The Reaction of Skin and Soft Tissue to Shear Forces Applied Externally to the Skin Surface
- 1 December 1994
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
- Vol. 208 (4), 217-222
- https://doi.org/10.1243/pime_proc_1994_208_291_02
Abstract
The reaction of skin and soft tissue to shear force applied externally to the skin surface has been investigated by the experimental measurement of skin blood flow and model analysis of internal stresses. Skin blood flow has been measured using laser Doppler flowmetry while variable shear forces and normal force were applied to the skin surface. The experimental results show that the skin blood flow is reduced by increasing either normal force or shear force; the magnitude of the reduction being nearly proportional to the resultant of the normal and shear forces. The internal stresses were analysed by simplified models incorporating elasticity theory. The analyses indicate that shear force changes the stress distribution mainly in the superficial layer of the soft tissue and increases the stress in the area ahead of the direction of application; the maximum internal compression stress was found to be determined by the resultant of normal and shear forces. The study suggests that the resultant force is the most critical parameter in assessing the effect of load applied to the skin; and shear force has the same effect on skin and underlying tissue as normal force.Keywords
This publication has 5 references indexed in Scilit:
- The effect of shear forces externally applied to skin surface on underlying tissuesJournal of Biomedical Engineering, 1993
- The Cutaneous CirculationPublished by Springer Science and Business Media LLC ,1990
- Prevention of blisters, callosities and ulcers by absorption of shear forcesJournal of the American Podiatric Medical Association, 1968
- THE PATHOGENESIS OF DECUBITUS ULCERSJournal of the American Geriatrics Society, 1962
- EXPERIMENTAL FRICTION BLISTERS.British Journal of Dermatology, 1955