The simple shear test may provide unique information regarding the material response of parallel-fibered soft tissues because it allows the elimination of the dominant fiber material response from the overall stresses. However, inhomogeneities in the strain field due to clamping and free edge effects have not been documented. The finite element method was used to study finite simple shear of simulated ligament material parallel to the fiber direction. The effects of aspect ratio, clamping prestrain, and bulk modulus were assessed using a transversely isotropic, hyperelastic material model. For certain geometries, there was a central area of uniform strain. An aspect ratio of 1:2 for the fiber to cross-fiber directions provided the largest region of uniform strain. The deformation was nearly isochoric for all bulk moduli indicating this test may be useful for isolating solid viscoelasticity from interstitial flow effects. Results suggest this test can be used to characterize the matrix properties for the type of materials examined in this study, and that planar measurements will suffice to characterize the strain. The test configuration may be useful for the study of matrix, fiber-matrix, and fiber-fiber material response in other types of parallel-fibered transversely isotropic soft tissues.
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April 2001
Technical Papers
Simple Shear Testing of Parallel-Fibered Planar Soft Tissues
John C. Gardiner,
John C. Gardiner
Department of Bioengineering, The University of Utah, 50 South Central Campus Drive #2480, Salt Lake City, UT 84112
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Jeffrey A. Weiss
e-mail: jeff.weiss@utah.edu
Jeffrey A. Weiss
Department of Bioengineering, The University of Utah, 50 South Central Campus Drive #2480, Salt Lake City, UT 84112
Search for other works by this author on:
John C. Gardiner
Department of Bioengineering, The University of Utah, 50 South Central Campus Drive #2480, Salt Lake City, UT 84112
Jeffrey A. Weiss
Department of Bioengineering, The University of Utah, 50 South Central Campus Drive #2480, Salt Lake City, UT 84112
e-mail: jeff.weiss@utah.edu
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division Jan. 2000; revised manuscript received Dec. 2000. Associate Editor: L. A. Setton.
J Biomech Eng. Apr 2001, 123(2): 170-175 (6 pages)
Published Online: December 1, 2000
Article history
Received:
January 1, 2000
Revised:
December 1, 2000
Citation
Gardiner , J. C., and Weiss, J. A. (December 1, 2000). "Simple Shear Testing of Parallel-Fibered Planar Soft Tissues ." ASME. J Biomech Eng. April 2001; 123(2): 170–175. https://doi.org/10.1115/1.1351891
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