Significance of linear stress-length maintenance in thin and thick wall elastic spheres

William W. Holt, Edward A. Rhode, Helga Kines, John Konhilas, Joseph P. Holt

Research output: Contribution to journalConference article

Abstract

Many elastic biologic structures are spherical or nearly so: their mechanics with regard to pressure and distending volume are not widely understood. Pressure (P) and volume (V) during inflation and deflation were determined in 9 rubber spheres with wall thickness ratio (WTR) ranging from 0.01 to 1.79. P rose with inflation: with more inflation P peaked and declined. The stress-length relation (SLR) remained linear. Wall and chamber cross-sectional areas (WAX and CAX, respectively) were nonlinearly related to middle-mass radius (MMR). Sphere elasticity (Esp) differed from that of longitudinal strips (Est) of the same material. P results from system geometry and linear SLR. The PV relation is curvilinear and Esp differs from Est by a factor of the square root of 2. These results have implications for the understanding of biologic structures.

Original languageEnglish (US)
Pages (from-to)303-304
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume16
Issue numberpt 1
StatePublished - Dec 1 1994
Externally publishedYes
EventProceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA
Duration: Nov 3 1994Nov 6 1994

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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