Fidelity of contact stress gradient detection by pressensor film

Joseph L. Hale, Thomas D. Brown

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Fuji Pressensor film has been widely used for measuring contact stresses in articular joints. In relatively smooth contact fields, measurement errors are reported to be in the range of approximately 10-15%.However, when local incongruities exist, strong contact stress gradients are present. This study investigates the film's capability to accurately transduce such gradients. Standardized stress distributions were produced by compressing the film between a rigid cylinder and an elastic layer supported by a rigid substrate. Seven different cylinder radii were used to obtain a range of gradient magnitudes. The resulting stains were digitized, and the contact stress gradients assessed by image analysis. Experimentally detected gradients were compared with those predicted analytically. The films capability to reliably transduce contact stress gradients was shown to be sufficient for usage in the study of typical local articular incongruities.

Original languageEnglish (US)
Title of host publicationAdvances in Bioengineering
EditorsJohn M. Tarbell
PublisherPubl by ASME
Pages405-408
Number of pages4
ISBN (Print)0791810313
StatePublished - Dec 1 1993
EventProceedings of the 1993 ASME Winter Annual Meeting - New Orleans, LA, USA
Duration: Nov 28 1993Dec 3 1993

Publication series

NameAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Volume26

Other

OtherProceedings of the 1993 ASME Winter Annual Meeting
CityNew Orleans, LA, USA
Period11/28/9312/3/93

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