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Use of fracture mechanics theory in lifetime predictions for alumina and bioglass-coated alumina

✍ Scribed by Ritter, J. E. ;Greenspan, D. C. ;Palmer, R. A. ;Hench, L. L.

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
551 KB
Volume
13
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

The fatigue behavior of alumina and bioglass‐coated alumina was determined in air and biological test environments by the dynamic fatigue test technique in which strength is measured as a function of stressing rate. The good correlation found between the test data and fracture mechanics theory indicates that fatigue failure is controlled by the slow crack growth of preexisting flaws and that fracture mechanics theory can be used in making failure predictions for alumina and bioglass‐coated alumina in biological environments. Thus, it is believed that lifetime predictions can be made for ceramic implants on the basis of short‐term test data utilizing fracture mechanics principles.

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