The Effects of Friction on the Compressive Behaviour of High Strength Steels

An investigation. covering a wide range of strain rate and temperature. has been performed into the effects of interfacial friction on the compressive properties of an arniour plate steel. In order to calculate the coefficient of friction, ring tests were carried out and the Avitzur analysis applied. In general. coefficients of friction decreased with increasing temperature and strain rate. Other specimen observations indicated the same friction trends. It is essential that friction corrections be applied if meaningful results are to be obtained. Resume : Une etude qui uaite une selection de vitesses de deformation et de temperatures est realisee akin de connaitre les effets d'un frottement intert'dcial sur le comportement sous pression d'une plaque d'acier i blindage. Des calculs d'anneaux sont effectuis et I'analyse d'Avitzur appliqute afin de calculer la coefficiet~t de frottement. En general, les coefficienr de frottement baissent ?i une temperature et une viresse de dkformarion plus elevees. Plusieurs auues observalions indiquent la mtme tendance du frottement. I1 est essentiel que les corrections du frottement soienr appliqukes atin d'obtenir des resultats signiticatifs.