porous Web Moving Over a Cylindrical Guide

Published:1999-07-06 Issue:2 Volume:122 Page:418-426
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Mu¨ftu¨ Sinan¹,Cengiz Altan M.²

Affiliation:

1. Haystack Observatory, Massachusetts Institute of Technology, Westford, MA 01886

2. School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019

Abstract

A model for analyzing the interfacial conditions of a porous web moving over a cylindrical rigid guide is presented. This problem is different from the classical foil bearing problem due to the fact that the air can diffuse through the porous web itself. A micromechanics model is used to express the web porosity as a function of the fiber volume fraction of the web. Darcy’s law is used to account for the air flow and pressure drop across the web thickness, and a new modified Reynolds equation is derived to model the airflow in the web-guide interface. The porous web is modeled as a moving cylindrically curved beam, and the solid-body contact between the web and the guide is modeled using an asperity compliance function. The governing equations are nondimensionalized and important nondimensional parameters are identified. The coupled nonlinear steady-state system is solved using a modified Newton-Raphson algorithm. The traction characteristics of the web are presented for different porosity levels, asperity height, and compliance. [S0742-4787(99)00102-8]

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/122/2/418/5686831/418_1.pdf

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