Effect of Specimen Thickness on Fracture Toughness of Bovine Patellar Cartilage
Author:
Adams D. J.1, Brosche K. M.2, Lewis J. L.2
Affiliation:
1. Department of Orthopaedic Surgery, MC-4037, University of Connecticut Health Center, Farmington, CT 06030 2. Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN 55455
Abstract
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 1.03kJ/m2 was not statistically different than that reported previously for canine patellar cartilage 1.07kJ/m2 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.
Publisher
ASME International
Subject
Physiology (medical),Biomedical Engineering
Reference11 articles.
1. Kempson, G. E., 1979, “Mechanical properties of articular cartilage.” In Freeman, M.A.R. (ed): Adult Articular Cartilage, ed 2. Kent, UK, Pitman Medical Publishers, pp. 333–414. 2. Mow, V. C., Ateshian, G. A., and Spilker, R. L., 1993, “Biomechanics of diarthrodial joints: A review of twenty years of progress.” J. Biomech. Eng., 115, pp. 460–467. 3. Mow, V. C. and Radcliffe, A., 1997, “Structure and function of articular cartilage and meniscus.” In Mow, V. C. and Hayes, W. C., Basic Orthopaedic Biomechanics, ed 2. Philadelphia, PA, Lippincott-Raven Press, pp. 113–177. 4. Roberts, S., Weightman, B., Urban, J., Chappell, D., 1986, “Mechanical and biochemical properties of human articular cartilage in osteoarthritic femoral heads and in autopsy specimens.” J. Bone Jt. Surg., 68B, pp. 278–288. 5. Schmidt, M. B., Mow, V. C., Chun, L. E., and Eyre, D. R., 1990, “Effects of proteoglycan extraction on the tensile behavior of articular cartilage.” J. Orthop. Res., 8, 353–363.
Cited by
10 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
|
|