ON A METHOD TO DEDUCE FRICTION-INDUCED TEMPERATURES FROM THERMAL STRAIN-MEASUREMENTS IN THE DRY SLIDING OF METALLIC PAIRS

This paper proposes a procedure to utilize thermal strains as a thermo metric mean to recover the temperature distribution in tribe-specimens . The procedure is demonstrated in relation to strain data obtained by the analysis of the so-called ''Double Exposure Speckle Grams''. Tota l strain components, are resolved into: elastic, plastic, and thermal. These in turn are used to construct a system of difference equations, the solution of which, yields a complete characterization of the stra in fields. Thermal strains are subsequently fed in a look-up table con taining the coefficient of thermal expansion for the test material at different temperatures to yield the temperature distribution. The resu lts are validated by comparison to an analytical model and, relevant e xperimental data. (C) 1998 Elsevier Science Ltd.