Determination of Lubricant Bulk Modulus in Metal Forming by Means of a Simple Laboratory Test and Inverse FEM Analysis

S. M. Hafis, P. Christiansen, P. A. F. Martins, N. Bay

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The influence of workpiece surface topography on friction, lubrication and final surface equality in metal forming operations is well known and has been pointed out by many researchers.This is especially the case when liquid lubricants are applied in situations, where increased surface roughness facilitates the lubricant entrainment, pressurization and possible escape by micro-plasto-hydrodynamic lubrication. In order to model these mechanisms an important lubricant propertyd esignated as the bulk modulus is needed for characterizing the compressibility of the lubricant. The present paper describes a simple, practical test to determine the bulk modulus. Combination of the experimental upsetting of an axisymmetric metal workpiece containing a truncated conical surface pocket with an inverse finite element analysis of the test allows determining the lubricant bulk modulus. The finite element analysis couples lubricant flow with plastic deformation of the metal directly. Results show that the proposed procedure allows determining an approximate bulk modulus for the lubricant.
Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Tribology in Manufacturing Processes
Publication date2016
Pages316-323
ISBN (Print)978-616-92565-0-2
Publication statusPublished - 2016
Event7th International Conference on Tribology in Manufacturing Processes (ICTMP 2016) - Mövenpick Resort & Spa Karon Beach Phuket, Phuket, Thailand
Duration: 28 Feb 20162 Mar 2016
http://www.ictmp2016.com/

Conference

Conference7th International Conference on Tribology in Manufacturing Processes (ICTMP 2016)
LocationMövenpick Resort & Spa Karon Beach Phuket
CountryThailand
CityPhuket
Period28/02/201602/03/2016
Internet address

Keywords

  • Metal forming
  • Lubricant
  • Bulk modulus

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