期刊
JOURNAL OF BIOMECHANICS
卷 39, 期 14, 页码 2593-2602出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2005.08.028
关键词
liquid jet injection; fracture mechanics; penetration; skin; rubber; soft solid; soft tissue
Liquid jet injections have been performed on human skin in vivo and silicone rubber using Intraject needle-free injectors. The discharge characteristics of the liquid jet were measured using a custom-built test instrument. The experiments reveal that a highspeed liquid jet penetrates a soft solid by the formation and opening of a planar crack. The fluid stagnation pressure required for skin penetration decreases with increasing diameter of the liquid jet. These findings are consistent with the slow-speed penetration of a soft solid by a sharp-tipped punch. It is demonstrated that the Shergold-Fleck sharp-tipped punch penetration model [Shergold, O.A., Fleck, N.A., 2004. Mechanisms of deep penetration of soft solids. Proc. Roy. Soc. Lond. A 460, 3037-3058.] gives adequate predictions for the pressure required to penetrate a soft solid by a high-speed liquid jet. (c) 2005 Elsevier Ltd. All rights reserved.
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