Author(s)

P.H. Oosthuizen, J. Jeswiet & W. Nashama

Abstract

A numerical evaluation of an inverse heat conduction procedure for determining contact resistance during metal forming P.H. Oosthuizen, J. Jeswiet & W. Nashama Department of Mechanical Engineering, Queen's University, Kingston, Ontario, Canada, K7L 3N6 ABSTRACT In order to experimentally determine the contact resistance during metal forming processes a technique to measure the temperatures very close to the two sides of the interface has been developed. This technique has been initially applied to a situation in which a short cylinder made from aluminium is squeezed between two steel dies. In this experimental study, the material is unheated and the heat flux results purely from the work being done on the aluminium. Using the measured temperature-time variations on each side of the interface, an inverse heat conduction procedure is used to deduce the value of the contact resistance. In this technique the internal heat generation is assumed to uniform in

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