A Penetrometer for Quantifying the Surface Stiffness of Sport Sand Surfaces
| Autor: | Hugo G. Espinosa, Florian S. M. Klodzinski, Matthew T. O. Worsey, Nicholas Emerson, David V. Thiel |
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| Rok vydání: | 2020 |
| Předmět: |
Novel technique
Future studies Correlation coefficient technology industry and agriculture Stiffness lcsh:A Depth of penetration Penetrometer law.invention penetrometer stiffness Surface stiffness sand sports beach running law parasitic diseases medicine Geotechnical engineering lcsh:General Works medicine.symptom human activities Geology Dry sand |
| Zdroj: | Proceedings, Vol 49, Iss 64, p 64 (2020) |
| Popis: | Sand sports include running, volleyball, soccer, beach flags, ironman, and fitness training. An increased amount of soft tissue injuries have been widely reported. A novel technique of determining the surface stiffness of beach sand in-situ used a simple drop-test penetrometer. The relationship between drop height and the depth of penetration squared was linear (Pearson’s correlation coefficient r2 > 0.92). The stiffness ratio between the soft dry sand and ocean-saturated wet sand compacted by eight hours of coastal water exposure was approximately seven, which was similar to previously reported stiffness measurements in a sand box. However, the absolute stiffness values were much smaller. While this technique was manually operated, an automatic system is postulated for future studies. |
| Databáze: | OpenAIRE |
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