Use of the Kolsky Bar Method for Studying High-Rate Deformation Processes in Materials of Various Physical Natures

TL;DR

This paper evaluates and enhances the Kolsky Bar method for high-rate deformation studies, addressing errors, proposing modifications, and extending its applicability to various materials including brittle ones.

Contribution

The paper introduces original modifications to the Kolsky method, broadening its use for different stress-strain states and material types, especially brittle materials.

Findings

Errors due to inertia and friction are quantified.

Modified techniques expand the range of measurable properties.

The method's applicability to brittle materials is demonstrated.

Abstract

An analysis is presented of the applicability of the Kolsky technique for studying the high-rate deformation processes of structural materials under compression. Errors in the method caused by inertia and friction are estimated. Modifications of the Kolsky method for studying the properties of materials subjected to various stress-strain states are considered. Original modifications of the method are presented that significantly expand the range of mechanical properties that can be investigated. Issues connected with using the Kolsky method to study the properties of brittle materials are analyzed.