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The split-Hopkinson pressure bar (SHPB) technique has been adapted to measure the dynamic response of soil to impulse loads. The experimental technique is relatively simple and can investigate soil response in regimes beyond the capabilities of current equipment used for dynamic soil laboratory investigations. Soils have several characteristics that must be considered in designing a SHPB experiment and evaluating the data (for example, low wave speeds, nonlinear hysteretic behavior, and low unconfined compressive strength compared to the applied loads). Insight has been gained as to how these factors affect experimental accuracy and data reliability. It has been shown that the experimental assumptions can be satisfied and that the experimental results can be replicated.
Chief, Geological Response Section, Air Force Weapons Laboratory, Kirtland, AFB, NM
Senior scientist, K-tech Corporation, Albuquerque, NM
Staff member, Los Alamos National Laboratory, Los Alamos, NM
Professor and chairman, University of South Alabama, Mobile, AL
Stock #: GTJ10545J