Dynamic Test System with Direct Impact and Split Hopkinson Pressure Bar Modules for Advanced Material Characterization
Abstract
A comprehensive understanding of the behavior of materials subjected to high rate loading conditions is vital in order to anticipate the extent of the damage and failure mechanism as a result of highly dynamic incidents such as blast loading, shock wave loading, and ballistic impact loading. The Split Hopkinson Pressure Bar (SHPB) is one of the most popular, precise, and reliable apparatuses used to study and research the dynamic behavior and fracture mechanisms of materials up to strain rates of approximately 10^4 s^-1. The Hopkinson bar is implemented to apply a dynamic load on a material comparable to what it will undergo in dynamic situations like vehicle crashes, ballistic impact loading, shock wave loading, or other high-energy events. This test allows the extraction of the applied force and the load point displacement versus time by considering the propagating waves in an instrumented elastic bar and enables material properties to be determined in dynamic conditions. This DURIP proposal provides funding to support the acquisition of a dynamic test system with direct impact and split Hopkinson pressure bar modules to study the high strain rate behavior of advanced materials that are of interest to the Department of Defense (DoD). While this tool will be used in research for a wide range of materials such as nickel-chromium-based superalloys, flexible electronics, etc., the primary interest in acquiring a Dynamic Test System is to enhance the research capability on the impact response of additively manufactured advanced materials such as Inconel 625 and Inconel 718 that has not been studied in sufficient detail yet.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 01, 2019
- Source ID
- W911NF1910185
Entities
People
- Keivan Davami
Organizations
- Army Contracting Command
- Lamar University
- United States Army