THE EFFECT OF A FORMING FRACTAL FAILURE SURFACE ON THE DYNAMIC PROPERTIES OF TITANIUM

Abstract

The results of experimentally studying the dynamic properties of 3M titanium at various strain rates are presented. This material is widely used in shipbuilding, including items subject to impact loading. Failure characteristics of the researched studied are obtained for impact tension using a modification of Kolsky method. After dynamic tests, fractured specimens are cut along the tension axis along the diameter, and fractal dimensions of the failure surface relief are determined. Strain rate effect on the properties of titanium and on the value of fractal dimension is analyzed. The analysis of the results testifies to the increase of both strength and deformational (plastic) characteristics of titanium as compared with the static mechanic characteristics. A relation between the dynamic properties of titanium an fractal dimension is demonstrated.

Keywords: strain rate, fractal dimension, dynamic strength, experimental study, failure.