Experimental investigation of frictional and viscoelastic properties of intestine for microendoscope application

J. S. Kim, I. H. Sung, Y. T. Kim, E. Y. Kwon, D. E. Kim, Y. H. Jang

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

The information on the frictional resistance of a self-propelled robotic capsule endoscope moving inside the body is very important for the design and the performance enhancement of such parameters of the capsule endoscope as power consumption, motion control and positioning accuracy. Based on this motivation, the ultimate goal of this research was to develop an analytical model that can predict the frictional resistance of the capsule endoscope moving inside the living body. In this work, experimental investigations of the fundamental frictional characteristics and the viscoelastic behaviors of the small intestine were performed by using custom-built testers and various capsule dummies. The small intestine of a pig was used for the experiments. Experimental results showed that the average frictional force was 10-50 mN and higher moving speed of the capsule dummy resulted in larger frictional resistance of the capsule. In addition, the friction coefficient did not change significantly with respect to the apparent area of contact between the capsule dummy and the intestine, and also the friction coefficients decreased with an increase in the normal load and varied from 0.08 to 0.2. Such frictional behaviors could be explained by the lubrication characteristics of the intestine surface and typical viscoelastic characteristics of the small intestine material. Also, based on the experimental results, a viscoelasticity model for the stress relaxation of the small intestine could be derived.

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalTribology Letters
Volume22
Issue number2
DOIs
Publication statusPublished - 2006 May 1

Fingerprint

intestines
Endoscopy
capsules
Capsules
endoscopes
dummies
Friction
Viscoelasticity
Stress relaxation
Motion control
Lubrication
Analytical models
Robotics
Electric power utilization
coefficient of friction
swine
viscoelasticity
stress relaxation
lubrication
robotics

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

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title = "Experimental investigation of frictional and viscoelastic properties of intestine for microendoscope application",
abstract = "The information on the frictional resistance of a self-propelled robotic capsule endoscope moving inside the body is very important for the design and the performance enhancement of such parameters of the capsule endoscope as power consumption, motion control and positioning accuracy. Based on this motivation, the ultimate goal of this research was to develop an analytical model that can predict the frictional resistance of the capsule endoscope moving inside the living body. In this work, experimental investigations of the fundamental frictional characteristics and the viscoelastic behaviors of the small intestine were performed by using custom-built testers and various capsule dummies. The small intestine of a pig was used for the experiments. Experimental results showed that the average frictional force was 10-50 mN and higher moving speed of the capsule dummy resulted in larger frictional resistance of the capsule. In addition, the friction coefficient did not change significantly with respect to the apparent area of contact between the capsule dummy and the intestine, and also the friction coefficients decreased with an increase in the normal load and varied from 0.08 to 0.2. Such frictional behaviors could be explained by the lubrication characteristics of the intestine surface and typical viscoelastic characteristics of the small intestine material. Also, based on the experimental results, a viscoelasticity model for the stress relaxation of the small intestine could be derived.",
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Experimental investigation of frictional and viscoelastic properties of intestine for microendoscope application. / Kim, J. S.; Sung, I. H.; Kim, Y. T.; Kwon, E. Y.; Kim, D. E.; Jang, Y. H.

In: Tribology Letters, Vol. 22, No. 2, 01.05.2006, p. 143-149.

Research output: Contribution to journalArticle

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