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Fatigue crack propagation behavior of ultrahigh molecular weight polyethylene

✍ Scribed by Dr. G. M. Connelly; C. M. Rimnac; T. M. Wright; R. W. Hertzberg; J. A. Manson

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 686 KB
Volume: 2
Category: Article
ISSN: 0736-0266
DOI: 10.1002/jor.1100020202

No coin nor oath required. For personal study only.

✦ Synopsis

The relative fatigue crack propagation resistance of plain and carbon fiber-reinforced ultrahigh molecular weight polyethylene (UHMWPE) was determined from cyclic loading tests performed on compact tension specimens machined from the tibia1 components of total knee prostheses. Both materials were characterized by dynamic mechanical spectroscopy, X-ray diffraction, and differential scanning calorimetry. The cyclic tests used loading in laboratory air at 5 Hz using a sinusoidal wave form. Dynamic mechanical spectroscopy showed that the reinforced UHMWPE had a higher elastic storage modulus than the plain UHMWPE, whereas X-ray diffraction and differential scanning calorimetry showed that the percent crystallinity and degree of order in the crystalline regions were similar for the two materials. Fatigue crack propagation in both materials proved to be very sensitive to small changes in the applied cyclic stress intensity range. A 10% increase in

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