A Composite Micromechanical Model for Connective Tissues: Part II—Application to Rat Tail Tendon and Joint Capsule

[+] Author and Article Information
H. K. Ault, A. H. Hoffman

Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609

J Biomech Eng 114(1), 142-146 (Feb 01, 1992) (5 pages) doi:10.1115/1.2895438 History: Received January 02, 1990; Revised April 30, 1991; Online March 17, 2008


A micromechanical model of fibrous soft tissue has been developed which predicts upper and lower bounds on mechanical properties based on the structure and properties of tissue components by Ault and Hoffman [3, 4]. In this paper, two types of biological tissue are modeled and the results compared to experimental test data. The highly organized structure of rat tail tendon is modeled using the upper bound aggregation rule which predicts uniform strain behavior in the composite material. This model fits the experimental data and results in a correlation coefficient of 0.98. Applied to cat knee joint capsule, the lower bound aggregation rule of the model correlates with the data and predicts uniform stress within this more loosely organized tissue structure. These studies show that the nature of the interactions between the components in tissue differs depending upon its structure and that the biomechanical model is capable of analyzing such differences in structure.

Copyright © 1992 by The American Society of Mechanical Engineers
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