2025 Volume 5 Issue 1
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Improving High-Strain-Rate Measurements via Stress Wave Dispersion Compensation in SHPB Experiments


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  1. Department of Clinical Medicine and Biomedical Sciences, Alexandria University, Alexandria, Egypt.
  2. Department of Medical Research Systems, Ain Shams University, Cairo, Egypt.
Abstract

The phenomenon of stress wave dispersion can attenuate or corrupt crucial high-frequency components during material testing at high strain rates or blast-loading trials. This study aims to demonstrate the value of applying dispersion compensation in split-Hopkinson pressure bar experiments conducted under various test conditions. For this purpose, a new computational framework, designated πš‚π™·π™Ώπ™±_π™Ώπš›πš˜πšŒπšŽπšœπšœπš’πš—πš.πš™πš’, is constructed. After guiding the reader through an operational overview of πš‚π™·π™Ώπ™±_π™Ώπš›πš˜πšŒπšŽπšœπšœπš’πš—πš.Using πš™πš’’s functionalities, the tool is deployed to analyze experimental records from split-Hopkinson pressure bar examinations of aluminum, sand, and kaolin clay specimens across a range of test configurations. A side-by-side evaluation of dispersion-corrected data and those obtained through straightforward time-alignment from SHPB trials reveals that taking dispersion into account suppresses artificial oscillations and refines the derived measurement at the specimen’s leading edge. The precision of the stress and strain outputs produced by its use highlights its critical role, as evidenced by the stark discrepancy between its deployment and its absence. This carries considerable weight for the credibility, exactitude, and caliber of the outcomes. Hence, moving forward, this instrument can be employed in any cylindrical-bar strain-rate testing context that demands dispersion rectification, confinement, or stress equilibrium appraisal.


How to cite this article
Vancouver
El-Kholy A, Abdelrahman N, Hassan K. Improving High-Strain-Rate Measurements via Stress Wave Dispersion Compensation in SHPB Experiments. Bull Pioneer Res Med Clin Sci. 2025;5(1):228-41. https://doi.org/10.51847/lZyFyppwlv
APA
El-Kholy, A., Abdelrahman, N., & Hassan, K. (2025). Improving High-Strain-Rate Measurements via Stress Wave Dispersion Compensation in SHPB Experiments. Bulletin of Pioneering Researches of Medical and Clinical Science, 5(1), 228-241. https://doi.org/10.51847/lZyFyppwlv
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