Fracture toughness and crack tip opening angle were measured for bovine patellar cartilage using modified single-edged notch specimens of two thicknesses. There was no difference in fracture toughness between thin (0.7 mm) versus relatively thick (2.7 mm) specimens, but the crack tip opening angle at initiation of crack propagation was larger for the thin specimens (106 deg) than for the thick specimens (70 deg). Fracture toughness of the bovine patellar cartilage was not statistically different than that reported previously for canine patellar cartilage employing the same methods. Large variation in measurements for both bovine and canine cartilage are in part attributable to variation between individual animals, and are consistent with variation in other mechanical property measurements for articular cartilage. The observed reduction in crack tip opening angle with increased specimen thickness is consistent with behavior of some engineering materials, and demonstrates that specimen thickness influences fracture behavior for bovine patellar cartilage.
Effect of Specimen Thickness on Fracture Toughness of Bovine Patellar Cartilage
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received December 31, 2002 by the Bioengineering Division; revision received April 22, 2003. Associate Editor: L. Sutton.
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Adams , D. J., Brosche , K. M., and Lewis, J. L. (January 9, 2004). "Effect of Specimen Thickness on Fracture Toughness of Bovine Patellar Cartilage ." ASME. J Biomech Eng. December 2003; 125(6): 927–929. https://doi.org/10.1115/1.1635405
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