Dynamic Behavior of Advanced Ti Alloy under Impact Loading: Experimental and Numerical Analysis

Abstract:

Industrial applications of Ti-based alloys, especially in aerospace, marine and offshore industries, have grown significantly over the years primarily due to their high strength, light weight as well as good fatigue and corrosion-resistance properties. A combination of experimental and numerical studies is necessary to predict a material behavior of such alloys under high strain-rate conditions characterized also by a high level of strains accompanied by high temperatures. A Split Hopkinson Pressure Bar (SHPB) technique is a commonly used experimental method to characterize a dynamic stress-strain response of materials at high strain rates. In a SHPB test, the striker bar is shot against the free end of the incident stress bar, which on impact generates a stress pulse propagating in the incident bar towards the specimen sandwiched between the incident and transmitted bars. An experimental study and a numerical analysis based on a three-dimensional finite element model of the SHPB experiment are performed in this study to assess various features of the underlying mechanics of deformation processes of the alloy tested at high-strain and -strain-rate regimes.

• Periodical: Applied Mechanics and Materials (Volume 70)
• Pages: 207-212
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.70.207
• Online since: August 2011
• Authors: Murat Demiral, Anish Roy, Vadim V. Silberschmidt
• Keywords: Numerical Analysis, Split Hopkinson Pressure Bar (SHPB), Ti-Based Alloy

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